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commit 57cd99ef357f16c5d54b2cddcb9294771044782a
Author: jenkins <bu...@apache.org>
AuthorDate: Tue Feb 26 15:41:32 2019 +0000
Published site at c33ceb23d3e1b7d1b9b6d957342b5fa3aa70b29f.
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<span class="sourceLineNo">025</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.isGood;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.mergeRegionLocations;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.removeRegionLocation;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import static org.apache.hadoop.hbase.client.RegionInfo.createRegionName;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import static org.apache.hadoop.hbase.util.Bytes.BYTES_COMPARATOR;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;<a name="line.32"></a>
-<span class="sourceLineNo">033</span><a name="line.33"></a>
-<span class="sourceLineNo">034</span>import java.io.IOException;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import java.util.Arrays;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import java.util.HashSet;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import java.util.Iterator;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import java.util.LinkedHashMap;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import java.util.Map;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import java.util.Optional;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import java.util.Set;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import java.util.concurrent.CompletableFuture;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentMap;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentNavigableMap;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import java.util.concurrent.ConcurrentSkipListMap;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.commons.lang3.ObjectUtils;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.HConstants;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.TableName;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.TableNotFoundException;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.client.Scan.ReadType;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.slf4j.Logger;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.slf4j.LoggerFactory;<a name="line.59"></a>
-<span class="sourceLineNo">060</span><a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hbase.thirdparty.com.google.common.base.Objects;<a name="line.62"></a>
-<span class="sourceLineNo">063</span><a name="line.63"></a>
-<span class="sourceLineNo">064</span>/**<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * The asynchronous locator for regions other than meta.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> */<a name="line.66"></a>
-<span class="sourceLineNo">067</span>@InterfaceAudience.Private<a name="line.67"></a>
-<span class="sourceLineNo">068</span>class AsyncNonMetaRegionLocator {<a name="line.68"></a>
-<span class="sourceLineNo">069</span><a name="line.69"></a>
-<span class="sourceLineNo">070</span> private static final Logger LOG = LoggerFactory.getLogger(AsyncNonMetaRegionLocator.class);<a name="line.70"></a>
-<span class="sourceLineNo">071</span><a name="line.71"></a>
-<span class="sourceLineNo">072</span> @VisibleForTesting<a name="line.72"></a>
-<span class="sourceLineNo">073</span> static final String MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE =<a name="line.73"></a>
-<span class="sourceLineNo">074</span> "hbase.client.meta.max.concurrent.locate.per.table";<a name="line.74"></a>
-<span class="sourceLineNo">075</span><a name="line.75"></a>
-<span class="sourceLineNo">076</span> private static final int DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE = 8;<a name="line.76"></a>
-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span> @VisibleForTesting<a name="line.78"></a>
-<span class="sourceLineNo">079</span> static String LOCATE_PREFETCH_LIMIT = "hbase.client.locate.prefetch.limit";<a name="line.79"></a>
-<span class="sourceLineNo">080</span><a name="line.80"></a>
-<span class="sourceLineNo">081</span> private static final int DEFAULT_LOCATE_PREFETCH_LIMIT = 10;<a name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span> private final AsyncConnectionImpl conn;<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span> private final int maxConcurrentLocateRequestPerTable;<a name="line.85"></a>
-<span class="sourceLineNo">086</span><a name="line.86"></a>
-<span class="sourceLineNo">087</span> private final int locatePrefetchLimit;<a name="line.87"></a>
-<span class="sourceLineNo">088</span><a name="line.88"></a>
-<span class="sourceLineNo">089</span> private final ConcurrentMap<TableName, TableCache> cache = new ConcurrentHashMap<>();<a name="line.89"></a>
-<span class="sourceLineNo">090</span><a name="line.90"></a>
-<span class="sourceLineNo">091</span> private static final class LocateRequest {<a name="line.91"></a>
-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span> private final byte[] row;<a name="line.93"></a>
-<span class="sourceLineNo">094</span><a name="line.94"></a>
-<span class="sourceLineNo">095</span> private final RegionLocateType locateType;<a name="line.95"></a>
-<span class="sourceLineNo">096</span><a name="line.96"></a>
-<span class="sourceLineNo">097</span> public LocateRequest(byte[] row, RegionLocateType locateType) {<a name="line.97"></a>
-<span class="sourceLineNo">098</span> this.row = row;<a name="line.98"></a>
-<span class="sourceLineNo">099</span> this.locateType = locateType;<a name="line.99"></a>
-<span class="sourceLineNo">100</span> }<a name="line.100"></a>
-<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span> @Override<a name="line.102"></a>
-<span class="sourceLineNo">103</span> public int hashCode() {<a name="line.103"></a>
-<span class="sourceLineNo">104</span> return Bytes.hashCode(row) ^ locateType.hashCode();<a name="line.104"></a>
-<span class="sourceLineNo">105</span> }<a name="line.105"></a>
-<span class="sourceLineNo">106</span><a name="line.106"></a>
-<span class="sourceLineNo">107</span> @Override<a name="line.107"></a>
-<span class="sourceLineNo">108</span> public boolean equals(Object obj) {<a name="line.108"></a>
-<span class="sourceLineNo">109</span> if (obj == null || obj.getClass() != LocateRequest.class) {<a name="line.109"></a>
-<span class="sourceLineNo">110</span> return false;<a name="line.110"></a>
-<span class="sourceLineNo">111</span> }<a name="line.111"></a>
-<span class="sourceLineNo">112</span> LocateRequest that = (LocateRequest) obj;<a name="line.112"></a>
-<span class="sourceLineNo">113</span> return locateType.equals(that.locateType) && Bytes.equals(row, that.row);<a name="line.113"></a>
-<span class="sourceLineNo">114</span> }<a name="line.114"></a>
-<span class="sourceLineNo">115</span> }<a name="line.115"></a>
-<span class="sourceLineNo">116</span><a name="line.116"></a>
-<span class="sourceLineNo">117</span> private static final class TableCache {<a name="line.117"></a>
-<span class="sourceLineNo">118</span><a name="line.118"></a>
-<span class="sourceLineNo">119</span> private final ConcurrentNavigableMap<byte[], RegionLocations> cache =<a name="line.119"></a>
-<span class="sourceLineNo">120</span> new ConcurrentSkipListMap<>(BYTES_COMPARATOR);<a name="line.120"></a>
-<span class="sourceLineNo">121</span><a name="line.121"></a>
-<span class="sourceLineNo">122</span> private final Set<LocateRequest> pendingRequests = new HashSet<>();<a name="line.122"></a>
-<span class="sourceLineNo">123</span><a name="line.123"></a>
-<span class="sourceLineNo">124</span> private final Map<LocateRequest, CompletableFuture<RegionLocations>> allRequests =<a name="line.124"></a>
-<span class="sourceLineNo">125</span> new LinkedHashMap<>();<a name="line.125"></a>
-<span class="sourceLineNo">126</span><a name="line.126"></a>
-<span class="sourceLineNo">127</span> public boolean hasQuota(int max) {<a name="line.127"></a>
-<span class="sourceLineNo">128</span> return pendingRequests.size() < max;<a name="line.128"></a>
-<span class="sourceLineNo">129</span> }<a name="line.129"></a>
-<span class="sourceLineNo">130</span><a name="line.130"></a>
-<span class="sourceLineNo">131</span> public boolean isPending(LocateRequest req) {<a name="line.131"></a>
-<span class="sourceLineNo">132</span> return pendingRequests.contains(req);<a name="line.132"></a>
-<span class="sourceLineNo">133</span> }<a name="line.133"></a>
-<span class="sourceLineNo">134</span><a name="line.134"></a>
-<span class="sourceLineNo">135</span> public void send(LocateRequest req) {<a name="line.135"></a>
-<span class="sourceLineNo">136</span> pendingRequests.add(req);<a name="line.136"></a>
-<span class="sourceLineNo">137</span> }<a name="line.137"></a>
-<span class="sourceLineNo">138</span><a name="line.138"></a>
-<span class="sourceLineNo">139</span> public Optional<LocateRequest> getCandidate() {<a name="line.139"></a>
-<span class="sourceLineNo">140</span> return allRequests.keySet().stream().filter(r -> !isPending(r)).findFirst();<a name="line.140"></a>
-<span class="sourceLineNo">141</span> }<a name="line.141"></a>
-<span class="sourceLineNo">142</span><a name="line.142"></a>
-<span class="sourceLineNo">143</span> public void clearCompletedRequests(Optional<RegionLocations> locations) {<a name="line.143"></a>
-<span class="sourceLineNo">144</span> for (Iterator<Map.Entry<LocateRequest, CompletableFuture<RegionLocations>>> iter =<a name="line.144"></a>
-<span class="sourceLineNo">145</span> allRequests.entrySet().iterator(); iter.hasNext();) {<a name="line.145"></a>
-<span class="sourceLineNo">146</span> Map.Entry<LocateRequest, CompletableFuture<RegionLocations>> entry = iter.next();<a name="line.146"></a>
-<span class="sourceLineNo">147</span> if (tryComplete(entry.getKey(), entry.getValue(), locations)) {<a name="line.147"></a>
-<span class="sourceLineNo">148</span> iter.remove();<a name="line.148"></a>
-<span class="sourceLineNo">149</span> }<a name="line.149"></a>
-<span class="sourceLineNo">150</span> }<a name="line.150"></a>
-<span class="sourceLineNo">151</span> }<a name="line.151"></a>
-<span class="sourceLineNo">152</span><a name="line.152"></a>
-<span class="sourceLineNo">153</span> private boolean tryComplete(LocateRequest req, CompletableFuture<RegionLocations> future,<a name="line.153"></a>
-<span class="sourceLineNo">154</span> Optional<RegionLocations> locations) {<a name="line.154"></a>
-<span class="sourceLineNo">155</span> if (future.isDone()) {<a name="line.155"></a>
-<span class="sourceLineNo">156</span> return true;<a name="line.156"></a>
-<span class="sourceLineNo">157</span> }<a name="line.157"></a>
-<span class="sourceLineNo">158</span> if (!locations.isPresent()) {<a name="line.158"></a>
-<span class="sourceLineNo">159</span> return false;<a name="line.159"></a>
-<span class="sourceLineNo">160</span> }<a name="line.160"></a>
-<span class="sourceLineNo">161</span> RegionLocations locs = locations.get();<a name="line.161"></a>
-<span class="sourceLineNo">162</span> HRegionLocation loc = ObjectUtils.firstNonNull(locs.getRegionLocations());<a name="line.162"></a>
-<span class="sourceLineNo">163</span> // we should at least have one location available, otherwise the request should fail and<a name="line.163"></a>
-<span class="sourceLineNo">164</span> // should not arrive here<a name="line.164"></a>
-<span class="sourceLineNo">165</span> assert loc != null;<a name="line.165"></a>
-<span class="sourceLineNo">166</span> boolean completed;<a name="line.166"></a>
-<span class="sourceLineNo">167</span> if (req.locateType.equals(RegionLocateType.BEFORE)) {<a name="line.167"></a>
-<span class="sourceLineNo">168</span> // for locating the row before current row, the common case is to find the previous region<a name="line.168"></a>
-<span class="sourceLineNo">169</span> // in reverse scan, so we check the endKey first. In general, the condition should be<a name="line.169"></a>
-<span class="sourceLineNo">170</span> // startKey < req.row and endKey >= req.row. Here we split it to endKey == req.row ||<a name="line.170"></a>
-<span class="sourceLineNo">171</span> // (endKey > req.row && startKey < req.row). The two conditions are equal since startKey <<a name="line.171"></a>
-<span class="sourceLineNo">172</span> // endKey.<a name="line.172"></a>
-<span class="sourceLineNo">173</span> int c = Bytes.compareTo(loc.getRegion().getEndKey(), req.row);<a name="line.173"></a>
-<span class="sourceLineNo">174</span> completed =<a name="line.174"></a>
-<span class="sourceLineNo">175</span> c == 0 || (c > 0 && Bytes.compareTo(loc.getRegion().getStartKey(), req.row) < 0);<a name="line.175"></a>
-<span class="sourceLineNo">176</span> } else {<a name="line.176"></a>
-<span class="sourceLineNo">177</span> completed = loc.getRegion().containsRow(req.row);<a name="line.177"></a>
-<span class="sourceLineNo">178</span> }<a name="line.178"></a>
-<span class="sourceLineNo">179</span> if (completed) {<a name="line.179"></a>
-<span class="sourceLineNo">180</span> future.complete(locs);<a name="line.180"></a>
-<span class="sourceLineNo">181</span> return true;<a name="line.181"></a>
-<span class="sourceLineNo">182</span> } else {<a name="line.182"></a>
-<span class="sourceLineNo">183</span> return false;<a name="line.183"></a>
-<span class="sourceLineNo">184</span> }<a name="line.184"></a>
-<span class="sourceLineNo">185</span> }<a name="line.185"></a>
-<span class="sourceLineNo">186</span> }<a name="line.186"></a>
-<span class="sourceLineNo">187</span><a name="line.187"></a>
-<span class="sourceLineNo">188</span> AsyncNonMetaRegionLocator(AsyncConnectionImpl conn) {<a name="line.188"></a>
-<span class="sourceLineNo">189</span> this.conn = conn;<a name="line.189"></a>
-<span class="sourceLineNo">190</span> this.maxConcurrentLocateRequestPerTable = conn.getConfiguration().getInt(<a name="line.190"></a>
-<span class="sourceLineNo">191</span> MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE, DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE);<a name="line.191"></a>
-<span class="sourceLineNo">192</span> this.locatePrefetchLimit =<a name="line.192"></a>
-<span class="sourceLineNo">193</span> conn.getConfiguration().getInt(LOCATE_PREFETCH_LIMIT, DEFAULT_LOCATE_PREFETCH_LIMIT);<a name="line.193"></a>
-<span class="sourceLineNo">194</span> }<a name="line.194"></a>
-<span class="sourceLineNo">195</span><a name="line.195"></a>
-<span class="sourceLineNo">196</span> private TableCache getTableCache(TableName tableName) {<a name="line.196"></a>
-<span class="sourceLineNo">197</span> return computeIfAbsent(cache, tableName, TableCache::new);<a name="line.197"></a>
-<span class="sourceLineNo">198</span> }<a name="line.198"></a>
-<span class="sourceLineNo">199</span><a name="line.199"></a>
-<span class="sourceLineNo">200</span> private boolean isEqual(RegionLocations locs1, RegionLocations locs2) {<a name="line.200"></a>
-<span class="sourceLineNo">201</span> HRegionLocation[] locArr1 = locs1.getRegionLocations();<a name="line.201"></a>
-<span class="sourceLineNo">202</span> HRegionLocation[] locArr2 = locs2.getRegionLocations();<a name="line.202"></a>
-<span class="sourceLineNo">203</span> if (locArr1.length != locArr2.length) {<a name="line.203"></a>
-<span class="sourceLineNo">204</span> return false;<a name="line.204"></a>
-<span class="sourceLineNo">205</span> }<a name="line.205"></a>
-<span class="sourceLineNo">206</span> for (int i = 0; i < locArr1.length; i++) {<a name="line.206"></a>
-<span class="sourceLineNo">207</span> // do not need to compare region info<a name="line.207"></a>
-<span class="sourceLineNo">208</span> HRegionLocation loc1 = locArr1[i];<a name="line.208"></a>
-<span class="sourceLineNo">209</span> HRegionLocation loc2 = locArr2[i];<a name="line.209"></a>
-<span class="sourceLineNo">210</span> if (loc1 == null) {<a name="line.210"></a>
-<span class="sourceLineNo">211</span> if (loc2 != null) {<a name="line.211"></a>
-<span class="sourceLineNo">212</span> return false;<a name="line.212"></a>
-<span class="sourceLineNo">213</span> }<a name="line.213"></a>
-<span class="sourceLineNo">214</span> } else {<a name="line.214"></a>
-<span class="sourceLineNo">215</span> if (loc2 == null) {<a name="line.215"></a>
-<span class="sourceLineNo">216</span> return false;<a name="line.216"></a>
-<span class="sourceLineNo">217</span> }<a name="line.217"></a>
-<span class="sourceLineNo">218</span> if (loc1.getSeqNum() != loc2.getSeqNum()) {<a name="line.218"></a>
-<span class="sourceLineNo">219</span> return false;<a name="line.219"></a>
-<span class="sourceLineNo">220</span> }<a name="line.220"></a>
-<span class="sourceLineNo">221</span> if (Objects.equal(loc1.getServerName(), loc2.getServerName())) {<a name="line.221"></a>
-<span class="sourceLineNo">222</span> return false;<a name="line.222"></a>
-<span class="sourceLineNo">223</span> }<a name="line.223"></a>
-<span class="sourceLineNo">224</span> }<a name="line.224"></a>
-<span class="sourceLineNo">225</span> }<a name="line.225"></a>
-<span class="sourceLineNo">226</span> return true;<a name="line.226"></a>
-<span class="sourceLineNo">227</span> }<a name="line.227"></a>
-<span class="sourceLineNo">228</span><a name="line.228"></a>
-<span class="sourceLineNo">229</span> // return whether we add this loc to cache<a name="line.229"></a>
-<span class="sourceLineNo">230</span> private boolean addToCache(TableCache tableCache, RegionLocations locs) {<a name="line.230"></a>
+<span class="sourceLineNo">026</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.removeRegionLocation;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import static org.apache.hadoop.hbase.client.RegionInfo.createRegionName;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import static org.apache.hadoop.hbase.util.Bytes.BYTES_COMPARATOR;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;<a name="line.31"></a>
+<span class="sourceLineNo">032</span><a name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.io.IOException;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.Arrays;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import java.util.HashSet;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import java.util.Iterator;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import java.util.LinkedHashMap;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import java.util.Map;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import java.util.Optional;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import java.util.Set;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import java.util.concurrent.CompletableFuture;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentMap;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentNavigableMap;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentSkipListMap;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.commons.lang3.ObjectUtils;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.HConstants;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.TableName;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.TableNotFoundException;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.client.Scan.ReadType;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.slf4j.Logger;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.slf4j.LoggerFactory;<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hbase.thirdparty.com.google.common.base.Objects;<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>/**<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * The asynchronous locator for regions other than meta.<a name="line.64"></a>
+<span class="sourceLineNo">065</span> */<a name="line.65"></a>
+<span class="sourceLineNo">066</span>@InterfaceAudience.Private<a name="line.66"></a>
+<span class="sourceLineNo">067</span>class AsyncNonMetaRegionLocator {<a name="line.67"></a>
+<span class="sourceLineNo">068</span><a name="line.68"></a>
+<span class="sourceLineNo">069</span> private static final Logger LOG = LoggerFactory.getLogger(AsyncNonMetaRegionLocator.class);<a name="line.69"></a>
+<span class="sourceLineNo">070</span><a name="line.70"></a>
+<span class="sourceLineNo">071</span> @VisibleForTesting<a name="line.71"></a>
+<span class="sourceLineNo">072</span> static final String MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE =<a name="line.72"></a>
+<span class="sourceLineNo">073</span> "hbase.client.meta.max.concurrent.locate.per.table";<a name="line.73"></a>
+<span class="sourceLineNo">074</span><a name="line.74"></a>
+<span class="sourceLineNo">075</span> private static final int DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE = 8;<a name="line.75"></a>
+<span class="sourceLineNo">076</span><a name="line.76"></a>
+<span class="sourceLineNo">077</span> @VisibleForTesting<a name="line.77"></a>
+<span class="sourceLineNo">078</span> static String LOCATE_PREFETCH_LIMIT = "hbase.client.locate.prefetch.limit";<a name="line.78"></a>
+<span class="sourceLineNo">079</span><a name="line.79"></a>
+<span class="sourceLineNo">080</span> private static final int DEFAULT_LOCATE_PREFETCH_LIMIT = 10;<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span> private final AsyncConnectionImpl conn;<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span> private final int maxConcurrentLocateRequestPerTable;<a name="line.84"></a>
+<span class="sourceLineNo">085</span><a name="line.85"></a>
+<span class="sourceLineNo">086</span> private final int locatePrefetchLimit;<a name="line.86"></a>
+<span class="sourceLineNo">087</span><a name="line.87"></a>
+<span class="sourceLineNo">088</span> private final ConcurrentMap<TableName, TableCache> cache = new ConcurrentHashMap<>();<a name="line.88"></a>
+<span class="sourceLineNo">089</span><a name="line.89"></a>
+<span class="sourceLineNo">090</span> private static final class LocateRequest {<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span> private final byte[] row;<a name="line.92"></a>
+<span class="sourceLineNo">093</span><a name="line.93"></a>
+<span class="sourceLineNo">094</span> private final RegionLocateType locateType;<a name="line.94"></a>
+<span class="sourceLineNo">095</span><a name="line.95"></a>
+<span class="sourceLineNo">096</span> public LocateRequest(byte[] row, RegionLocateType locateType) {<a name="line.96"></a>
+<span class="sourceLineNo">097</span> this.row = row;<a name="line.97"></a>
+<span class="sourceLineNo">098</span> this.locateType = locateType;<a name="line.98"></a>
+<span class="sourceLineNo">099</span> }<a name="line.99"></a>
+<span class="sourceLineNo">100</span><a name="line.100"></a>
+<span class="sourceLineNo">101</span> @Override<a name="line.101"></a>
+<span class="sourceLineNo">102</span> public int hashCode() {<a name="line.102"></a>
+<span class="sourceLineNo">103</span> return Bytes.hashCode(row) ^ locateType.hashCode();<a name="line.103"></a>
+<span class="sourceLineNo">104</span> }<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span> @Override<a name="line.106"></a>
+<span class="sourceLineNo">107</span> public boolean equals(Object obj) {<a name="line.107"></a>
+<span class="sourceLineNo">108</span> if (obj == null || obj.getClass() != LocateRequest.class) {<a name="line.108"></a>
+<span class="sourceLineNo">109</span> return false;<a name="line.109"></a>
+<span class="sourceLineNo">110</span> }<a name="line.110"></a>
+<span class="sourceLineNo">111</span> LocateRequest that = (LocateRequest) obj;<a name="line.111"></a>
+<span class="sourceLineNo">112</span> return locateType.equals(that.locateType) && Bytes.equals(row, that.row);<a name="line.112"></a>
+<span class="sourceLineNo">113</span> }<a name="line.113"></a>
+<span class="sourceLineNo">114</span> }<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span> private static final class TableCache {<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> private final ConcurrentNavigableMap<byte[], RegionLocations> cache =<a name="line.118"></a>
+<span class="sourceLineNo">119</span> new ConcurrentSkipListMap<>(BYTES_COMPARATOR);<a name="line.119"></a>
+<span class="sourceLineNo">120</span><a name="line.120"></a>
+<span class="sourceLineNo">121</span> private final Set<LocateRequest> pendingRequests = new HashSet<>();<a name="line.121"></a>
+<span class="sourceLineNo">122</span><a name="line.122"></a>
+<span class="sourceLineNo">123</span> private final Map<LocateRequest, CompletableFuture<RegionLocations>> allRequests =<a name="line.123"></a>
+<span class="sourceLineNo">124</span> new LinkedHashMap<>();<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span> public boolean hasQuota(int max) {<a name="line.126"></a>
+<span class="sourceLineNo">127</span> return pendingRequests.size() < max;<a name="line.127"></a>
+<span class="sourceLineNo">128</span> }<a name="line.128"></a>
+<span class="sourceLineNo">129</span><a name="line.129"></a>
+<span class="sourceLineNo">130</span> public boolean isPending(LocateRequest req) {<a name="line.130"></a>
+<span class="sourceLineNo">131</span> return pendingRequests.contains(req);<a name="line.131"></a>
+<span class="sourceLineNo">132</span> }<a name="line.132"></a>
+<span class="sourceLineNo">133</span><a name="line.133"></a>
+<span class="sourceLineNo">134</span> public void send(LocateRequest req) {<a name="line.134"></a>
+<span class="sourceLineNo">135</span> pendingRequests.add(req);<a name="line.135"></a>
+<span class="sourceLineNo">136</span> }<a name="line.136"></a>
+<span class="sourceLineNo">137</span><a name="line.137"></a>
+<span class="sourceLineNo">138</span> public Optional<LocateRequest> getCandidate() {<a name="line.138"></a>
+<span class="sourceLineNo">139</span> return allRequests.keySet().stream().filter(r -> !isPending(r)).findFirst();<a name="line.139"></a>
+<span class="sourceLineNo">140</span> }<a name="line.140"></a>
+<span class="sourceLineNo">141</span><a name="line.141"></a>
+<span class="sourceLineNo">142</span> public void clearCompletedRequests(Optional<RegionLocations> locations) {<a name="line.142"></a>
+<span class="sourceLineNo">143</span> for (Iterator<Map.Entry<LocateRequest, CompletableFuture<RegionLocations>>> iter =<a name="line.143"></a>
+<span class="sourceLineNo">144</span> allRequests.entrySet().iterator(); iter.hasNext();) {<a name="line.144"></a>
+<span class="sourceLineNo">145</span> Map.Entry<LocateRequest, CompletableFuture<RegionLocations>> entry = iter.next();<a name="line.145"></a>
+<span class="sourceLineNo">146</span> if (tryComplete(entry.getKey(), entry.getValue(), locations)) {<a name="line.146"></a>
+<span class="sourceLineNo">147</span> iter.remove();<a name="line.147"></a>
+<span class="sourceLineNo">148</span> }<a name="line.148"></a>
+<span class="sourceLineNo">149</span> }<a name="line.149"></a>
+<span class="sourceLineNo">150</span> }<a name="line.150"></a>
+<span class="sourceLineNo">151</span><a name="line.151"></a>
+<span class="sourceLineNo">152</span> private boolean tryComplete(LocateRequest req, CompletableFuture<RegionLocations> future,<a name="line.152"></a>
+<span class="sourceLineNo">153</span> Optional<RegionLocations> locations) {<a name="line.153"></a>
+<span class="sourceLineNo">154</span> if (future.isDone()) {<a name="line.154"></a>
+<span class="sourceLineNo">155</span> return true;<a name="line.155"></a>
+<span class="sourceLineNo">156</span> }<a name="line.156"></a>
+<span class="sourceLineNo">157</span> if (!locations.isPresent()) {<a name="line.157"></a>
+<span class="sourceLineNo">158</span> return false;<a name="line.158"></a>
+<span class="sourceLineNo">159</span> }<a name="line.159"></a>
+<span class="sourceLineNo">160</span> RegionLocations locs = locations.get();<a name="line.160"></a>
+<span class="sourceLineNo">161</span> HRegionLocation loc = ObjectUtils.firstNonNull(locs.getRegionLocations());<a name="line.161"></a>
+<span class="sourceLineNo">162</span> // we should at least have one location available, otherwise the request should fail and<a name="line.162"></a>
+<span class="sourceLineNo">163</span> // should not arrive here<a name="line.163"></a>
+<span class="sourceLineNo">164</span> assert loc != null;<a name="line.164"></a>
+<span class="sourceLineNo">165</span> boolean completed;<a name="line.165"></a>
+<span class="sourceLineNo">166</span> if (req.locateType.equals(RegionLocateType.BEFORE)) {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> // for locating the row before current row, the common case is to find the previous region<a name="line.167"></a>
+<span class="sourceLineNo">168</span> // in reverse scan, so we check the endKey first. In general, the condition should be<a name="line.168"></a>
+<span class="sourceLineNo">169</span> // startKey < req.row and endKey >= req.row. Here we split it to endKey == req.row ||<a name="line.169"></a>
+<span class="sourceLineNo">170</span> // (endKey > req.row && startKey < req.row). The two conditions are equal since startKey <<a name="line.170"></a>
+<span class="sourceLineNo">171</span> // endKey.<a name="line.171"></a>
+<span class="sourceLineNo">172</span> int c = Bytes.compareTo(loc.getRegion().getEndKey(), req.row);<a name="line.172"></a>
+<span class="sourceLineNo">173</span> completed =<a name="line.173"></a>
+<span class="sourceLineNo">174</span> c == 0 || (c > 0 && Bytes.compareTo(loc.getRegion().getStartKey(), req.row) < 0);<a name="line.174"></a>
+<span class="sourceLineNo">175</span> } else {<a name="line.175"></a>
+<span class="sourceLineNo">176</span> completed = loc.getRegion().containsRow(req.row);<a name="line.176"></a>
+<span class="sourceLineNo">177</span> }<a name="line.177"></a>
+<span class="sourceLineNo">178</span> if (completed) {<a name="line.178"></a>
+<span class="sourceLineNo">179</span> future.complete(locs);<a name="line.179"></a>
+<span class="sourceLineNo">180</span> return true;<a name="line.180"></a>
+<span class="sourceLineNo">181</span> } else {<a name="line.181"></a>
+<span class="sourceLineNo">182</span> return false;<a name="line.182"></a>
+<span class="sourceLineNo">183</span> }<a name="line.183"></a>
+<span class="sourceLineNo">184</span> }<a name="line.184"></a>
+<span class="sourceLineNo">185</span> }<a name="line.185"></a>
+<span class="sourceLineNo">186</span><a name="line.186"></a>
+<span class="sourceLineNo">187</span> AsyncNonMetaRegionLocator(AsyncConnectionImpl conn) {<a name="line.187"></a>
+<span class="sourceLineNo">188</span> this.conn = conn;<a name="line.188"></a>
+<span class="sourceLineNo">189</span> this.maxConcurrentLocateRequestPerTable = conn.getConfiguration().getInt(<a name="line.189"></a>
+<span class="sourceLineNo">190</span> MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE, DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE);<a name="line.190"></a>
+<span class="sourceLineNo">191</span> this.locatePrefetchLimit =<a name="line.191"></a>
+<span class="sourceLineNo">192</span> conn.getConfiguration().getInt(LOCATE_PREFETCH_LIMIT, DEFAULT_LOCATE_PREFETCH_LIMIT);<a name="line.192"></a>
+<span class="sourceLineNo">193</span> }<a name="line.193"></a>
+<span class="sourceLineNo">194</span><a name="line.194"></a>
+<span class="sourceLineNo">195</span> private TableCache getTableCache(TableName tableName) {<a name="line.195"></a>
+<span class="sourceLineNo">196</span> return computeIfAbsent(cache, tableName, TableCache::new);<a name="line.196"></a>
+<span class="sourceLineNo">197</span> }<a name="line.197"></a>
+<span class="sourceLineNo">198</span><a name="line.198"></a>
+<span class="sourceLineNo">199</span> private boolean isEqual(RegionLocations locs1, RegionLocations locs2) {<a name="line.199"></a>
+<span class="sourceLineNo">200</span> HRegionLocation[] locArr1 = locs1.getRegionLocations();<a name="line.200"></a>
+<span class="sourceLineNo">201</span> HRegionLocation[] locArr2 = locs2.getRegionLocations();<a name="line.201"></a>
+<span class="sourceLineNo">202</span> if (locArr1.length != locArr2.length) {<a name="line.202"></a>
+<span class="sourceLineNo">203</span> return false;<a name="line.203"></a>
+<span class="sourceLineNo">204</span> }<a name="line.204"></a>
+<span class="sourceLineNo">205</span> for (int i = 0; i < locArr1.length; i++) {<a name="line.205"></a>
+<span class="sourceLineNo">206</span> // do not need to compare region info<a name="line.206"></a>
+<span class="sourceLineNo">207</span> HRegionLocation loc1 = locArr1[i];<a name="line.207"></a>
+<span class="sourceLineNo">208</span> HRegionLocation loc2 = locArr2[i];<a name="line.208"></a>
+<span class="sourceLineNo">209</span> if (loc1 == null) {<a name="line.209"></a>
+<span class="sourceLineNo">210</span> if (loc2 != null) {<a name="line.210"></a>
+<span class="sourceLineNo">211</span> return false;<a name="line.211"></a>
+<span class="sourceLineNo">212</span> }<a name="line.212"></a>
+<span class="sourceLineNo">213</span> } else {<a name="line.213"></a>
+<span class="sourceLineNo">214</span> if (loc2 == null) {<a name="line.214"></a>
+<span class="sourceLineNo">215</span> return false;<a name="line.215"></a>
+<span class="sourceLineNo">216</span> }<a name="line.216"></a>
+<span class="sourceLineNo">217</span> if (loc1.getSeqNum() != loc2.getSeqNum()) {<a name="line.217"></a>
+<span class="sourceLineNo">218</span> return false;<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span> if (!Objects.equal(loc1.getServerName(), loc2.getServerName())) {<a name="line.220"></a>
+<span class="sourceLineNo">221</span> return false;<a name="line.221"></a>
+<span class="sourceLineNo">222</span> }<a name="line.222"></a>
+<span class="sourceLineNo">223</span> }<a name="line.223"></a>
+<span class="sourceLineNo">224</span> }<a name="line.224"></a>
+<span class="sourceLineNo">225</span> return true;<a name="line.225"></a>
+<span class="sourceLineNo">226</span> }<a name="line.226"></a>
+<span class="sourceLineNo">227</span><a name="line.227"></a>
+<span class="sourceLineNo">228</span> // if we successfully add the locations to cache, return the locations, otherwise return the one<a name="line.228"></a>
+<span class="sourceLineNo">229</span> // which prevents us being added. The upper layer can use this value to complete pending requests.<a name="line.229"></a>
+<span class="sourceLineNo">230</span> private RegionLocations addToCache(TableCache tableCache, RegionLocations locs) {<a name="line.230"></a>
<span class="sourceLineNo">231</span> LOG.trace("Try adding {} to cache", locs);<a name="line.231"></a>
<span class="sourceLineNo">232</span> byte[] startKey = locs.getDefaultRegionLocation().getRegion().getStartKey();<a name="line.232"></a>
<span class="sourceLineNo">233</span> for (;;) {<a name="line.233"></a>
<span class="sourceLineNo">234</span> RegionLocations oldLocs = tableCache.cache.putIfAbsent(startKey, locs);<a name="line.234"></a>
<span class="sourceLineNo">235</span> if (oldLocs == null) {<a name="line.235"></a>
-<span class="sourceLineNo">236</span> return true;<a name="line.236"></a>
+<span class="sourceLineNo">236</span> return locs;<a name="line.236"></a>
<span class="sourceLineNo">237</span> }<a name="line.237"></a>
-<span class="sourceLineNo">238</span> RegionLocations mergedLocs = mergeRegionLocations(locs, oldLocs);<a name="line.238"></a>
-<span class="sourceLineNo">239</span> if (isEqual(mergedLocs, oldLocs)) {<a name="line.239"></a>
-<span class="sourceLineNo">240</span> // the merged one is the same with the old one, give up<a name="line.240"></a>
-<span class="sourceLineNo">241</span> LOG.trace("Will not add {} to cache because the old value {} " +<a name="line.241"></a>
-<span class="sourceLineNo">242</span> " is newer than us or has the same server name." +<a name="line.242"></a>
-<span class="sourceLineNo">243</span> " Maybe it is updated before we replace it", locs, oldLocs);<a name="line.243"></a>
-<span class="sourceLineNo">244</span> return false;<a name="line.244"></a>
-<span class="sourceLineNo">245</span> }<a name="line.245"></a>
-<span class="sourceLineNo">246</span> if (tableCache.cache.replace(startKey, oldLocs, mergedLocs)) {<a name="line.246"></a>
-<span class="sourceLineNo">247</span> return true;<a name="line.247"></a>
-<span class="sourceLineNo">248</span> }<a name="line.248"></a>
-<span class="sourceLineNo">249</span> }<a name="line.249"></a>
-<span class="sourceLineNo">250</span> }<a name="line.250"></a>
-<span class="sourceLineNo">251</span><a name="line.251"></a>
-<span class="sourceLineNo">252</span> private void complete(TableName tableName, LocateRequest req, RegionLocations locs,<a name="line.252"></a>
-<span class="sourceLineNo">253</span> Throwable error) {<a name="line.253"></a>
-<span class="sourceLineNo">254</span> if (error != null) {<a name="line.254"></a>
-<span class="sourceLineNo">255</span> LOG.warn("Failed to locate region in '" + tableName + "', row='" +<a name="line.255"></a>
-<span class="sourceLineNo">256</span> Bytes.toStringBinary(req.row) + "', locateType=" + req.locateType, error);<a name="line.256"></a>
-<span class="sourceLineNo">257</span> }<a name="line.257"></a>
-<span class="sourceLineNo">258</span> Optional<LocateRequest> toSend = Optional.empty();<a name="line.258"></a>
-<span class="sourceLineNo">259</span> TableCache tableCache = getTableCache(tableName);<a name="line.259"></a>
-<span class="sourceLineNo">260</span> if (locs != null) {<a name="line.260"></a>
-<span class="sourceLineNo">261</span> if (!addToCache(tableCache, locs)) {<a name="line.261"></a>
-<span class="sourceLineNo">262</span> // someone is ahead of us.<a name="line.262"></a>
-<span class="sourceLineNo">263</span> synchronized (tableCache) {<a name="line.263"></a>
-<span class="sourceLineNo">264</span> tableCache.pendingRequests.remove(req);<a name="line.264"></a>
-<span class="sourceLineNo">265</span> tableCache.clearCompletedRequests(Optional.empty());<a name="line.265"></a>
-<span class="sourceLineNo">266</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.266"></a>
-<span class="sourceLineNo">267</span> // quota to send a candidate request.<a name="line.267"></a>
-<span class="sourceLineNo">268</span> toSend = tableCache.getCandidate();<a name="line.268"></a>
-<span class="sourceLineNo">269</span> toSend.ifPresent(r -> tableCache.send(r));<a name="line.269"></a>
-<span class="sourceLineNo">270</span> }<a name="line.270"></a>
-<span class="sourceLineNo">271</span> toSend.ifPresent(r -> locateInMeta(tableName, r));<a name="line.271"></a>
-<span class="sourceLineNo">272</span> return;<a name="line.272"></a>
-<span class="sourceLineNo">273</span> }<a name="line.273"></a>
-<span class="sourceLineNo">274</span> }<a name="line.274"></a>
-<span class="sourceLineNo">275</span> synchronized (tableCache) {<a name="line.275"></a>
-<span class="sourceLineNo">276</span> tableCache.pendingRequests.remove(req);<a name="line.276"></a>
-<span class="sourceLineNo">277</span> if (error != null) {<a name="line.277"></a>
-<span class="sourceLineNo">278</span> // fail the request itself, no matter whether it is a DoNotRetryIOException, as we have<a name="line.278"></a>
-<span class="sourceLineNo">279</span> // already retried several times<a name="line.279"></a>
-<span class="sourceLineNo">280</span> CompletableFuture<?> future = tableCache.allRequests.remove(req);<a name="line.280"></a>
-<span class="sourceLineNo">281</span> if (future != null) {<a name="line.281"></a>
-<span class="sourceLineNo">282</span> future.completeExceptionally(error);<a name="line.282"></a>
-<span class="sourceLineNo">283</span> }<a name="line.283"></a>
-<span class="sourceLineNo">284</span> }<a name="line.284"></a>
-<span class="sourceLineNo">285</span> tableCache.clearCompletedRequests(Optional.ofNullable(locs));<a name="line.285"></a>
-<span class="sourceLineNo">286</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.286"></a>
-<span class="sourceLineNo">287</span> // quota to send a candidate request.<a name="line.287"></a>
-<span class="sourceLineNo">288</span> toSend = tableCache.getCandidate();<a name="line.288"></a>
-<span class="sourceLineNo">289</span> toSend.ifPresent(r -> tableCache.send(r));<a name="line.289"></a>
-<span class="sourceLineNo">290</span> }<a name="line.290"></a>
-<span class="sourceLineNo">291</span> toSend.ifPresent(r -> locateInMeta(tableName, r));<a name="line.291"></a>
-<span class="sourceLineNo">292</span> }<a name="line.292"></a>
-<span class="sourceLineNo">293</span><a name="line.293"></a>
-<span class="sourceLineNo">294</span> // return whether we should stop the scan<a name="line.294"></a>
-<span class="sourceLineNo">295</span> private boolean onScanNext(TableName tableName, LocateRequest req, Result result) {<a name="line.295"></a>
-<span class="sourceLineNo">296</span> RegionLocations locs = MetaTableAccessor.getRegionLocations(result);<a name="line.296"></a>
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-<span class="sourceLineNo">298</span> LOG.debug("The fetched location of '{}', row='{}', locateType={} is {}", tableName,<a name="line.298"></a>
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-<span class="sourceLineNo">545</span><a name="line.545"></a>
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-<span class="sourceLineNo">551</span> RegionLocations locs = tableCache.cache.get(loc.getRegion().getStartKey());<a name="line.551"></a>
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+<span class="sourceLineNo">238</span> // check whether the regions are the same, this usually happens when table is split/merged, or<a name="line.238"></a>
+<span class="sourceLineNo">239</span> // deleted and recreated again.<a name="line.239"></a>
+<span class="sourceLineNo">240</span> RegionInfo region = locs.getRegionLocation().getRegion();<a name="line.240"></a>
+<span class="sourceLineNo">241</span> RegionInfo oldRegion = oldLocs.getRegionLocation().getRegion();<a name="line.241"></a>
+<span class="sourceLineNo">242</span> if (region.getEncodedName().equals(oldRegion.getEncodedName())) {<a name="line.242"></a>
+<span class="sourceLineNo">243</span> RegionLocations mergedLocs = oldLocs.mergeLocations(locs);<a name="line.243"></a>
+<span class="sourceLineNo">244</span> if (isEqual(mergedLocs, oldLocs)) {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> // the merged one is the same with the old one, give up<a name="line.245"></a>
+<span class="sourceLineNo">246</span> LOG.trace("Will not add {} to cache because the old value {} " +<a name="line.246"></a>
+<span class="sourceLineNo">247</span> " is newer than us or has the same server name." +<a name="line.247"></a>
+<span class="sourceLineNo">248</span> " Maybe it is updated before we replace it", locs, oldLocs);<a name="line.248"></a>
+<span class="sourceLineNo">249</span> return oldLocs;<a name="line.249"></a>
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+<span class="sourceLineNo">251</span> if (tableCache.cache.replace(startKey, oldLocs, mergedLocs)) {<a name="line.251"></a>
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+<span class="sourceLineNo">256</span> // the upper layer can detect this and trigger removal of the wrong locations<a name="line.256"></a>
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+<span class="sourceLineNo">258</span> LOG.debug("The newnly fetch region {} is different from the old one {} for row '{}'," +<a name="line.258"></a>
+<span class="sourceLineNo">259</span> " try replaing the old one...", region, oldRegion, Bytes.toStringBinary(startKey));<a name="line.259"></a>
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+<span class="sourceLineNo">264</span> }<a name="line.264"></a>
+<span class="sourceLineNo">265</span> }<a name="line.265"></a>
+<span class="sourceLineNo">266</span> }<a name="line.266"></a>
+<span class="sourceLineNo">267</span><a name="line.267"></a>
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+<span class="sourceLineNo">272</span> Bytes.toStringBinary(req.row) + "', locateType=" + req.locateType, error);<a name="line.272"></a>
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+<span class="sourceLineNo">274</span> Optional<LocateRequest> toSend = Optional.empty();<a name="line.274"></a>
+<span class="sourceLineNo">275</span> TableCache tableCache = getTableCache(tableName);<a name="line.275"></a>
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+<span class="sourceLineNo">280</span> tableCache.clearCompletedRequests(Optional.of(addedLocs));<a name="line.280"></a>
+<span class="sourceLineNo">281</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.281"></a>
+<span class="sourceLineNo">282</span> // quota to send a candidate request.<a name="line.282"></a>
+<span class="sourceLineNo">283</span> toSend = tableCache.getCandidate();<a name="line.283"></a>
+<span class="sourceLineNo">284</span> toSend.ifPresent(r -> tableCache.send(r));<a name="line.284"></a>
+<span class="sourceLineNo">285</span> }<a name="line.285"></a>
+<span class="sourceLineNo">286</span> toSend.ifPresent(r -> locateInMeta(tableName, r));<a name="line.286"></a>
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+<span class="sourceLineNo">292</span> // fail the request itself, no matter whether it is a DoNotRetryIOException, as we have<a name="line.292"></a>
+<span class="sourceLineNo">293</span> // already retried several times<a name="line.293"></a>
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+<span class="sourceLineNo">295</span> if (future != null) {<a name="line.295"></a>
+<span class="sourceLineNo">296</span> future.completeExceptionally(error);<a name="line.296"></a>
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+<span class="sourceLineNo">299</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.299"></a>
+<span class="sourceLineNo">300</span> // quota to send a candidate request.<a name="line.300"></a>
+<span class="sourceLineNo">301</span> toSend = tableCache.getCandidate();<a name="line.301"></a>
+<span class="sourceLineNo">302</span> toSend.ifPresent(r -> tableCache.send(r));<a name="line.302"></a>
+<span class="sourceLineNo">303</span> }<a name="line.303"></a>
+<span class="sourceLineNo">304</span> toSend.ifPresent(r -> locateInMeta(tableName, r));<a name="line.304"></a>
+<span class="sourceLineNo">305</span> }<a name="line.305"></a>
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+<span class="sourceLineNo">307</span><a name="line.307"></a>
+<span class="sourceLineNo">308</span> // return whether we should stop the scan<a name="line.308"></a>
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+<span class="sourceLineNo">311</span> if (LOG.isDebugEnabled()) {<a name="line.311"></a>
+<span class="sourceLineNo">312</span> LOG.debug("The fetched location of '{}', row='{}', locateType={} is {}", tableName,<a name="line.312"></a>
+<span class="sourceLineNo">313</span> Bytes.toStringBinary(req.row), req.locateType, locs);<a name="line.313"></a>
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+<span class="sourceLineNo">315</span><a name="line.315"></a>
+<span class="sourceLineNo">316</span> // the default region location should always be presented when fetching from meta, otherwise<a name="line.316"></a>
+<span class="sourceLineNo">317</span> // let's fail the request.<a name="line.317"></a>
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+<span class="sourceLineNo">319</span> complete(tableName, req, null,<a name="line.319"></a>
+<span class="sourceLineNo">320</span> new HBaseIOException(String.format("No location found for '%s', row='%s', locateType=%s",<a name="line.320"></a>
+<span class="sourceLineNo">321</span> tableName, Bytes.toStringBinary(req.row), req.locateType)));<a name="line.321"></a>
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+<span class="sourceLineNo">324</span> HRegionLocation loc = locs.getDefaultRegionLocation();<a name="line.324"></a>
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+<span class="sourceLineNo">328</span> new HBaseIOException(String.format("HRegionInfo is null for '%s', row='%s', locateType=%s",<a name="line.328"></a>
+<span class="sourceLineNo">329</span> tableName, Bytes.toStringBinary(req.row), req.locateType)));<a name="line.329"></a>
+<span class="sourceLineNo">330</span> return true;<a name="line.330"></a>
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+<span class="sourceLineNo">335</span> complete(tableName, req, locs, null);<a name="line.335"></a>
+<span class="sourceLineNo">336</span> return true;<a name="line.336"></a>
+<span class="sourceLineNo">337</span> }<a name="line.337"></a>
+<span class="sourceLineNo">338</span><a name="line.338"></a>
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+<span class="sourceLineNo">340</span> int replicaId) {<a name="line.340"></a>
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+<span class="sourceLineNo">347</span> if (loc == null) {<a name="line.347"></a>
+<span class="sourceLineNo">348</span> return null;<a name="line.348"></a>
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+<span class="sourceLineNo">350</span> byte[] endKey = loc.getRegion().getEndKey();<a name="line.350"></a>
+<span class="sourceLineNo">351</span> if (isEmptyStopRow(endKey) || Bytes.compareTo(row, endKey) < 0) {<a name="line.351"></a>
+<span class="sourceLineNo">352</span> if (LOG.isTraceEnabled()) {<a name="line.352"></a>
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+<span class="sourceLineNo">354</span> Bytes.toStringBinary(row), RegionLocateType.CURRENT, replicaId);<a name="line.354"></a>
+<span class="sourceLineNo">355</span> }<a name="line.355"></a>
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+<span class="sourceLineNo">358</span> return null;<a name="line.358"></a>
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+<span class="sourceLineNo">360</span> }<a name="line.360"></a>
+<span class="sourceLineNo">361</span><a name="line.361"></a>
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+<span class="sourceLineNo">365</span> Map.Entry<byte[], RegionLocations> entry =<a name="line.365"></a>
+<span class="sourceLineNo">366</span> isEmptyStopRow ? tableCache.cache.lastEntry() : tableCache.cache.lowerEntry(row);<a name="line.366"></a>
+<span class="sourceLineNo">367</span> if (entry == null) {<a name="line.367"></a>
+<span class="sourceLineNo">368</span> return null;<a name="line.368"></a>
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+<span class="sourceLineNo">370</span> RegionLocations locs = entry.getValue();<a name="line.370"></a>
+<span class="sourceLineNo">371</span> HRegionLocation loc = locs.getRegionLocation(replicaId);<a name="line.371"></a>
+<span class="sourceLineNo">372</span> if (loc == null) {<a name="line.372"></a>
+<span class="sourceLineNo">373</span> return null;<a name="line.373"></a>
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+<span class="sourceLineNo">379</span> Bytes.toStringBinary(row), RegionLocateType.BEFORE, replicaId);<a name="line.379"></a>
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+<span class="sourceLineNo">385</span> }<a name="line.385"></a>
+<span class="sourceLineNo">386</span><a name="line.386"></a>
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+<span class="sourceLineNo">389</span> LOG.trace("Try locate '" + tableName + "', row='" + Bytes.toStringBinary(req.row) +<a name="line.389"></a>
+<span class="sourceLineNo">390</span> "', locateType=" + req.locateType + " in meta");<a name="line.390"></a>
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+<span class="sourceLineNo">395</span> byte[] binaryTableName = tableName.getName();<a name="line.395"></a>
+<span class="sourceLineNo">396</span> metaStartKey = Arrays.copyOf(binaryTableName, binaryTableName.length + 1);<a name="line.396"></a>
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+<span class="sourceLineNo">400</span> } else {<a name="line.400"></a>
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+<span class="sourceLineNo">411</span><a name="line.411"></a>
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+<span class="sourceLineNo">414</span> @Override<a name="line.414"></a>
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+<span class="sourceLineNo">418</span><a name="line.418"></a>
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+<span class="sourceLineNo">428</span><a name="line.428"></a>
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+<span class="sourceLineNo">444</span> // Add the remaining results into cache<a name="line.444"></a>
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+<span class="sourceLineNo">450</span> continue;<a name="line.450"></a>
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+<span class="sourceLineNo">458</span> continue;<a name="line.458"></a>
+<span class="sourceLineNo">459</span> }<a name="line.459"></a>
+<span class="sourceLineNo">460</span> RegionLocations addedLocs = addToCache(tableCache, locs);<a name="line.460"></a>
+<span class="sourceLineNo">461</span> synchronized (tableCache) {<a name="line.461"></a>
+<span class="sourceLineNo">462</span> tableCache.clearCompletedRequests(Optional.of(addedLocs));<a name="line.462"></a>
+<span class="sourceLineNo">463</span> }<a name="line.463"></a>
+<span class="sourceLineNo">464</span> }<a name="line.464"></a>
+<span class="sourceLineNo">465</span> }<a name="line.465"></a>
+<span class="sourceLineNo">466</span> }<a name="line.466"></a>
+<span class="sourceLineNo">467</span> });<a name="line.467"></a>
+<span class="sourceLineNo">468</span> }<a name="line.468"></a>
+<span class="sourceLineNo">469</span><a name="line.469"></a>
+<span class="sourceLineNo">470</span> private RegionLocations locateInCache(TableCache tableCache, TableName tableName, byte[] row,<a name="line.470"></a>
+<span class="sourceLineNo">471</span> int replicaId, RegionLocateType locateType) {<a name="line.471"></a>
+<span class="sourceLineNo">472</span> return locateType.equals(RegionLocateType.BEFORE)<a name="line.472"></a>
+<span class="sourceLineNo">473</span> ? locateRowBeforeInCache(tableCache, tableName, row, replicaId)<a name="line.473"></a>
+<span class="sourceLineNo">474</span> : locateRowInCache(tableCache, tableName, row, replicaId);<a name="line.474"></a>
+<span class="sourceLineNo">475</span> }<a name="line.475"></a>
+<span class="sourceLineNo">476</span><a name="line.476"></a>
+<span class="sourceLineNo">477</span> // locateToPrevious is true means we will use the start key of a region to locate the region<a name="line.477"></a>
+<span class="sourceLineNo">478</span> // placed before it. Used for reverse scan. See the comment of<a name="line.478"></a>
+<span class="sourceLineNo">479</span> // AsyncRegionLocator.getPreviousRegionLocation.<a name="line.479"></a>
+<span class="sourceLineNo">480</span> private CompletableFuture<RegionLocations> getRegionLocationsInternal(TableName tableName,<a name="line.480"></a>
+<span class="sourceLineNo">481</span> byte[] row, int replicaId, RegionLocateType locateType, boolean reload) {<a name="line.481"></a>
+<span class="sourceLineNo">482</span> // AFTER should be convert to CURRENT before calling this method<a name="line.482"></a>
+<span class="sourceLineNo">483</span> assert !locateType.equals(RegionLocateType.AFTER);<a name="line.483"></a>
+<span class="sourceLineNo">484</span> TableCache tableCache = getTableCache(tableName);<a name="line.484"></a>
+<span class="sourceLineNo">485</span> if (!reload) {<a name="line.485"></a>
+<span class="sourceLineNo">486</span> RegionLocations locs = locateInCache(tableCache, tableName, row, replicaId, locateType);<a name="line.486"></a>
+<span class="sourceLineNo">487</span> if (isGood(locs, replicaId)) {<a name="line.487"></a>
+<span class="sourceLineNo">488</span> return CompletableFuture.completedFuture(locs);<a name="line.488"></a>
+<span class="sourceLineNo">489</span> }<a name="line.489"></a>
+<span class="sourceLineNo">490</span> }<a name="line.490"></a>
+<span class="sourceLineNo">491</span> CompletableFuture<RegionLocations> future;<a name="line.491"></a>
+<span class="sourceLineNo">492</span> LocateRequest req;<a name="line.492"></a>
+<span class="sourceLineNo">493</span> boolean sendRequest = false;<a name="line.493"></a>
+<span class="sourceLineNo">494</span> synchronized (tableCache) {<a name="line.494"></a>
+<span class="sourceLineNo">495</span> // check again<a name="line.495"></a>
+<span class="sourceLineNo">496</span> if (!reload) {<a name="line.496"></a>
+<span class="sourceLineNo">497</span> RegionLocations locs = locateInCache(tableCache, tableName, row, replicaId, locateType);<a name="line.497"></a>
+<span class="sourceLineNo">498</span> if (isGood(locs, replicaId)) {<a name="line.498"></a>
+<span class="sourceLineNo">499</span> return CompletableFuture.completedFuture(locs);<a name="line.499"></a>
+<span class="sourceLineNo">500</span> }<a name="line.500"></a>
+<span class="sourceLineNo">501</span> }<a name="line.501"></a>
+<span class="sourceLineNo">502</span> req = new LocateRequest(row, locateType);<a name="line.502"></a>
+<span class="sourceLineNo">503</span> future = tableCache.allRequests.get(req);<a name="line.503"></a>
+<span class="sourceLineNo">504</span> if (future == null) {<a name="line.504"></a>
+<span class="sourceLineNo">505</span> future = new CompletableFuture<>();<a name="line.505"></a>
+<span class="sourceLineNo">506</span> tableCache.allRequests.put(req, future);<a name="line.506"></a>
+<span class="sourceLineNo">507</span> if (tableCache.hasQuota(maxConcurrentLocateRequestPerTable) && !tableCache.isPending(req)) {<a name="line.507"></a>
+<span class="sourceLineNo">508</span> tableCache.send(req);<a name="line.508"></a>
+<span class="sourceLineNo">509</span> sendRequest = true;<a name="line.509"></a>
+<span class="sourceLineNo">510</span> }<a name="line.510"></a>
+<span class="sourceLineNo">511</span> }<a name="line.511"></a>
+<span class="sourceLineNo">512</span> }<a name="line.512"></a>
+<span class="sourceLineNo">513</span> if (sendRequest) {<a name="line.513"></a>
+<span class="sourceLineNo">514</span> locateInMeta(tableName, req);<a name="line.514"></a>
+<span class="sourceLineNo">515</span> }<a name="line.515"></a>
+<span class="sourceLineNo">516</span> return future;<a name="line.516"></a>
+<span class="sourceLineNo">517</span> }<a name="line.517"></a>
+<span class="sourceLineNo">518</span><a name="line.518"></a>
+<span class="sourceLineNo">519</span> CompletableFuture<RegionLocations> getRegionLocations(TableName tableName, byte[] row,<a name="line.519"></a>
+<span class="sourceLineNo">520</span> int replicaId, RegionLocateType locateType, boolean reload) {<a name="line.520"></a>
+<span class="sourceLineNo">521</span> // as we know the exact row after us, so we can just create the new row, and use the same<a name="line.521"></a>
+<span class="sourceLineNo">522</span> // algorithm to locate it.<a name="line.522"></a>
+<span class="sourceLineNo">523</span> if (locateType.equals(RegionLocateType.AFTER)) {<a name="line.523"></a>
+<span class="sourceLineNo">524</span> row = createClosestRowAfter(row);<a name="line.524"></a>
+<span class="sourceLineNo">525</span> locateType = RegionLocateType.CURRENT;<a name="line.525"></a>
+<span class="sourceLineNo">526</span> }<a name="line.526"></a>
+<span class="sourceLineNo">527</span> return getRegionLocationsInternal(tableName, row, replicaId, locateType, reload);<a name="line.527"></a>
+<span class="sourceLineNo">528</span> }<a name="line.528"></a>
+<span class="sourceLineNo">529</span><a name="line.529"></a>
+<span class="sourceLineNo">530</span> private void removeLocationFromCache(HRegionLocation loc) {<a name="line.530"></a>
+<span class="sourceLineNo">531</span> TableCache tableCache = cache.get(loc.getRegion().getTable());<a name="line.531"></a>
+<span class="sourceLineNo">532</span> if (tableCache == null) {<a name="line.532"></a>
+<span class="sourceLineNo">533</span> return;<a name="line.533"></a>
+<span class="sourceLineNo">534</span> }<a name="line.534"></a>
+<span class="sourceLineNo">535</span> byte[] startKey = loc.getRegion().getStartKey();<a name="line.535"></a>
+<span class="sourceLineNo">536</span> for (;;) {<a name="line.536"></a>
+<span class="sourceLineNo">537</span> RegionLocations oldLocs = tableCache.cache.get(startKey);<a name="line.537"></a>
+<span class="sourceLineNo">538</span> HRegionLocation oldLoc = oldLocs.getRegionLocation(loc.getRegion().getReplicaId());<a name="line.538"></a>
+<span class="sourceLineNo">539</span> if (!canUpdateOnError(loc, oldLoc)) {<a name="line.539"></a>
+<span class="sourceLineNo">540</span> return;<a name="line.540"></a>
+<span class="sourceLineNo">541</span> }<a name="line.541"></a>
+<span class="sourceLineNo">542</span> RegionLocations newLocs = removeRegionLocation(oldLocs, loc.getRegion().getReplicaId());<a name="line.542"></a>
+<span class="sourceLineNo">543</span> if (newLocs == null) {<a name="line.543"></a>
+<span class="sourceLineNo">544</span> if (tableCache.cache.remove(startKey, oldLocs)) {<a name="line.544"></a>
+<span class="sourceLineNo">545</span> return;<a name="line.545"></a>
+<span class="sourceLineNo">546</span> }<a name="line.546"></a>
+<span class="sourceLineNo">547</span> } else {<a name="line.547"></a>
+<span class="sourceLineNo">548</span> if (tableCache.cache.replace(startKey, oldLocs, newLocs)) {<a name="line.548"></a>
+<span class="sourceLineNo">549</span> return;<a name="line.549"></a>
+<span class="sourceLineNo">550</span> }<a name="line.550"></a>
+<span class="sourceLineNo">551</span> }<a name="line.551"></a>
+<span class="sourceLineNo">552</span> }<a name="line.552"></a>
<span class="sourceLineNo">553</span> }<a name="line.553"></a>
<span class="sourceLineNo">554</span><a name="line.554"></a>
-<span class="sourceLineNo">555</span> void updateCachedLocationOnError(HRegionLocation loc, Throwable exception) {<a name="line.555"></a>
-<span class="sourceLineNo">556</span> AsyncRegionLocatorHelper.updateCachedLocationOnError(loc, exception, this::getCachedLocation,<a name="line.556"></a>
-<span class="sourceLineNo">557</span> this::addLocationToCache, this::removeLocationFromCache);<a name="line.557"></a>
-<span class="sourceLineNo">558</span> }<a name="line.558"></a>
-<span class="sourceLineNo">559</span><a name="line.559"></a>
-<span class="sourceLineNo">560</span> void clearCache(TableName tableName) {<a name="line.560"></a>
-<span class="sourceLineNo">561</span> TableCache tableCache = cache.remove(tableName);<a name="line.561"></a>
-<span class="sourceLineNo">562</span> if (tableCache == null) {<a name="line.562"></a>
-<span class="sourceLineNo">563</span> return;<a name="line.563"></a>
-<span class="sourceLineNo">564</span> }<a name="line.564"></a>
-<span class="sourceLineNo">565</span> synchronized (tableCache) {<a name="line.565"></a>
-<span class="sourceLineNo">566</span> if (!tableCache.allRequests.isEmpty()) {<a name="line.566"></a>
-<span class="sourceLineNo">567</span> IOException error = new IOException("Cache cleared");<a name="line.567"></a>
-<span class="sourceLineNo">568</span> tableCache.allRequests.values().forEach(f -> f.completeExceptionally(error));<a name="line.568"></a>
-<span class="sourceLineNo">569</span> }<a name="line.569"></a>
-<span class="sourceLineNo">570</span> }<a name="line.570"></a>
+<span class="sourceLineNo">555</span> private void addLocationToCache(HRegionLocation loc) {<a name="line.555"></a>
+<span class="sourceLineNo">556</span> addToCache(getTableCache(loc.getRegion().getTable()), createRegionLocations(loc));<a name="line.556"></a>
+<span class="sourceLineNo">557</span> }<a name="line.557"></a>
+<span class="sourceLineNo">558</span><a name="line.558"></a>
+<span class="sourceLineNo">559</span> private HRegionLocation getCachedLocation(HRegionLocation loc) {<a name="line.559"></a>
+<span class="sourceLineNo">560</span> TableCache tableCache = cache.get(loc.getRegion().getTable());<a name="line.560"></a>
+<span class="sourceLineNo">561</span> if (tableCache == null) {<a name="line.561"></a>
+<span class="sourceLineNo">562</span> return null;<a name="line.562"></a>
+<span class="sourceLineNo">563</span> }<a name="line.563"></a>
+<span class="sourceLineNo">564</span> RegionLocations locs = tableCache.cache.get(loc.getRegion().getStartKey());<a name="line.564"></a>
+<span class="sourceLineNo">565</span> return locs != null ? locs.getRegionLocation(loc.getRegion().getReplicaId()) : null;<a name="line.565"></a>
+<span class="sourceLineNo">566</span> }<a name="line.566"></a>
+<span class="sourceLineNo">567</span><a name="line.567"></a>
+<span class="sourceLineNo">568</span> void updateCachedLocationOnError(HRegionLocation loc, Throwable exception) {<a name="line.568"></a>
+<span class="sourceLineNo">569</span> AsyncRegionLocatorHelper.updateCachedLocationOnError(loc, exception, this::getCachedLocation,<a name="line.569"></a>
+<span class="sourceLineNo">570</span> this::addLocationToCache, this::removeLocationFromCache);<a name="line.570"></a>
<span class="sourceLineNo">571</span> }<a name="line.571"></a>
<span class="sourceLineNo">572</span><a name="line.572"></a>
-<span class="sourceLineNo">573</span> void clearCache() {<a name="line.573"></a>
-<span class="sourceLineNo">574</span> cache.clear();<a name="line.574"></a>
-<span class="sourceLineNo">575</span> }<a name="line.575"></a>
-<span class="sourceLineNo">576</span><a name="line.576"></a>
-<span class="sourceLineNo">577</span> // only used for testing whether we have cached the location for a region.<a name="line.577"></a>
-<span class="sourceLineNo">578</span> @VisibleForTesting<a name="line.578"></a>
-<span class="sourceLineNo">579</span> RegionLocations getRegionLocationInCache(TableName tableName, byte[] row) {<a name="line.579"></a>
-<span class="sourceLineNo">580</span> TableCache tableCache = cache.get(tableName);<a name="line.580"></a>
-<span class="sourceLineNo">581</span> if (tableCache == null) {<a name="line.581"></a>
-<span class="sourceLineNo">582</span> return null;<a name="line.582"></a>
+<span class="sourceLineNo">573</span> void clearCache(TableName tableName) {<a name="line.573"></a>
+<span class="sourceLineNo">574</span> TableCache tableCache = cache.remove(tableName);<a name="line.574"></a>
+<span class="sourceLineNo">575</span> if (tableCache == null) {<a name="line.575"></a>
+<span class="sourceLineNo">576</span> return;<a name="line.576"></a>
+<span class="sourceLineNo">577</span> }<a name="line.577"></a>
+<span class="sourceLineNo">578</span> synchronized (tableCache) {<a name="line.578"></a>
+<span class="sourceLineNo">579</span> if (!tableCache.allRequests.isEmpty()) {<a name="line.579"></a>
+<span class="sourceLineNo">580</span> IOException error = new IOException("Cache cleared");<a name="line.580"></a>
+<span class="sourceLineNo">581</span> tableCache.allRequests.values().forEach(f -> f.completeExceptionally(error));<a name="line.581"></a>
+<span class="sourceLineNo">582</span> }<a name="line.582"></a>
<span class="sourceLineNo">583</span> }<a name="line.583"></a>
-<span class="sourceLineNo">584</span> return locateRowInCache(tableCache, tableName, row, RegionReplicaUtil.DEFAULT_REPLICA_ID);<a name="line.584"></a>
-<span class="sourceLineNo">585</span> }<a name="line.585"></a>
-<span class="sourceLineNo">586</span>}<a name="line.586"></a>
+<span class="sourceLineNo">584</span> }<a name="line.584"></a>
+<span class="sourceLineNo">585</span><a name="line.585"></a>
+<span class="sourceLineNo">586</span> void clearCache() {<a name="line.586"></a>
+<span class="sourceLineNo">587</span> cache.clear();<a name="line.587"></a>
+<span class="sourceLineNo">588</span> }<a name="line.588"></a>
+<span class="sourceLineNo">589</span><a name="line.589"></a>
+<span class="sourceLineNo">590</span> // only used for testing whether we have cached the location for a region.<a name="line.590"></a>
+<span class="sourceLineNo">591</span> @VisibleForTesting<a name="line.591"></a>
+<span class="sourceLineNo">592</span> RegionLocations getRegionLocationInCache(TableName tableName, byte[] row) {<a name="line.592"></a>
+<span class="sourceLineNo">593</span> TableCache tableCache = cache.get(tableName);<a name="line.593"></a>
+<span class="sourceLineNo">594</span> if (tableCache == null) {<a name="line.594"></a>
+<span class="sourceLineNo">595</span> return null;<a name="line.595"></a>
+<span class="sourceLineNo">596</span> }<a name="line.596"></a>
+<span class="sourceLineNo">597</span> return locateRowInCache(tableCache, tableName, row, RegionReplicaUtil.DEFAULT_REPLICA_ID);<a name="line.597"></a>
+<span class="sourceLineNo">598</span> }<a name="line.598"></a>
+<span class="sourceLineNo">599</span>}<a name="line.599"></a>
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html
index 609e9fc..fddf470 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.TableCache.html
@@ -31,567 +31,580 @@
<span class="sourceLineNo">023</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.canUpdateOnError;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.createRegionLocations;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.isGood;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.mergeRegionLocations;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.removeRegionLocation;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import static org.apache.hadoop.hbase.client.RegionInfo.createRegionName;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import static org.apache.hadoop.hbase.util.Bytes.BYTES_COMPARATOR;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;<a name="line.32"></a>
-<span class="sourceLineNo">033</span><a name="line.33"></a>
-<span class="sourceLineNo">034</span>import java.io.IOException;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import java.util.Arrays;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import java.util.HashSet;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import java.util.Iterator;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import java.util.LinkedHashMap;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import java.util.Map;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import java.util.Optional;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import java.util.Set;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import java.util.concurrent.CompletableFuture;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentMap;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentNavigableMap;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import java.util.concurrent.ConcurrentSkipListMap;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.commons.lang3.ObjectUtils;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.HConstants;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.TableName;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.TableNotFoundException;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.client.Scan.ReadType;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.slf4j.Logger;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.slf4j.LoggerFactory;<a name="line.59"></a>
-<span class="sourceLineNo">060</span><a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hbase.thirdparty.com.google.common.base.Objects;<a name="line.62"></a>
-<span class="sourceLineNo">063</span><a name="line.63"></a>
-<span class="sourceLineNo">064</span>/**<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * The asynchronous locator for regions other than meta.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> */<a name="line.66"></a>
-<span class="sourceLineNo">067</span>@InterfaceAudience.Private<a name="line.67"></a>
-<span class="sourceLineNo">068</span>class AsyncNonMetaRegionLocator {<a name="line.68"></a>
-<span class="sourceLineNo">069</span><a name="line.69"></a>
-<span class="sourceLineNo">070</span> private static final Logger LOG = LoggerFactory.getLogger(AsyncNonMetaRegionLocator.class);<a name="line.70"></a>
-<span class="sourceLineNo">071</span><a name="line.71"></a>
-<span class="sourceLineNo">072</span> @VisibleForTesting<a name="line.72"></a>
-<span class="sourceLineNo">073</span> static final String MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE =<a name="line.73"></a>
-<span class="sourceLineNo">074</span> "hbase.client.meta.max.concurrent.locate.per.table";<a name="line.74"></a>
-<span class="sourceLineNo">075</span><a name="line.75"></a>
-<span class="sourceLineNo">076</span> private static final int DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE = 8;<a name="line.76"></a>
-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span> @VisibleForTesting<a name="line.78"></a>
-<span class="sourceLineNo">079</span> static String LOCATE_PREFETCH_LIMIT = "hbase.client.locate.prefetch.limit";<a name="line.79"></a>
-<span class="sourceLineNo">080</span><a name="line.80"></a>
-<span class="sourceLineNo">081</span> private static final int DEFAULT_LOCATE_PREFETCH_LIMIT = 10;<a name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span> private final AsyncConnectionImpl conn;<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
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+<span class="sourceLineNo">027</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;<a name="line.27"></a>
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+<span class="sourceLineNo">030</span>import static org.apache.hadoop.hbase.util.Bytes.BYTES_COMPARATOR;<a name="line.30"></a>
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+<span class="sourceLineNo">032</span><a name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.io.IOException;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.Arrays;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import java.util.HashSet;<a name="line.35"></a>
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+<span class="sourceLineNo">038</span>import java.util.Map;<a name="line.38"></a>
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+<span class="sourceLineNo">042</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.42"></a>
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+<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentNavigableMap;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentSkipListMap;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.commons.lang3.ObjectUtils;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.HConstants;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.TableName;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.TableNotFoundException;<a name="line.53"></a>
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+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.55"></a>
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+<span class="sourceLineNo">057</span>import org.slf4j.Logger;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.slf4j.LoggerFactory;<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
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+<span class="sourceLineNo">061</span>import org.apache.hbase.thirdparty.com.google.common.base.Objects;<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>/**<a name="line.63"></a>
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+<span class="sourceLineNo">066</span>@InterfaceAudience.Private<a name="line.66"></a>
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+<span class="sourceLineNo">073</span> "hbase.client.meta.max.concurrent.locate.per.table";<a name="line.73"></a>
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+<span class="sourceLineNo">104</span> }<a name="line.104"></a>
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+<span class="sourceLineNo">110</span> }<a name="line.110"></a>
+<span class="sourceLineNo">111</span> LocateRequest that = (LocateRequest) obj;<a name="line.111"></a>
+<span class="sourceLineNo">112</span> return locateType.equals(that.locateType) && Bytes.equals(row, that.row);<a name="line.112"></a>
+<span class="sourceLineNo">113</span> }<a name="line.113"></a>
+<span class="sourceLineNo">114</span> }<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
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+<span class="sourceLineNo">117</span><a name="line.117"></a>
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+<span class="sourceLineNo">119</span> new ConcurrentSkipListMap<>(BYTES_COMPARATOR);<a name="line.119"></a>
+<span class="sourceLineNo">120</span><a name="line.120"></a>
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+<span class="sourceLineNo">122</span><a name="line.122"></a>
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+<span class="sourceLineNo">124</span> new LinkedHashMap<>();<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
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+<span class="sourceLineNo">129</span><a name="line.129"></a>
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+<span class="sourceLineNo">189</span> this.maxConcurrentLocateRequestPerTable = conn.getConfiguration().getInt(<a name="line.189"></a>
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+<span class="sourceLineNo">194</span><a name="line.194"></a>
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+<span class="sourceLineNo">213</span> } else {<a name="line.213"></a>
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+<span class="sourceLineNo">223</span> }<a name="line.223"></a>
+<span class="sourceLineNo">224</span> }<a name="line.224"></a>
+<span class="sourceLineNo">225</span> return true;<a name="line.225"></a>
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+<span class="sourceLineNo">228</span> // if we successfully add the locations to cache, return the locations, otherwise return the one<a name="line.228"></a>
+<span class="sourceLineNo">229</span> // which prevents us being added. The upper layer can use this value to complete pending requests.<a name="line.229"></a>
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<span class="sourceLineNo">233</span> for (;;) {<a name="line.233"></a>
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+<span class="sourceLineNo">236</span> return locs;<a name="line.236"></a>
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-<span class="sourceLineNo">242</span> " is newer than us or has the same server name." +<a name="line.242"></a>
-<span class="sourceLineNo">243</span> " Maybe it is updated before we replace it", locs, oldLocs);<a name="line.243"></a>
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-<span class="sourceLineNo">255</span> LOG.warn("Failed to locate region in '" + tableName + "', row='" +<a name="line.255"></a>
-<span class="sourceLineNo">256</span> Bytes.toStringBinary(req.row) + "', locateType=" + req.locateType, error);<a name="line.256"></a>
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-<span class="sourceLineNo">258</span> Optional<LocateRequest> toSend = Optional.empty();<a name="line.258"></a>
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-<span class="sourceLineNo">262</span> // someone is ahead of us.<a name="line.262"></a>
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-<span class="sourceLineNo">267</span> // quota to send a candidate request.<a name="line.267"></a>
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-<span class="sourceLineNo">275</span> synchronized (tableCache) {<a name="line.275"></a>
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-<span class="sourceLineNo">278</span> // fail the request itself, no matter whether it is a DoNotRetryIOException, as we have<a name="line.278"></a>
-<span class="sourceLineNo">279</span> // already retried several times<a name="line.279"></a>
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-<span class="sourceLineNo">281</span> if (future != null) {<a name="line.281"></a>
-<span class="sourceLineNo">282</span> future.completeExceptionally(error);<a name="line.282"></a>
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-<span class="sourceLineNo">286</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.286"></a>
-<span class="sourceLineNo">287</span> // quota to send a candidate request.<a name="line.287"></a>
-<span class="sourceLineNo">288</span> toSend = tableCache.getCandidate();<a name="line.288"></a>
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-<span class="sourceLineNo">298</span> LOG.debug("The fetched location of '{}', row='{}', locateType={} is {}", tableName,<a name="line.298"></a>
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-<span class="sourceLineNo">303</span> // let's fail the request.<a name="line.303"></a>
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-<span class="sourceLineNo">306</span> new HBaseIOException(String.format("No location found for '%s', row='%s', locateType=%s",<a name="line.306"></a>
-<span class="sourceLineNo">307</span> tableName, Bytes.toStringBinary(req.row), req.locateType)));<a name="line.307"></a>
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-<span class="sourceLineNo">310</span> HRegionLocation loc = locs.getDefaultRegionLocation();<a name="line.310"></a>
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-<span class="sourceLineNo">318</span> if (info.isSplitParent()) {<a name="line.318"></a>
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+<span class="sourceLineNo">238</span> // check whether the regions are the same, this usually happens when table is split/merged, or<a name="line.238"></a>
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+<span class="sourceLineNo">240</span> RegionInfo region = locs.getRegionLocation().getRegion();<a name="line.240"></a>
+<span class="sourceLineNo">241</span> RegionInfo oldRegion = oldLocs.getRegionLocation().getRegion();<a name="line.241"></a>
+<span class="sourceLineNo">242</span> if (region.getEncodedName().equals(oldRegion.getEncodedName())) {<a name="line.242"></a>
+<span class="sourceLineNo">243</span> RegionLocations mergedLocs = oldLocs.mergeLocations(locs);<a name="line.243"></a>
+<span class="sourceLineNo">244</span> if (isEqual(mergedLocs, oldLocs)) {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> // the merged one is the same with the old one, give up<a name="line.245"></a>
+<span class="sourceLineNo">246</span> LOG.trace("Will not add {} to cache because the old value {} " +<a name="line.246"></a>
+<span class="sourceLineNo">247</span> " is newer than us or has the same server name." +<a name="line.247"></a>
+<span class="sourceLineNo">248</span> " Maybe it is updated before we replace it", locs, oldLocs);<a name="line.248"></a>
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+<span class="sourceLineNo">253</span> }<a name="line.253"></a>
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+<span class="sourceLineNo">256</span> // the upper layer can detect this and trigger removal of the wrong locations<a name="line.256"></a>
+<span class="sourceLineNo">257</span> if (LOG.isDebugEnabled()) {<a name="line.257"></a>
+<span class="sourceLineNo">258</span> LOG.debug("The newnly fetch region {} is different from the old one {} for row '{}'," +<a name="line.258"></a>
+<span class="sourceLineNo">259</span> " try replaing the old one...", region, oldRegion, Bytes.toStringBinary(startKey));<a name="line.259"></a>
+<span class="sourceLineNo">260</span> }<a name="line.260"></a>
+<span class="sourceLineNo">261</span> if (tableCache.cache.replace(startKey, oldLocs, locs)) {<a name="line.261"></a>
+<span class="sourceLineNo">262</span> return locs;<a name="line.262"></a>
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+<span class="sourceLineNo">264</span> }<a name="line.264"></a>
+<span class="sourceLineNo">265</span> }<a name="line.265"></a>
+<span class="sourceLineNo">266</span> }<a name="line.266"></a>
+<span class="sourceLineNo">267</span><a name="line.267"></a>
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+<span class="sourceLineNo">269</span> Throwable error) {<a name="line.269"></a>
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+<span class="sourceLineNo">271</span> LOG.warn("Failed to locate region in '" + tableName + "', row='" +<a name="line.271"></a>
+<span class="sourceLineNo">272</span> Bytes.toStringBinary(req.row) + "', locateType=" + req.locateType, error);<a name="line.272"></a>
+<span class="sourceLineNo">273</span> }<a name="line.273"></a>
+<span class="sourceLineNo">274</span> Optional<LocateRequest> toSend = Optional.empty();<a name="line.274"></a>
+<span class="sourceLineNo">275</span> TableCache tableCache = getTableCache(tableName);<a name="line.275"></a>
+<span class="sourceLineNo">276</span> if (locs != null) {<a name="line.276"></a>
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+<span class="sourceLineNo">278</span> synchronized (tableCache) {<a name="line.278"></a>
+<span class="sourceLineNo">279</span> tableCache.pendingRequests.remove(req);<a name="line.279"></a>
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+<span class="sourceLineNo">282</span> // quota to send a candidate request.<a name="line.282"></a>
+<span class="sourceLineNo">283</span> toSend = tableCache.getCandidate();<a name="line.283"></a>
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+<span class="sourceLineNo">293</span> // already retried several times<a name="line.293"></a>
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+<span class="sourceLineNo">523</span> if (locateType.equals(RegionLocateType.AFTER)) {<a name="line.523"></a>
+<span class="sourceLineNo">524</span> row = createClosestRowAfter(row);<a name="line.524"></a>
+<span class="sourceLineNo">525</span> locateType = RegionLocateType.CURRENT;<a name="line.525"></a>
+<span class="sourceLineNo">526</span> }<a name="line.526"></a>
+<span class="sourceLineNo">527</span> return getRegionLocationsInternal(tableName, row, replicaId, locateType, reload);<a name="line.527"></a>
+<span class="sourceLineNo">528</span> }<a name="line.528"></a>
+<span class="sourceLineNo">529</span><a name="line.529"></a>
+<span class="sourceLineNo">530</span> private void removeLocationFromCache(HRegionLocation loc) {<a name="line.530"></a>
+<span class="sourceLineNo">531</span> TableCache tableCache = cache.get(loc.getRegion().getTable());<a name="line.531"></a>
+<span class="sourceLineNo">532</span> if (tableCache == null) {<a name="line.532"></a>
+<span class="sourceLineNo">533</span> return;<a name="line.533"></a>
+<span class="sourceLineNo">534</span> }<a name="line.534"></a>
+<span class="sourceLineNo">535</span> byte[] startKey = loc.getRegion().getStartKey();<a name="line.535"></a>
+<span class="sourceLineNo">536</span> for (;;) {<a name="line.536"></a>
+<span class="sourceLineNo">537</span> RegionLocations oldLocs = tableCache.cache.get(startKey);<a name="line.537"></a>
+<span class="sourceLineNo">538</span> HRegionLocation oldLoc = oldLocs.getRegionLocation(loc.getRegion().getReplicaId());<a name="line.538"></a>
+<span class="sourceLineNo">539</span> if (!canUpdateOnError(loc, oldLoc)) {<a name="line.539"></a>
+<span class="sourceLineNo">540</span> return;<a name="line.540"></a>
+<span class="sourceLineNo">541</span> }<a name="line.541"></a>
+<span class="sourceLineNo">542</span> RegionLocations newLocs = removeRegionLocation(oldLocs, loc.getRegion().getReplicaId());<a name="line.542"></a>
+<span class="sourceLineNo">543</span> if (newLocs == null) {<a name="line.543"></a>
+<span class="sourceLineNo">544</span> if (tableCache.cache.remove(startKey, oldLocs)) {<a name="line.544"></a>
+<span class="sourceLineNo">545</span> return;<a name="line.545"></a>
+<span class="sourceLineNo">546</span> }<a name="line.546"></a>
+<span class="sourceLineNo">547</span> } else {<a name="line.547"></a>
+<span class="sourceLineNo">548</span> if (tableCache.cache.replace(startKey, oldLocs, newLocs)) {<a name="line.548"></a>
+<span class="sourceLineNo">549</span> return;<a name="line.549"></a>
+<span class="sourceLineNo">550</span> }<a name="line.550"></a>
+<span class="sourceLineNo">551</span> }<a name="line.551"></a>
+<span class="sourceLineNo">552</span> }<a name="line.552"></a>
<span class="sourceLineNo">553</span> }<a name="line.553"></a>
<span class="sourceLineNo">554</span><a name="line.554"></a>
-<span class="sourceLineNo">555</span> void updateCachedLocationOnError(HRegionLocation loc, Throwable exception) {<a name="line.555"></a>
-<span class="sourceLineNo">556</span> AsyncRegionLocatorHelper.updateCachedLocationOnError(loc, exception, this::getCachedLocation,<a name="line.556"></a>
-<span class="sourceLineNo">557</span> this::addLocationToCache, this::removeLocationFromCache);<a name="line.557"></a>
-<span class="sourceLineNo">558</span> }<a name="line.558"></a>
-<span class="sourceLineNo">559</span><a name="line.559"></a>
-<span class="sourceLineNo">560</span> void clearCache(TableName tableName) {<a name="line.560"></a>
-<span class="sourceLineNo">561</span> TableCache tableCache = cache.remove(tableName);<a name="line.561"></a>
-<span class="sourceLineNo">562</span> if (tableCache == null) {<a name="line.562"></a>
-<span class="sourceLineNo">563</span> return;<a name="line.563"></a>
-<span class="sourceLineNo">564</span> }<a name="line.564"></a>
-<span class="sourceLineNo">565</span> synchronized (tableCache) {<a name="line.565"></a>
-<span class="sourceLineNo">566</span> if (!tableCache.allRequests.isEmpty()) {<a name="line.566"></a>
-<span class="sourceLineNo">567</span> IOException error = new IOException("Cache cleared");<a name="line.567"></a>
-<span class="sourceLineNo">568</span> tableCache.allRequests.values().forEach(f -> f.completeExceptionally(error));<a name="line.568"></a>
-<span class="sourceLineNo">569</span> }<a name="line.569"></a>
-<span class="sourceLineNo">570</span> }<a name="line.570"></a>
+<span class="sourceLineNo">555</span> private void addLocationToCache(HRegionLocation loc) {<a name="line.555"></a>
+<span class="sourceLineNo">556</span> addToCache(getTableCache(loc.getRegion().getTable()), createRegionLocations(loc));<a name="line.556"></a>
+<span class="sourceLineNo">557</span> }<a name="line.557"></a>
+<span class="sourceLineNo">558</span><a name="line.558"></a>
+<span class="sourceLineNo">559</span> private HRegionLocation getCachedLocation(HRegionLocation loc) {<a name="line.559"></a>
+<span class="sourceLineNo">560</span> TableCache tableCache = cache.get(loc.getRegion().getTable());<a name="line.560"></a>
+<span class="sourceLineNo">561</span> if (tableCache == null) {<a name="line.561"></a>
+<span class="sourceLineNo">562</span> return null;<a name="line.562"></a>
+<span class="sourceLineNo">563</span> }<a name="line.563"></a>
+<span class="sourceLineNo">564</span> RegionLocations locs = tableCache.cache.get(loc.getRegion().getStartKey());<a name="line.564"></a>
+<span class="sourceLineNo">565</span> return locs != null ? locs.getRegionLocation(loc.getRegion().getReplicaId()) : null;<a name="line.565"></a>
+<span class="sourceLineNo">566</span> }<a name="line.566"></a>
+<span class="sourceLineNo">567</span><a name="line.567"></a>
+<span class="sourceLineNo">568</span> void updateCachedLocationOnError(HRegionLocation loc, Throwable exception) {<a name="line.568"></a>
+<span class="sourceLineNo">569</span> AsyncRegionLocatorHelper.updateCachedLocationOnError(loc, exception, this::getCachedLocation,<a name="line.569"></a>
+<span class="sourceLineNo">570</span> this::addLocationToCache, this::removeLocationFromCache);<a name="line.570"></a>
<span class="sourceLineNo">571</span> }<a name="line.571"></a>
<span class="sourceLineNo">572</span><a name="line.572"></a>
-<span class="sourceLineNo">573</span> void clearCache() {<a name="line.573"></a>
-<span class="sourceLineNo">574</span> cache.clear();<a name="line.574"></a>
-<span class="sourceLineNo">575</span> }<a name="line.575"></a>
-<span class="sourceLineNo">576</span><a name="line.576"></a>
-<span class="sourceLineNo">577</span> // only used for testing whether we have cached the location for a region.<a name="line.577"></a>
-<span class="sourceLineNo">578</span> @VisibleForTesting<a name="line.578"></a>
-<span class="sourceLineNo">579</span> RegionLocations getRegionLocationInCache(TableName tableName, byte[] row) {<a name="line.579"></a>
-<span class="sourceLineNo">580</span> TableCache tableCache = cache.get(tableName);<a name="line.580"></a>
-<span class="sourceLineNo">581</span> if (tableCache == null) {<a name="line.581"></a>
-<span class="sourceLineNo">582</span> return null;<a name="line.582"></a>
+<span class="sourceLineNo">573</span> void clearCache(TableName tableName) {<a name="line.573"></a>
+<span class="sourceLineNo">574</span> TableCache tableCache = cache.remove(tableName);<a name="line.574"></a>
+<span class="sourceLineNo">575</span> if (tableCache == null) {<a name="line.575"></a>
+<span class="sourceLineNo">576</span> return;<a name="line.576"></a>
+<span class="sourceLineNo">577</span> }<a name="line.577"></a>
+<span class="sourceLineNo">578</span> synchronized (tableCache) {<a name="line.578"></a>
+<span class="sourceLineNo">579</span> if (!tableCache.allRequests.isEmpty()) {<a name="line.579"></a>
+<span class="sourceLineNo">580</span> IOException error = new IOException("Cache cleared");<a name="line.580"></a>
+<span class="sourceLineNo">581</span> tableCache.allRequests.values().forEach(f -> f.completeExceptionally(error));<a name="line.581"></a>
+<span class="sourceLineNo">582</span> }<a name="line.582"></a>
<span class="sourceLineNo">583</span> }<a name="line.583"></a>
-<span class="sourceLineNo">584</span> return locateRowInCache(tableCache, tableName, row, RegionReplicaUtil.DEFAULT_REPLICA_ID);<a name="line.584"></a>
-<span class="sourceLineNo">585</span> }<a name="line.585"></a>
-<span class="sourceLineNo">586</span>}<a name="line.586"></a>
+<span class="sourceLineNo">584</span> }<a name="line.584"></a>
+<span class="sourceLineNo">585</span><a name="line.585"></a>
+<span class="sourceLineNo">586</span> void clearCache() {<a name="line.586"></a>
+<span class="sourceLineNo">587</span> cache.clear();<a name="line.587"></a>
+<span class="sourceLineNo">588</span> }<a name="line.588"></a>
+<span class="sourceLineNo">589</span><a name="line.589"></a>
+<span class="sourceLineNo">590</span> // only used for testing whether we have cached the location for a region.<a name="line.590"></a>
+<span class="sourceLineNo">591</span> @VisibleForTesting<a name="line.591"></a>
+<span class="sourceLineNo">592</span> RegionLocations getRegionLocationInCache(TableName tableName, byte[] row) {<a name="line.592"></a>
+<span class="sourceLineNo">593</span> TableCache tableCache = cache.get(tableName);<a name="line.593"></a>
+<span class="sourceLineNo">594</span> if (tableCache == null) {<a name="line.594"></a>
+<span class="sourceLineNo">595</span> return null;<a name="line.595"></a>
+<span class="sourceLineNo">596</span> }<a name="line.596"></a>
+<span class="sourceLineNo">597</span> return locateRowInCache(tableCache, tableName, row, RegionReplicaUtil.DEFAULT_REPLICA_ID);<a name="line.597"></a>
+<span class="sourceLineNo">598</span> }<a name="line.598"></a>
+<span class="sourceLineNo">599</span>}<a name="line.599"></a>
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.html b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.html
index 609e9fc..fddf470 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.html
@@ -31,567 +31,580 @@
<span class="sourceLineNo">023</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.canUpdateOnError;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.createRegionLocations;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.isGood;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.mergeRegionLocations;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import static org.apache.hadoop.hbase.client.AsyncRegionLocatorHelper.removeRegionLocation;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import static org.apache.hadoop.hbase.client.RegionInfo.createRegionName;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import static org.apache.hadoop.hbase.util.Bytes.BYTES_COMPARATOR;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;<a name="line.32"></a>
-<span class="sourceLineNo">033</span><a name="line.33"></a>
-<span class="sourceLineNo">034</span>import java.io.IOException;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import java.util.Arrays;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import java.util.HashSet;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import java.util.Iterator;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import java.util.LinkedHashMap;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import java.util.Map;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import java.util.Optional;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import java.util.Set;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import java.util.concurrent.CompletableFuture;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentMap;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentNavigableMap;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import java.util.concurrent.ConcurrentSkipListMap;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.commons.lang3.ObjectUtils;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.HConstants;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.TableName;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.TableNotFoundException;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.client.Scan.ReadType;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.slf4j.Logger;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.slf4j.LoggerFactory;<a name="line.59"></a>
-<span class="sourceLineNo">060</span><a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hbase.thirdparty.com.google.common.base.Objects;<a name="line.62"></a>
-<span class="sourceLineNo">063</span><a name="line.63"></a>
-<span class="sourceLineNo">064</span>/**<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * The asynchronous locator for regions other than meta.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> */<a name="line.66"></a>
-<span class="sourceLineNo">067</span>@InterfaceAudience.Private<a name="line.67"></a>
-<span class="sourceLineNo">068</span>class AsyncNonMetaRegionLocator {<a name="line.68"></a>
-<span class="sourceLineNo">069</span><a name="line.69"></a>
-<span class="sourceLineNo">070</span> private static final Logger LOG = LoggerFactory.getLogger(AsyncNonMetaRegionLocator.class);<a name="line.70"></a>
-<span class="sourceLineNo">071</span><a name="line.71"></a>
-<span class="sourceLineNo">072</span> @VisibleForTesting<a name="line.72"></a>
-<span class="sourceLineNo">073</span> static final String MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE =<a name="line.73"></a>
-<span class="sourceLineNo">074</span> "hbase.client.meta.max.concurrent.locate.per.table";<a name="line.74"></a>
-<span class="sourceLineNo">075</span><a name="line.75"></a>
-<span class="sourceLineNo">076</span> private static final int DEFAULT_MAX_CONCURRENT_LOCATE_REQUEST_PER_TABLE = 8;<a name="line.76"></a>
-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span> @VisibleForTesting<a name="line.78"></a>
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-<span class="sourceLineNo">080</span><a name="line.80"></a>
-<span class="sourceLineNo">081</span> private static final int DEFAULT_LOCATE_PREFETCH_LIMIT = 10;<a name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span> private final AsyncConnectionImpl conn;<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span> private final int maxConcurrentLocateRequestPerTable;<a name="line.85"></a>
-<span class="sourceLineNo">086</span><a name="line.86"></a>
-<span class="sourceLineNo">087</span> private final int locatePrefetchLimit;<a name="line.87"></a>
-<span class="sourceLineNo">088</span><a name="line.88"></a>
-<span class="sourceLineNo">089</span> private final ConcurrentMap<TableName, TableCache> cache = new ConcurrentHashMap<>();<a name="line.89"></a>
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-<span class="sourceLineNo">091</span> private static final class LocateRequest {<a name="line.91"></a>
-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span> private final byte[] row;<a name="line.93"></a>
-<span class="sourceLineNo">094</span><a name="line.94"></a>
-<span class="sourceLineNo">095</span> private final RegionLocateType locateType;<a name="line.95"></a>
-<span class="sourceLineNo">096</span><a name="line.96"></a>
-<span class="sourceLineNo">097</span> public LocateRequest(byte[] row, RegionLocateType locateType) {<a name="line.97"></a>
-<span class="sourceLineNo">098</span> this.row = row;<a name="line.98"></a>
-<span class="sourceLineNo">099</span> this.locateType = locateType;<a name="line.99"></a>
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-<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span> @Override<a name="line.102"></a>
-<span class="sourceLineNo">103</span> public int hashCode() {<a name="line.103"></a>
-<span class="sourceLineNo">104</span> return Bytes.hashCode(row) ^ locateType.hashCode();<a name="line.104"></a>
-<span class="sourceLineNo">105</span> }<a name="line.105"></a>
-<span class="sourceLineNo">106</span><a name="line.106"></a>
-<span class="sourceLineNo">107</span> @Override<a name="line.107"></a>
-<span class="sourceLineNo">108</span> public boolean equals(Object obj) {<a name="line.108"></a>
-<span class="sourceLineNo">109</span> if (obj == null || obj.getClass() != LocateRequest.class) {<a name="line.109"></a>
-<span class="sourceLineNo">110</span> return false;<a name="line.110"></a>
-<span class="sourceLineNo">111</span> }<a name="line.111"></a>
-<span class="sourceLineNo">112</span> LocateRequest that = (LocateRequest) obj;<a name="line.112"></a>
-<span class="sourceLineNo">113</span> return locateType.equals(that.locateType) && Bytes.equals(row, that.row);<a name="line.113"></a>
-<span class="sourceLineNo">114</span> }<a name="line.114"></a>
-<span class="sourceLineNo">115</span> }<a name="line.115"></a>
-<span class="sourceLineNo">116</span><a name="line.116"></a>
-<span class="sourceLineNo">117</span> private static final class TableCache {<a name="line.117"></a>
-<span class="sourceLineNo">118</span><a name="line.118"></a>
-<span class="sourceLineNo">119</span> private final ConcurrentNavigableMap<byte[], RegionLocations> cache =<a name="line.119"></a>
-<span class="sourceLineNo">120</span> new ConcurrentSkipListMap<>(BYTES_COMPARATOR);<a name="line.120"></a>
-<span class="sourceLineNo">121</span><a name="line.121"></a>
-<span class="sourceLineNo">122</span> private final Set<LocateRequest> pendingRequests = new HashSet<>();<a name="line.122"></a>
-<span class="sourceLineNo">123</span><a name="line.123"></a>
-<span class="sourceLineNo">124</span> private final Map<LocateRequest, CompletableFuture<RegionLocations>> allRequests =<a name="line.124"></a>
-<span class="sourceLineNo">125</span> new LinkedHashMap<>();<a name="line.125"></a>
-<span class="sourceLineNo">126</span><a name="line.126"></a>
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-<span class="sourceLineNo">128</span> return pendingRequests.size() < max;<a name="line.128"></a>
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-<span class="sourceLineNo">130</span><a name="line.130"></a>
-<span class="sourceLineNo">131</span> public boolean isPending(LocateRequest req) {<a name="line.131"></a>
-<span class="sourceLineNo">132</span> return pendingRequests.contains(req);<a name="line.132"></a>
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-<span class="sourceLineNo">134</span><a name="line.134"></a>
-<span class="sourceLineNo">135</span> public void send(LocateRequest req) {<a name="line.135"></a>
-<span class="sourceLineNo">136</span> pendingRequests.add(req);<a name="line.136"></a>
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-<span class="sourceLineNo">138</span><a name="line.138"></a>
-<span class="sourceLineNo">139</span> public Optional<LocateRequest> getCandidate() {<a name="line.139"></a>
-<span class="sourceLineNo">140</span> return allRequests.keySet().stream().filter(r -> !isPending(r)).findFirst();<a name="line.140"></a>
-<span class="sourceLineNo">141</span> }<a name="line.141"></a>
-<span class="sourceLineNo">142</span><a name="line.142"></a>
-<span class="sourceLineNo">143</span> public void clearCompletedRequests(Optional<RegionLocations> locations) {<a name="line.143"></a>
-<span class="sourceLineNo">144</span> for (Iterator<Map.Entry<LocateRequest, CompletableFuture<RegionLocations>>> iter =<a name="line.144"></a>
-<span class="sourceLineNo">145</span> allRequests.entrySet().iterator(); iter.hasNext();) {<a name="line.145"></a>
-<span class="sourceLineNo">146</span> Map.Entry<LocateRequest, CompletableFuture<RegionLocations>> entry = iter.next();<a name="line.146"></a>
-<span class="sourceLineNo">147</span> if (tryComplete(entry.getKey(), entry.getValue(), locations)) {<a name="line.147"></a>
-<span class="sourceLineNo">148</span> iter.remove();<a name="line.148"></a>
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+<span class="sourceLineNo">027</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.isEmptyStopRow;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import static org.apache.hadoop.hbase.client.RegionInfo.createRegionName;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import static org.apache.hadoop.hbase.util.Bytes.BYTES_COMPARATOR;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;<a name="line.31"></a>
+<span class="sourceLineNo">032</span><a name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.io.IOException;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.Arrays;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import java.util.HashSet;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import java.util.Iterator;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import java.util.LinkedHashMap;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import java.util.Map;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import java.util.Optional;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import java.util.Set;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import java.util.concurrent.CompletableFuture;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentMap;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import java.util.concurrent.ConcurrentNavigableMap;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import java.util.concurrent.ConcurrentSkipListMap;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.commons.lang3.ObjectUtils;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.HConstants;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.TableName;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.TableNotFoundException;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.client.Scan.ReadType;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.slf4j.Logger;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.slf4j.LoggerFactory;<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
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+<span class="sourceLineNo">061</span>import org.apache.hbase.thirdparty.com.google.common.base.Objects;<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>/**<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * The asynchronous locator for regions other than meta.<a name="line.64"></a>
+<span class="sourceLineNo">065</span> */<a name="line.65"></a>
+<span class="sourceLineNo">066</span>@InterfaceAudience.Private<a name="line.66"></a>
+<span class="sourceLineNo">067</span>class AsyncNonMetaRegionLocator {<a name="line.67"></a>
+<span class="sourceLineNo">068</span><a name="line.68"></a>
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+<span class="sourceLineNo">070</span><a name="line.70"></a>
+<span class="sourceLineNo">071</span> @VisibleForTesting<a name="line.71"></a>
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+<span class="sourceLineNo">073</span> "hbase.client.meta.max.concurrent.locate.per.table";<a name="line.73"></a>
+<span class="sourceLineNo">074</span><a name="line.74"></a>
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+<span class="sourceLineNo">076</span><a name="line.76"></a>
+<span class="sourceLineNo">077</span> @VisibleForTesting<a name="line.77"></a>
+<span class="sourceLineNo">078</span> static String LOCATE_PREFETCH_LIMIT = "hbase.client.locate.prefetch.limit";<a name="line.78"></a>
+<span class="sourceLineNo">079</span><a name="line.79"></a>
+<span class="sourceLineNo">080</span> private static final int DEFAULT_LOCATE_PREFETCH_LIMIT = 10;<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
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+<span class="sourceLineNo">087</span><a name="line.87"></a>
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+<span class="sourceLineNo">102</span> public int hashCode() {<a name="line.102"></a>
+<span class="sourceLineNo">103</span> return Bytes.hashCode(row) ^ locateType.hashCode();<a name="line.103"></a>
+<span class="sourceLineNo">104</span> }<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span> @Override<a name="line.106"></a>
+<span class="sourceLineNo">107</span> public boolean equals(Object obj) {<a name="line.107"></a>
+<span class="sourceLineNo">108</span> if (obj == null || obj.getClass() != LocateRequest.class) {<a name="line.108"></a>
+<span class="sourceLineNo">109</span> return false;<a name="line.109"></a>
+<span class="sourceLineNo">110</span> }<a name="line.110"></a>
+<span class="sourceLineNo">111</span> LocateRequest that = (LocateRequest) obj;<a name="line.111"></a>
+<span class="sourceLineNo">112</span> return locateType.equals(that.locateType) && Bytes.equals(row, that.row);<a name="line.112"></a>
+<span class="sourceLineNo">113</span> }<a name="line.113"></a>
+<span class="sourceLineNo">114</span> }<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span> private static final class TableCache {<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
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+<span class="sourceLineNo">119</span> new ConcurrentSkipListMap<>(BYTES_COMPARATOR);<a name="line.119"></a>
+<span class="sourceLineNo">120</span><a name="line.120"></a>
+<span class="sourceLineNo">121</span> private final Set<LocateRequest> pendingRequests = new HashSet<>();<a name="line.121"></a>
+<span class="sourceLineNo">122</span><a name="line.122"></a>
+<span class="sourceLineNo">123</span> private final Map<LocateRequest, CompletableFuture<RegionLocations>> allRequests =<a name="line.123"></a>
+<span class="sourceLineNo">124</span> new LinkedHashMap<>();<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span> public boolean hasQuota(int max) {<a name="line.126"></a>
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+<span class="sourceLineNo">128</span> }<a name="line.128"></a>
+<span class="sourceLineNo">129</span><a name="line.129"></a>
+<span class="sourceLineNo">130</span> public boolean isPending(LocateRequest req) {<a name="line.130"></a>
+<span class="sourceLineNo">131</span> return pendingRequests.contains(req);<a name="line.131"></a>
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+<span class="sourceLineNo">133</span><a name="line.133"></a>
+<span class="sourceLineNo">134</span> public void send(LocateRequest req) {<a name="line.134"></a>
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+<span class="sourceLineNo">137</span><a name="line.137"></a>
+<span class="sourceLineNo">138</span> public Optional<LocateRequest> getCandidate() {<a name="line.138"></a>
+<span class="sourceLineNo">139</span> return allRequests.keySet().stream().filter(r -> !isPending(r)).findFirst();<a name="line.139"></a>
+<span class="sourceLineNo">140</span> }<a name="line.140"></a>
+<span class="sourceLineNo">141</span><a name="line.141"></a>
+<span class="sourceLineNo">142</span> public void clearCompletedRequests(Optional<RegionLocations> locations) {<a name="line.142"></a>
+<span class="sourceLineNo">143</span> for (Iterator<Map.Entry<LocateRequest, CompletableFuture<RegionLocations>>> iter =<a name="line.143"></a>
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+<span class="sourceLineNo">146</span> if (tryComplete(entry.getKey(), entry.getValue(), locations)) {<a name="line.146"></a>
+<span class="sourceLineNo">147</span> iter.remove();<a name="line.147"></a>
+<span class="sourceLineNo">148</span> }<a name="line.148"></a>
+<span class="sourceLineNo">149</span> }<a name="line.149"></a>
+<span class="sourceLineNo">150</span> }<a name="line.150"></a>
+<span class="sourceLineNo">151</span><a name="line.151"></a>
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+<span class="sourceLineNo">160</span> RegionLocations locs = locations.get();<a name="line.160"></a>
+<span class="sourceLineNo">161</span> HRegionLocation loc = ObjectUtils.firstNonNull(locs.getRegionLocations());<a name="line.161"></a>
+<span class="sourceLineNo">162</span> // we should at least have one location available, otherwise the request should fail and<a name="line.162"></a>
+<span class="sourceLineNo">163</span> // should not arrive here<a name="line.163"></a>
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+<span class="sourceLineNo">167</span> // for locating the row before current row, the common case is to find the previous region<a name="line.167"></a>
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+<span class="sourceLineNo">170</span> // (endKey > req.row && startKey < req.row). The two conditions are equal since startKey <<a name="line.170"></a>
+<span class="sourceLineNo">171</span> // endKey.<a name="line.171"></a>
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+<span class="sourceLineNo">173</span> completed =<a name="line.173"></a>
+<span class="sourceLineNo">174</span> c == 0 || (c > 0 && Bytes.compareTo(loc.getRegion().getStartKey(), req.row) < 0);<a name="line.174"></a>
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+<span class="sourceLineNo">176</span> completed = loc.getRegion().containsRow(req.row);<a name="line.176"></a>
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+<span class="sourceLineNo">178</span> if (completed) {<a name="line.178"></a>
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+<span class="sourceLineNo">185</span> }<a name="line.185"></a>
+<span class="sourceLineNo">186</span><a name="line.186"></a>
+<span class="sourceLineNo">187</span> AsyncNonMetaRegionLocator(AsyncConnectionImpl conn) {<a name="line.187"></a>
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+<span class="sourceLineNo">189</span> this.maxConcurrentLocateRequestPerTable = conn.getConfiguration().getInt(<a name="line.189"></a>
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-<span class="sourceLineNo">450</span> }<a name="line.450"></a>
-<span class="sourceLineNo">451</span> }<a name="line.451"></a>
-<span class="sourceLineNo">452</span> }<a name="line.452"></a>
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-<span class="sourceLineNo">460</span> ? locateRowBeforeInCache(tableCache, tableName, row, replicaId)<a name="line.460"></a>
-<span class="sourceLineNo">461</span> : locateRowInCache(tableCache, tableName, row, replicaId);<a name="line.461"></a>
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-<span class="sourceLineNo">464</span> // locateToPrevious is true means we will use the start key of a region to locate the region<a name="line.464"></a>
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-<span class="sourceLineNo">466</span> // AsyncRegionLocator.getPreviousRegionLocation.<a name="line.466"></a>
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-<span class="sourceLineNo">509</span> // algorithm to locate it.<a name="line.509"></a>
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-<span class="sourceLineNo">529</span> RegionLocations newLocs = removeRegionLocation(oldLocs, loc.getRegion().getReplicaId());<a name="line.529"></a>
-<span class="sourceLineNo">530</span> if (newLocs == null) {<a name="line.530"></a>
-<span class="sourceLineNo">531</span> if (tableCache.cache.remove(startKey, oldLocs)) {<a name="line.531"></a>
-<span class="sourceLineNo">532</span> return;<a name="line.532"></a>
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-<span class="sourceLineNo">534</span> } else {<a name="line.534"></a>
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-<span class="sourceLineNo">538</span> }<a name="line.538"></a>
-<span class="sourceLineNo">539</span> }<a name="line.539"></a>
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-<span class="sourceLineNo">541</span><a name="line.541"></a>
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-<span class="sourceLineNo">543</span> addToCache(getTableCache(loc.getRegion().getTable()), createRegionLocations(loc));<a name="line.543"></a>
-<span class="sourceLineNo">544</span> }<a name="line.544"></a>
-<span class="sourceLineNo">545</span><a name="line.545"></a>
-<span class="sourceLineNo">546</span> private HRegionLocation getCachedLocation(HRegionLocation loc) {<a name="line.546"></a>
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-<span class="sourceLineNo">548</span> if (tableCache == null) {<a name="line.548"></a>
-<span class="sourceLineNo">549</span> return null;<a name="line.549"></a>
-<span class="sourceLineNo">550</span> }<a name="line.550"></a>
-<span class="sourceLineNo">551</span> RegionLocations locs = tableCache.cache.get(loc.getRegion().getStartKey());<a name="line.551"></a>
-<span class="sourceLineNo">552</span> return locs != null ? locs.getRegionLocation(loc.getRegion().getReplicaId()) : null;<a name="line.552"></a>
+<span class="sourceLineNo">238</span> // check whether the regions are the same, this usually happens when table is split/merged, or<a name="line.238"></a>
+<span class="sourceLineNo">239</span> // deleted and recreated again.<a name="line.239"></a>
+<span class="sourceLineNo">240</span> RegionInfo region = locs.getRegionLocation().getRegion();<a name="line.240"></a>
+<span class="sourceLineNo">241</span> RegionInfo oldRegion = oldLocs.getRegionLocation().getRegion();<a name="line.241"></a>
+<span class="sourceLineNo">242</span> if (region.getEncodedName().equals(oldRegion.getEncodedName())) {<a name="line.242"></a>
+<span class="sourceLineNo">243</span> RegionLocations mergedLocs = oldLocs.mergeLocations(locs);<a name="line.243"></a>
+<span class="sourceLineNo">244</span> if (isEqual(mergedLocs, oldLocs)) {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> // the merged one is the same with the old one, give up<a name="line.245"></a>
+<span class="sourceLineNo">246</span> LOG.trace("Will not add {} to cache because the old value {} " +<a name="line.246"></a>
+<span class="sourceLineNo">247</span> " is newer than us or has the same server name." +<a name="line.247"></a>
+<span class="sourceLineNo">248</span> " Maybe it is updated before we replace it", locs, oldLocs);<a name="line.248"></a>
+<span class="sourceLineNo">249</span> return oldLocs;<a name="line.249"></a>
+<span class="sourceLineNo">250</span> }<a name="line.250"></a>
+<span class="sourceLineNo">251</span> if (tableCache.cache.replace(startKey, oldLocs, mergedLocs)) {<a name="line.251"></a>
+<span class="sourceLineNo">252</span> return mergedLocs;<a name="line.252"></a>
+<span class="sourceLineNo">253</span> }<a name="line.253"></a>
+<span class="sourceLineNo">254</span> } else {<a name="line.254"></a>
+<span class="sourceLineNo">255</span> // the region is different, here we trust the one we fetched. This maybe wrong but finally<a name="line.255"></a>
+<span class="sourceLineNo">256</span> // the upper layer can detect this and trigger removal of the wrong locations<a name="line.256"></a>
+<span class="sourceLineNo">257</span> if (LOG.isDebugEnabled()) {<a name="line.257"></a>
+<span class="sourceLineNo">258</span> LOG.debug("The newnly fetch region {} is different from the old one {} for row '{}'," +<a name="line.258"></a>
+<span class="sourceLineNo">259</span> " try replaing the old one...", region, oldRegion, Bytes.toStringBinary(startKey));<a name="line.259"></a>
+<span class="sourceLineNo">260</span> }<a name="line.260"></a>
+<span class="sourceLineNo">261</span> if (tableCache.cache.replace(startKey, oldLocs, locs)) {<a name="line.261"></a>
+<span class="sourceLineNo">262</span> return locs;<a name="line.262"></a>
+<span class="sourceLineNo">263</span> }<a name="line.263"></a>
+<span class="sourceLineNo">264</span> }<a name="line.264"></a>
+<span class="sourceLineNo">265</span> }<a name="line.265"></a>
+<span class="sourceLineNo">266</span> }<a name="line.266"></a>
+<span class="sourceLineNo">267</span><a name="line.267"></a>
+<span class="sourceLineNo">268</span> private void complete(TableName tableName, LocateRequest req, RegionLocations locs,<a name="line.268"></a>
+<span class="sourceLineNo">269</span> Throwable error) {<a name="line.269"></a>
+<span class="sourceLineNo">270</span> if (error != null) {<a name="line.270"></a>
+<span class="sourceLineNo">271</span> LOG.warn("Failed to locate region in '" + tableName + "', row='" +<a name="line.271"></a>
+<span class="sourceLineNo">272</span> Bytes.toStringBinary(req.row) + "', locateType=" + req.locateType, error);<a name="line.272"></a>
+<span class="sourceLineNo">273</span> }<a name="line.273"></a>
+<span class="sourceLineNo">274</span> Optional<LocateRequest> toSend = Optional.empty();<a name="line.274"></a>
+<span class="sourceLineNo">275</span> TableCache tableCache = getTableCache(tableName);<a name="line.275"></a>
+<span class="sourceLineNo">276</span> if (locs != null) {<a name="line.276"></a>
+<span class="sourceLineNo">277</span> RegionLocations addedLocs = addToCache(tableCache, locs);<a name="line.277"></a>
+<span class="sourceLineNo">278</span> synchronized (tableCache) {<a name="line.278"></a>
+<span class="sourceLineNo">279</span> tableCache.pendingRequests.remove(req);<a name="line.279"></a>
+<span class="sourceLineNo">280</span> tableCache.clearCompletedRequests(Optional.of(addedLocs));<a name="line.280"></a>
+<span class="sourceLineNo">281</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.281"></a>
+<span class="sourceLineNo">282</span> // quota to send a candidate request.<a name="line.282"></a>
+<span class="sourceLineNo">283</span> toSend = tableCache.getCandidate();<a name="line.283"></a>
+<span class="sourceLineNo">284</span> toSend.ifPresent(r -> tableCache.send(r));<a name="line.284"></a>
+<span class="sourceLineNo">285</span> }<a name="line.285"></a>
+<span class="sourceLineNo">286</span> toSend.ifPresent(r -> locateInMeta(tableName, r));<a name="line.286"></a>
+<span class="sourceLineNo">287</span> } else {<a name="line.287"></a>
+<span class="sourceLineNo">288</span> // we meet an error<a name="line.288"></a>
+<span class="sourceLineNo">289</span> assert error != null;<a name="line.289"></a>
+<span class="sourceLineNo">290</span> synchronized (tableCache) {<a name="line.290"></a>
+<span class="sourceLineNo">291</span> tableCache.pendingRequests.remove(req);<a name="line.291"></a>
+<span class="sourceLineNo">292</span> // fail the request itself, no matter whether it is a DoNotRetryIOException, as we have<a name="line.292"></a>
+<span class="sourceLineNo">293</span> // already retried several times<a name="line.293"></a>
+<span class="sourceLineNo">294</span> CompletableFuture<?> future = tableCache.allRequests.remove(req);<a name="line.294"></a>
+<span class="sourceLineNo">295</span> if (future != null) {<a name="line.295"></a>
+<span class="sourceLineNo">296</span> future.completeExceptionally(error);<a name="line.296"></a>
+<span class="sourceLineNo">297</span> }<a name="line.297"></a>
+<span class="sourceLineNo">298</span> tableCache.clearCompletedRequests(Optional.empty());<a name="line.298"></a>
+<span class="sourceLineNo">299</span> // Remove a complete locate request in a synchronized block, so the table cache must have<a name="line.299"></a>
+<span class="sourceLineNo">300</span> // quota to send a candidate request.<a name="line.300"></a>
+<span class="sourceLineNo">301</span> toSend = tableCache.getCandidate();<a name="line.301"></a>
+<span class="sourceLineNo">302</span> toSend.ifPresent(r -> tableCache.send(r));<a name="line.302"></a>
+<span class="sourceLineNo">303</span> }<a name="line.303"></a>
+<span class="sourceLineNo">304</span> toSend.ifPresent(r -> locateInMeta(tableName, r));<a name="line.304"></a>
+<span class="sourceLineNo">305</span> }<a name="line.305"></a>
+<span class="sourceLineNo">306</span> }<a name="line.306"></a>
+<span class="sourceLineNo">307</span><a name="line.307"></a>
+<span class="sourceLineNo">308</span> // return whether we should stop the scan<a name="line.308"></a>
+<span class="sourceLineNo">309</span> private boolean onScanNext(TableName tableName, LocateRequest req, Result result) {<a name="line.309"></a>
+<span class="sourceLineNo">310</span> RegionLocations locs = MetaTableAccessor.getRegionLocations(result);<a name="line.310"></a>
+<span class="sourceLineNo">311</span> if (LOG.isDebugEnabled()) {<a name="line.311"></a>
+<span class="sourceLineNo">312</span> LOG.debug("The fetched location of '{}', row='{}', locateType={} is {}", tableName,<a name="line.312"></a>
+<span class="sourceLineNo">313</span> Bytes.toStringBinary(req.row), req.locateType, locs);<a name="line.313"></a>
+<span class="sourceLineNo">314</span> }<a name="line.314"></a>
+<span class="sourceLineNo">315</span><a name="line.315"></a>
+<span class="sourceLineNo">316</span> // the default region location should always be presented when fetching from meta, otherwise<a name="line.316"></a>
+<span class="sourceLineNo">317</span> // let's fail the request.<a name="line.317"></a>
+<span class="sourceLineNo">318</span> if (locs == null || locs.getDefaultRegionLocation() == null) {<a name="line.318"></a>
+<span class="sourceLineNo">319</span> complete(tableName, req, null,<a name="line.319"></a>
+<span class="sourceLineNo">320</span> new HBaseIOException(String.format("No location found for '%s', row='%s', locateType=%s",<a name="line.320"></a>
+<span class="sourceLineNo">321</span> tableName, Bytes.toStringBinary(req.row), req.locateType)));<a name="line.321"></a>
+<span class="sourceLineNo">322</span> return true;<a name="line.322"></a>
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+<span class="sourceLineNo">324</span> HRegionLocation loc = locs.getDefaultRegionLocation();<a name="line.324"></a>
+<span class="sourceLineNo">325</span> RegionInfo info = loc.getRegion();<a name="line.325"></a>
+<span class="sourceLineNo">326</span> if (info == null) {<a name="line.326"></a>
+<span class="sourceLineNo">327</span> complete(tableName, req, null,<a name="line.327"></a>
+<span class="sourceLineNo">328</span> new HBaseIOException(String.format("HRegionInfo is null for '%s', row='%s', locateType=%s",<a name="line.328"></a>
+<span class="sourceLineNo">329</span> tableName, Bytes.toStringBinary(req.row), req.locateType)));<a name="line.329"></a>
+<span class="sourceLineNo">330</span> return true;<a name="line.330"></a>
+<span class="sourceLineNo">331</span> }<a name="line.331"></a>
+<span class="sourceLineNo">332</span> if (info.isSplitParent()) {<a name="line.332"></a>
+<span class="sourceLineNo">333</span> return false;<a name="line.333"></a>
+<span class="sourceLineNo">334</span> }<a name="line.334"></a>
+<span class="sourceLineNo">335</span> complete(tableName, req, locs, null);<a name="line.335"></a>
+<span class="sourceLineNo">336</span> return true;<a name="line.336"></a>
+<span class="sourceLineNo">337</span> }<a name="line.337"></a>
+<span class="sourceLineNo">338</span><a name="line.338"></a>
+<span class="sourceLineNo">339</span> private RegionLocations locateRowInCache(TableCache tableCache, TableName tableName, byte[] row,<a name="line.339"></a>
+<span class="sourceLineNo">340</span> int replicaId) {<a name="line.340"></a>
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+<span class="sourceLineNo">342</span> if (entry == null) {<a name="line.342"></a>
+<span class="sourceLineNo">343</span> return null;<a name="line.343"></a>
+<span class="sourceLineNo">344</span> }<a name="line.344"></a>
+<span class="sourceLineNo">345</span> RegionLocations locs = entry.getValue();<a name="line.345"></a>
+<span class="sourceLineNo">346</span> HRegionLocation loc = locs.getRegionLocation(replicaId);<a name="line.346"></a>
+<span class="sourceLineNo">347</span> if (loc == null) {<a name="line.347"></a>
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+<span class="sourceLineNo">574</span> TableCache tableCache = cache.remove(tableName);<a name="line.574"></a>
+<span class="sourceLineNo">575</span> if (tableCache == null) {<a name="line.575"></a>
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+<span class="sourceLineNo">577</span> }<a name="line.577"></a>
+<span class="sourceLineNo">578</span> synchronized (tableCache) {<a name="line.578"></a>
+<span class="sourceLineNo">579</span> if (!tableCache.allRequests.isEmpty()) {<a name="line.579"></a>
+<span class="sourceLineNo">580</span> IOException error = new IOException("Cache cleared");<a name="line.580"></a>
+<span class="sourceLineNo">581</span> tableCache.allRequests.values().forEach(f -> f.completeExceptionally(error));<a name="line.581"></a>
+<span class="sourceLineNo">582</span> }<a name="line.582"></a>
<span class="sourceLineNo">583</span> }<a name="line.583"></a>
-<span class="sourceLineNo">584</span> return locateRowInCache(tableCache, tableName, row, RegionReplicaUtil.DEFAULT_REPLICA_ID);<a name="line.584"></a>
-<span class="sourceLineNo">585</span> }<a name="line.585"></a>
-<span class="sourceLineNo">586</span>}<a name="line.586"></a>
+<span class="sourceLineNo">584</span> }<a name="line.584"></a>
+<span class="sourceLineNo">585</span><a name="line.585"></a>
+<span class="sourceLineNo">586</span> void clearCache() {<a name="line.586"></a>
+<span class="sourceLineNo">587</span> cache.clear();<a name="line.587"></a>
+<span class="sourceLineNo">588</span> }<a name="line.588"></a>
+<span class="sourceLineNo">589</span><a name="line.589"></a>
+<span class="sourceLineNo">590</span> // only used for testing whether we have cached the location for a region.<a name="line.590"></a>
+<span class="sourceLineNo">591</span> @VisibleForTesting<a name="line.591"></a>
+<span class="sourceLineNo">592</span> RegionLocations getRegionLocationInCache(TableName tableName, byte[] row) {<a name="line.592"></a>
+<span class="sourceLineNo">593</span> TableCache tableCache = cache.get(tableName);<a name="line.593"></a>
+<span class="sourceLineNo">594</span> if (tableCache == null) {<a name="line.594"></a>
+<span class="sourceLineNo">595</span> return null;<a name="line.595"></a>
+<span class="sourceLineNo">596</span> }<a name="line.596"></a>
+<span class="sourceLineNo">597</span> return locateRowInCache(tableCache, tableName, row, RegionReplicaUtil.DEFAULT_REPLICA_ID);<a name="line.597"></a>
+<span class="sourceLineNo">598</span> }<a name="line.598"></a>
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index c54f391..b52a9c5 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncRegionLocatorHelper.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncRegionLocatorHelper.html
@@ -137,28 +137,14 @@
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-<span class="sourceLineNo">142</span> locs.mergeLocations(oldLocs);<a name="line.142"></a>
-<span class="sourceLineNo">143</span> return locs;<a name="line.143"></a>
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-<span class="sourceLineNo">145</span><a name="line.145"></a>
-<span class="sourceLineNo">146</span> static boolean isGood(RegionLocations locs, int replicaId) {<a name="line.146"></a>
-<span class="sourceLineNo">147</span> if (locs == null) {<a name="line.147"></a>
-<span class="sourceLineNo">148</span> return false;<a name="line.148"></a>
-<span class="sourceLineNo">149</span> }<a name="line.149"></a>
-<span class="sourceLineNo">150</span> HRegionLocation loc = locs.getRegionLocation(replicaId);<a name="line.150"></a>
-<span class="sourceLineNo">151</span> return loc != null && loc.getServerName() != null;<a name="line.151"></a>
-<span class="sourceLineNo">152</span> }<a name="line.152"></a>
-<span class="sourceLineNo">153</span>}<a name="line.153"></a>
+<span class="sourceLineNo">132</span> static boolean isGood(RegionLocations locs, int replicaId) {<a name="line.132"></a>
+<span class="sourceLineNo">133</span> if (locs == null) {<a name="line.133"></a>
+<span class="sourceLineNo">134</span> return false;<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<a name="line.135"></a>
+<span class="sourceLineNo">136</span> HRegionLocation loc = locs.getRegionLocation(replicaId);<a name="line.136"></a>
+<span class="sourceLineNo">137</span> return loc != null && loc.getServerName() != null;<a name="line.137"></a>
+<span class="sourceLineNo">138</span> }<a name="line.138"></a>
+<span class="sourceLineNo">139</span>}<a name="line.139"></a>
diff --git a/downloads.html b/downloads.html
index 7990254..0ca0833 100644
--- a/downloads.html
+++ b/downloads.html
@@ -335,7 +335,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/export_control.html b/export_control.html
index d5c1963..e6d3c17 100644
--- a/export_control.html
+++ b/export_control.html
@@ -187,7 +187,7 @@ for more details.</p>
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/index.html b/index.html
index 87c1e7a..0576008 100644
--- a/index.html
+++ b/index.html
@@ -267,7 +267,7 @@ Apache HBase is an open-source, distributed, versioned, non-relational database
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/issue-management.html b/issue-management.html
index 9f81756..71afd1e 100644
--- a/issue-management.html
+++ b/issue-management.html
@@ -159,7 +159,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/licenses.html b/licenses.html
index 2164792..9424a27 100644
--- a/licenses.html
+++ b/licenses.html
@@ -362,7 +362,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/mailing-lists.html b/mailing-lists.html
index b1af35d..3c7a147 100644
--- a/mailing-lists.html
+++ b/mailing-lists.html
@@ -212,7 +212,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/metrics.html b/metrics.html
index f007376..941e08e 100644
--- a/metrics.html
+++ b/metrics.html
@@ -315,7 +315,7 @@ export HBASE_REGIONSERVER_OPTS="$HBASE_JMX_OPTS -Dcom.sun.management.jmxrem
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/old_news.html b/old_news.html
index e40815a..c22718a 100644
--- a/old_news.html
+++ b/old_news.html
@@ -296,7 +296,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/plugin-management.html b/plugin-management.html
index 6a882e9..3b5a6c8 100644
--- a/plugin-management.html
+++ b/plugin-management.html
@@ -319,7 +319,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/plugins.html b/plugins.html
index 2ad9e35..e810583 100644
--- a/plugins.html
+++ b/plugins.html
@@ -238,7 +238,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/poweredbyhbase.html b/poweredbyhbase.html
index 44fa90e..a36f96c 100644
--- a/poweredbyhbase.html
+++ b/poweredbyhbase.html
@@ -625,7 +625,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/project-info.html b/project-info.html
index 29bb901..c2a4927 100644
--- a/project-info.html
+++ b/project-info.html
@@ -203,7 +203,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/project-reports.html b/project-reports.html
index a32b2ed..0a2834c 100644
--- a/project-reports.html
+++ b/project-reports.html
@@ -176,7 +176,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/pseudo-distributed.html b/pseudo-distributed.html
index d2bcd56..f022f44 100644
--- a/pseudo-distributed.html
+++ b/pseudo-distributed.html
@@ -164,7 +164,7 @@ Running Apache HBase (TM) in pseudo-distributed mode
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/replication.html b/replication.html
index c5f6a11..f6eeacd 100644
--- a/replication.html
+++ b/replication.html
@@ -159,7 +159,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/resources.html b/resources.html
index 807c2bd..63127be 100644
--- a/resources.html
+++ b/resources.html
@@ -187,7 +187,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/scm.html b/scm.html
index e379c14..f3b7185 100644
--- a/scm.html
+++ b/scm.html
@@ -170,7 +170,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/sponsors.html b/sponsors.html
index b8de082..389852a 100644
--- a/sponsors.html
+++ b/sponsors.html
@@ -189,7 +189,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/summary.html b/summary.html
index 4a9736a..38a48e7 100644
--- a/summary.html
+++ b/summary.html
@@ -202,7 +202,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/supportingprojects.html b/supportingprojects.html
index 0de0783..bb8b0bf 100644
--- a/supportingprojects.html
+++ b/supportingprojects.html
@@ -376,7 +376,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/team.html b/team.html
index 28773db..cc36e76 100644
--- a/team.html
+++ b/team.html
@@ -643,7 +643,7 @@
<div class="row">
<p>Copyright ©2007–2019
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
-All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-25</li>
+All rights reserved. <li id="publishDate" class="pull-right">Last Published: 2019-02-26</li>
</p>
</div>
<p id="poweredBy" class="pull-right"><a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"><img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" /></a>
diff --git a/testdevapidocs/allclasses-frame.html b/testdevapidocs/allclasses-frame.html
index 5ca696b..2f628cc 100644
--- a/testdevapidocs/allclasses-frame.html
+++ b/testdevapidocs/allclasses-frame.html
@@ -679,6 +679,7 @@
<li><a href="org/apache/hadoop/hbase/client/TestAsyncTableGetMultiThreadedWithBasicCompaction.html" title="class in org.apache.hadoop.hbase.client" target="classFrame">TestAsyncTableGetMultiThreadedWithBasicCompaction</a></li>
<li><a href="org/apache/hadoop/hbase/client/TestAsyncTableGetMultiThreadedWithEagerCompaction.html" title="class in org.apache.hadoop.hbase.client" target="classFrame">TestAsyncTableGetMultiThreadedWithEagerCompaction</a></li>
<li><a href="org/apache/hadoop/hbase/client/TestAsyncTableLocatePrefetch.html" title="class in org.apache.hadoop.hbase.client" target="classFrame">TestAsyncTableLocatePrefetch</a></li>
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<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/client/TestAsyncTable.html#ASYNC_CONN">ASYNC_CONN</a></span> - Static variable in class org.apache.hadoop.hbase.client.<a href="org/apache/hadoop/hbase/client/TestAsyncTable.html" title="class in org.apache.hadoop.hbase.client">TestAsyncTable</a></dt>
<dd> </dd>
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<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/client/TestAsyncTableNoncedRetry.html#ASYNC_CONN">ASYNC_CONN</a></span> - Static variable in class org.apache.hadoop.hbase.client.<a href="org/apache/hadoop/hbase/client/TestAsyncTableNoncedRetry.html" title="class in org.apache.hadoop.hbase.client">TestAsyncTableNoncedRetry</a></dt>
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<dd> </dd>
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<dt><span class="memberNameLink"><a href="org/apache/hadoop/hbase/client/TestAsyncTableNoncedRetry.html#CLASS_RULE">CLASS_RULE</a></span> - Static variable in class org.apache.hadoop.hbase.client.<a href="org/apache/hadoop/hbase/client/TestAsyncTableNoncedRetry.html" title="class in org.apache.hadoop.hbase.client">TestAsyncTableNoncedRetry</a></dt>
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<dd> </dd>
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<dd> </dd>
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<dd> </dd>
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<dd> </dd>
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<dd> </dd>
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<div class="block">Testcase for HBASE-21732.</div>
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<div class="block">Run tests that use the HBase clients; <code>Table</code>.</div>
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<div class="block">Testcase for HBASE-19608.</div>
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<div class="block">Testcase for HBASE-21032, where use the wrong readType from a Scan instance which is actually a
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<div class="block">Class to test HBaseHbck.</div>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestIncrement.html" title="class in org.apache.hadoop.hbase.client">TestIncrement</a></td>
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<div class="block">Test all <code>Increment</code> client operations with a coprocessor that
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<div class="block">Run Increment tests that use the HBase clients; <code>HTable</code>.</div>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestInterfaceAlign.html" title="class in org.apache.hadoop.hbase.client">TestInterfaceAlign</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestIntraRowPagination.html" title="class in org.apache.hadoop.hbase.client">TestIntraRowPagination</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestLeaseRenewal.html" title="class in org.apache.hadoop.hbase.client">TestLeaseRenewal</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestLimitedScanWithFilter.html" title="class in org.apache.hadoop.hbase.client">TestLimitedScanWithFilter</a></td>
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<div class="block">With filter we may stop at a middle of row and think that we still have more cells for the
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestMetaCache.html" title="class in org.apache.hadoop.hbase.client">TestMetaCache</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestMobSnapshotCloneIndependence.html" title="class in org.apache.hadoop.hbase.client">TestMobSnapshotCloneIndependence</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestMultiActionMetricsFromClient.html" title="class in org.apache.hadoop.hbase.client">TestMultiActionMetricsFromClient</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestMultiParallel.html" title="class in org.apache.hadoop.hbase.client">TestMultiParallel</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestMultiParallel.MyMasterObserver.html" title="class in org.apache.hadoop.hbase.client">TestMultiParallel.MyMasterObserver</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestMultipleTimestamps.html" title="class in org.apache.hadoop.hbase.client">TestMultipleTimestamps</a></td>
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<td class="colFirst"><a href="../../../../../org/apache/hadoop/hbase/client/TestMultiRespectsLimits.html" title="class in org.apache.hadoop.hbase.client">TestMultiRespectsLimits</a></td>
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+<span class="sourceLineNo">042</span>public class TestAsyncTableLocateRegionForDeletedTable {<a name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span> @ClassRule<a name="line.44"></a>
+<span class="sourceLineNo">045</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.45"></a>
+<span class="sourceLineNo">046</span> HBaseClassTestRule.forClass(TestAsyncTableLocateRegionForDeletedTable.class);<a name="line.46"></a>
+<span class="sourceLineNo">047</span><a name="line.47"></a>
+<span class="sourceLineNo">048</span> private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();<a name="line.48"></a>
+<span class="sourceLineNo">049</span><a name="line.49"></a>
+<span class="sourceLineNo">050</span> private static TableName TABLE_NAME = TableName.valueOf("async");<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span> private static byte[] FAMILY = Bytes.toBytes("cf");<a name="line.52"></a>
+<span class="sourceLineNo">053</span><a name="line.53"></a>
+<span class="sourceLineNo">054</span> private static byte[] QUALIFIER = Bytes.toBytes("cq");<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span> private static byte[] VALUE = Bytes.toBytes("value");<a name="line.56"></a>
+<span class="sourceLineNo">057</span><a name="line.57"></a>
+<span class="sourceLineNo">058</span> private static AsyncConnection ASYNC_CONN;<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
+<span class="sourceLineNo">060</span> @BeforeClass<a name="line.60"></a>
+<span class="sourceLineNo">061</span> public static void setUpBeforeClass() throws Exception {<a name="line.61"></a>
+<span class="sourceLineNo">062</span> TEST_UTIL.startMiniCluster(3);<a name="line.62"></a>
+<span class="sourceLineNo">063</span> TEST_UTIL.createTable(TABLE_NAME, FAMILY);<a name="line.63"></a>
+<span class="sourceLineNo">064</span> TEST_UTIL.waitTableAvailable(TABLE_NAME);<a name="line.64"></a>
+<span class="sourceLineNo">065</span> TEST_UTIL.getAdmin().balancerSwitch(false, true);<a name="line.65"></a>
+<span class="sourceLineNo">066</span> ASYNC_CONN = ConnectionFactory.createAsyncConnection(TEST_UTIL.getConfiguration()).get();<a name="line.66"></a>
+<span class="sourceLineNo">067</span> assertFalse(ASYNC_CONN.isClosed());<a name="line.67"></a>
+<span class="sourceLineNo">068</span> }<a name="line.68"></a>
+<span class="sourceLineNo">069</span><a name="line.69"></a>
+<span class="sourceLineNo">070</span> @AfterClass<a name="line.70"></a>
+<span class="sourceLineNo">071</span> public static void tearDownAfterClass() throws Exception {<a name="line.71"></a>
+<span class="sourceLineNo">072</span> IOUtils.closeQuietly(ASYNC_CONN);<a name="line.72"></a>
+<span class="sourceLineNo">073</span> assertTrue(ASYNC_CONN.isClosed());<a name="line.73"></a>
+<span class="sourceLineNo">074</span> TEST_UTIL.shutdownMiniCluster();<a name="line.74"></a>
+<span class="sourceLineNo">075</span> }<a name="line.75"></a>
+<span class="sourceLineNo">076</span><a name="line.76"></a>
+<span class="sourceLineNo">077</span> @Test<a name="line.77"></a>
+<span class="sourceLineNo">078</span> public void test() throws IOException, InterruptedException {<a name="line.78"></a>
+<span class="sourceLineNo">079</span> try (Table table = TEST_UTIL.getConnection().getTable(TABLE_NAME)) {<a name="line.79"></a>
+<span class="sourceLineNo">080</span> for (int i = 0; i < 100; i++) {<a name="line.80"></a>
+<span class="sourceLineNo">081</span> table.put(new Put(Bytes.toBytes(i)).addColumn(FAMILY, QUALIFIER, VALUE));<a name="line.81"></a>
+<span class="sourceLineNo">082</span> }<a name="line.82"></a>
+<span class="sourceLineNo">083</span> }<a name="line.83"></a>
+<span class="sourceLineNo">084</span> TEST_UTIL.getAdmin().split(TABLE_NAME, Bytes.toBytes(50));<a name="line.84"></a>
+<span class="sourceLineNo">085</span> TEST_UTIL.waitFor(60000,<a name="line.85"></a>
+<span class="sourceLineNo">086</span> () -> TEST_UTIL.getMiniHBaseCluster().getRegions(TABLE_NAME).size() == 2);<a name="line.86"></a>
+<span class="sourceLineNo">087</span> // make sure we can access the split regions<a name="line.87"></a>
+<span class="sourceLineNo">088</span> try (Table table = TEST_UTIL.getConnection().getTable(TABLE_NAME)) {<a name="line.88"></a>
+<span class="sourceLineNo">089</span> for (int i = 0; i < 100; i++) {<a name="line.89"></a>
+<span class="sourceLineNo">090</span> assertFalse(table.get(new Get(Bytes.toBytes(i))).isEmpty());<a name="line.90"></a>
+<span class="sourceLineNo">091</span> }<a name="line.91"></a>
+<span class="sourceLineNo">092</span> }<a name="line.92"></a>
+<span class="sourceLineNo">093</span> // let's cache the two old locations<a name="line.93"></a>
+<span class="sourceLineNo">094</span> AsyncTableRegionLocator locator = ASYNC_CONN.getRegionLocator(TABLE_NAME);<a name="line.94"></a>
+<span class="sourceLineNo">095</span> locator.getRegionLocation(Bytes.toBytes(0)).join();<a name="line.95"></a>
+<span class="sourceLineNo">096</span> locator.getRegionLocation(Bytes.toBytes(99)).join();<a name="line.96"></a>
+<span class="sourceLineNo">097</span> // recreate the table<a name="line.97"></a>
+<span class="sourceLineNo">098</span> TEST_UTIL.getAdmin().disableTable(TABLE_NAME);<a name="line.98"></a>
+<span class="sourceLineNo">099</span> TEST_UTIL.getAdmin().deleteTable(TABLE_NAME);<a name="line.99"></a>
+<span class="sourceLineNo">100</span> TEST_UTIL.createTable(TABLE_NAME, FAMILY);<a name="line.100"></a>
+<span class="sourceLineNo">101</span> TEST_UTIL.waitTableAvailable(TABLE_NAME);<a name="line.101"></a>
+<span class="sourceLineNo">102</span> // confirm that we can still get the correct location<a name="line.102"></a>
+<span class="sourceLineNo">103</span> assertFalse(ASYNC_CONN.getTable(TABLE_NAME).exists(new Get(Bytes.toBytes(99))).join());<a name="line.103"></a>
+<span class="sourceLineNo">104</span> }<a name="line.104"></a>
+<span class="sourceLineNo">105</span>}<a name="line.105"></a>
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+</html>