You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/12/25 14:50:56 UTC
[24/29] hbase-site git commit: Published site at
44dec60054d1c45880d591c74a023f7a534e6d73.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/70f4ddbc/devapidocs/src-html/org/apache/hadoop/hbase/master/DeadServer.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/DeadServer.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/DeadServer.html
index da85524..7acd928 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/DeadServer.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/DeadServer.html
@@ -26,248 +26,247 @@
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.master;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
-<span class="sourceLineNo">021</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.21"></a>
-<span class="sourceLineNo">022</span>import org.slf4j.Logger;<a name="line.22"></a>
-<span class="sourceLineNo">023</span>import org.slf4j.LoggerFactory;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.ServerName;<a name="line.24"></a>
-<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.26"></a>
-<span class="sourceLineNo">027</span><a name="line.27"></a>
-<span class="sourceLineNo">028</span>import com.google.common.base.Preconditions;<a name="line.28"></a>
-<span class="sourceLineNo">029</span><a name="line.29"></a>
-<span class="sourceLineNo">030</span>import java.util.ArrayList;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import java.util.Collections;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import java.util.Comparator;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import java.util.Date;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import java.util.HashMap;<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.List;<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.Set;<a name="line.39"></a>
+<span class="sourceLineNo">021</span>import java.util.ArrayList;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.Collections;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.util.Comparator;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.Date;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.HashMap;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.HashSet;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import java.util.Iterator;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import java.util.List;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import java.util.Map;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import java.util.Set;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.ServerName;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.slf4j.Logger;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.slf4j.LoggerFactory;<a name="line.36"></a>
+<span class="sourceLineNo">037</span><a name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.38"></a>
+<span class="sourceLineNo">039</span><a name="line.39"></a>
<span class="sourceLineNo">040</span><a name="line.40"></a>
-<span class="sourceLineNo">041</span><a name="line.41"></a>
-<span class="sourceLineNo">042</span>/**<a name="line.42"></a>
-<span class="sourceLineNo">043</span> * Class to hold dead servers list and utility querying dead server list.<a name="line.43"></a>
-<span class="sourceLineNo">044</span> * On znode expiration, servers are added here.<a name="line.44"></a>
-<span class="sourceLineNo">045</span> */<a name="line.45"></a>
-<span class="sourceLineNo">046</span>@InterfaceAudience.Private<a name="line.46"></a>
-<span class="sourceLineNo">047</span>public class DeadServer {<a name="line.47"></a>
-<span class="sourceLineNo">048</span> private static final Logger LOG = LoggerFactory.getLogger(DeadServer.class);<a name="line.48"></a>
-<span class="sourceLineNo">049</span><a name="line.49"></a>
-<span class="sourceLineNo">050</span> /**<a name="line.50"></a>
-<span class="sourceLineNo">051</span> * Set of known dead servers. On znode expiration, servers are added here.<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * This is needed in case of a network partitioning where the server's lease<a name="line.52"></a>
-<span class="sourceLineNo">053</span> * expires, but the server is still running. After the network is healed,<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * and it's server logs are recovered, it will be told to call server startup<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * because by then, its regions have probably been reassigned.<a name="line.55"></a>
-<span class="sourceLineNo">056</span> */<a name="line.56"></a>
-<span class="sourceLineNo">057</span> private final Map<ServerName, Long> deadServers = new HashMap<>();<a name="line.57"></a>
-<span class="sourceLineNo">058</span><a name="line.58"></a>
-<span class="sourceLineNo">059</span> /**<a name="line.59"></a>
-<span class="sourceLineNo">060</span> * Set of dead servers currently being processed<a name="line.60"></a>
-<span class="sourceLineNo">061</span> */<a name="line.61"></a>
-<span class="sourceLineNo">062</span> private final Set<ServerName> processingServers = new HashSet<ServerName>();<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> * A dead server that comes back alive has a different start code. The new start code should be<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * greater than the old one, but we don't take this into account in this method.<a name="line.66"></a>
-<span class="sourceLineNo">067</span> *<a name="line.67"></a>
-<span class="sourceLineNo">068</span> * @param newServerName Servername as either <code>host:port</code> or<a name="line.68"></a>
-<span class="sourceLineNo">069</span> * <code>host,port,startcode</code>.<a name="line.69"></a>
-<span class="sourceLineNo">070</span> * @return true if this server was dead before and coming back alive again<a name="line.70"></a>
-<span class="sourceLineNo">071</span> */<a name="line.71"></a>
-<span class="sourceLineNo">072</span> public synchronized boolean cleanPreviousInstance(final ServerName newServerName) {<a name="line.72"></a>
-<span class="sourceLineNo">073</span> Iterator<ServerName> it = deadServers.keySet().iterator();<a name="line.73"></a>
-<span class="sourceLineNo">074</span> while (it.hasNext()) {<a name="line.74"></a>
-<span class="sourceLineNo">075</span> ServerName sn = it.next();<a name="line.75"></a>
-<span class="sourceLineNo">076</span> if (ServerName.isSameAddress(sn, newServerName)) {<a name="line.76"></a>
-<span class="sourceLineNo">077</span> // remove from deadServers<a name="line.77"></a>
-<span class="sourceLineNo">078</span> it.remove();<a name="line.78"></a>
-<span class="sourceLineNo">079</span> // remove from processingServers<a name="line.79"></a>
-<span class="sourceLineNo">080</span> boolean removed = processingServers.remove(sn);<a name="line.80"></a>
-<span class="sourceLineNo">081</span> if (removed) {<a name="line.81"></a>
-<span class="sourceLineNo">082</span> LOG.debug("Removed " + sn + " ; numProcessing=" + processingServers.size());<a name="line.82"></a>
-<span class="sourceLineNo">083</span> }<a name="line.83"></a>
-<span class="sourceLineNo">084</span> return true;<a name="line.84"></a>
-<span class="sourceLineNo">085</span> }<a name="line.85"></a>
-<span class="sourceLineNo">086</span> }<a name="line.86"></a>
-<span class="sourceLineNo">087</span><a name="line.87"></a>
-<span class="sourceLineNo">088</span> return false;<a name="line.88"></a>
-<span class="sourceLineNo">089</span> }<a name="line.89"></a>
-<span class="sourceLineNo">090</span><a name="line.90"></a>
-<span class="sourceLineNo">091</span> /**<a name="line.91"></a>
-<span class="sourceLineNo">092</span> * @param serverName server name.<a name="line.92"></a>
-<span class="sourceLineNo">093</span> * @return true if this server is on the dead servers list false otherwise<a name="line.93"></a>
-<span class="sourceLineNo">094</span> */<a name="line.94"></a>
-<span class="sourceLineNo">095</span> public synchronized boolean isDeadServer(final ServerName serverName) {<a name="line.95"></a>
-<span class="sourceLineNo">096</span> return deadServers.containsKey(serverName);<a name="line.96"></a>
-<span class="sourceLineNo">097</span> }<a name="line.97"></a>
-<span class="sourceLineNo">098</span><a name="line.98"></a>
-<span class="sourceLineNo">099</span> /**<a name="line.99"></a>
-<span class="sourceLineNo">100</span> * @param serverName server name.<a name="line.100"></a>
-<span class="sourceLineNo">101</span> * @return true if this server is on the processing servers list false otherwise<a name="line.101"></a>
-<span class="sourceLineNo">102</span> */<a name="line.102"></a>
-<span class="sourceLineNo">103</span> public synchronized boolean isProcessingServer(final ServerName serverName) {<a name="line.103"></a>
-<span class="sourceLineNo">104</span> return processingServers.contains(serverName);<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> /**<a name="line.107"></a>
-<span class="sourceLineNo">108</span> * Checks if there are currently any dead servers being processed by the<a name="line.108"></a>
-<span class="sourceLineNo">109</span> * master. Returns true if at least one region server is currently being<a name="line.109"></a>
-<span class="sourceLineNo">110</span> * processed as dead.<a name="line.110"></a>
-<span class="sourceLineNo">111</span> *<a name="line.111"></a>
-<span class="sourceLineNo">112</span> * @return true if any RS are being processed as dead<a name="line.112"></a>
-<span class="sourceLineNo">113</span> */<a name="line.113"></a>
-<span class="sourceLineNo">114</span> public synchronized boolean areDeadServersInProgress() {<a name="line.114"></a>
-<span class="sourceLineNo">115</span> return !processingServers.isEmpty();<a name="line.115"></a>
-<span class="sourceLineNo">116</span> }<a name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span> public synchronized Set<ServerName> copyServerNames() {<a name="line.118"></a>
-<span class="sourceLineNo">119</span> Set<ServerName> clone = new HashSet<>(deadServers.size());<a name="line.119"></a>
-<span class="sourceLineNo">120</span> clone.addAll(deadServers.keySet());<a name="line.120"></a>
-<span class="sourceLineNo">121</span> return clone;<a name="line.121"></a>
-<span class="sourceLineNo">122</span> }<a name="line.122"></a>
-<span class="sourceLineNo">123</span><a name="line.123"></a>
-<span class="sourceLineNo">124</span> /**<a name="line.124"></a>
-<span class="sourceLineNo">125</span> * Adds the server to the dead server list if it's not there already.<a name="line.125"></a>
-<span class="sourceLineNo">126</span> * @param sn the server name<a name="line.126"></a>
-<span class="sourceLineNo">127</span> */<a name="line.127"></a>
-<span class="sourceLineNo">128</span> public synchronized void add(ServerName sn) {<a name="line.128"></a>
-<span class="sourceLineNo">129</span> if (!deadServers.containsKey(sn)){<a name="line.129"></a>
-<span class="sourceLineNo">130</span> deadServers.put(sn, EnvironmentEdgeManager.currentTime());<a name="line.130"></a>
-<span class="sourceLineNo">131</span> }<a name="line.131"></a>
-<span class="sourceLineNo">132</span> boolean added = processingServers.add(sn);<a name="line.132"></a>
-<span class="sourceLineNo">133</span> if (LOG.isDebugEnabled() && added) {<a name="line.133"></a>
-<span class="sourceLineNo">134</span> LOG.debug("Added " + sn + "; numProcessing=" + processingServers.size());<a name="line.134"></a>
-<span class="sourceLineNo">135</span> }<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> /**<a name="line.138"></a>
-<span class="sourceLineNo">139</span> * Notify that we started processing this dead server.<a name="line.139"></a>
-<span class="sourceLineNo">140</span> * @param sn ServerName for the dead server.<a name="line.140"></a>
-<span class="sourceLineNo">141</span> */<a name="line.141"></a>
-<span class="sourceLineNo">142</span> public synchronized void notifyServer(ServerName sn) {<a name="line.142"></a>
-<span class="sourceLineNo">143</span> boolean added = processingServers.add(sn);<a name="line.143"></a>
-<span class="sourceLineNo">144</span> if (LOG.isDebugEnabled()) {<a name="line.144"></a>
-<span class="sourceLineNo">145</span> if (added) {<a name="line.145"></a>
-<span class="sourceLineNo">146</span> LOG.debug("Added " + sn + "; numProcessing=" + processingServers.size());<a name="line.146"></a>
-<span class="sourceLineNo">147</span> }<a name="line.147"></a>
-<span class="sourceLineNo">148</span> LOG.debug("Started processing " + sn + "; numProcessing=" + processingServers.size());<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> * Complete processing for this dead server.<a name="line.153"></a>
-<span class="sourceLineNo">154</span> * @param sn ServerName for the dead server.<a name="line.154"></a>
-<span class="sourceLineNo">155</span> */<a name="line.155"></a>
-<span class="sourceLineNo">156</span> public synchronized void finish(ServerName sn) {<a name="line.156"></a>
-<span class="sourceLineNo">157</span> boolean removed = processingServers.remove(sn);<a name="line.157"></a>
-<span class="sourceLineNo">158</span> if (LOG.isDebugEnabled()) {<a name="line.158"></a>
-<span class="sourceLineNo">159</span> LOG.debug("Finished processing " + sn + "; numProcessing=" + processingServers.size());<a name="line.159"></a>
-<span class="sourceLineNo">160</span> if (removed) {<a name="line.160"></a>
-<span class="sourceLineNo">161</span> LOG.debug("Removed " + sn + " ; numProcessing=" + processingServers.size());<a name="line.161"></a>
-<span class="sourceLineNo">162</span> }<a name="line.162"></a>
-<span class="sourceLineNo">163</span> }<a name="line.163"></a>
-<span class="sourceLineNo">164</span> }<a name="line.164"></a>
-<span class="sourceLineNo">165</span><a name="line.165"></a>
-<span class="sourceLineNo">166</span> public synchronized int size() {<a name="line.166"></a>
-<span class="sourceLineNo">167</span> return deadServers.size();<a name="line.167"></a>
-<span class="sourceLineNo">168</span> }<a name="line.168"></a>
-<span class="sourceLineNo">169</span><a name="line.169"></a>
-<span class="sourceLineNo">170</span> public synchronized boolean isEmpty() {<a name="line.170"></a>
-<span class="sourceLineNo">171</span> return deadServers.isEmpty();<a name="line.171"></a>
-<span class="sourceLineNo">172</span> }<a name="line.172"></a>
-<span class="sourceLineNo">173</span><a name="line.173"></a>
-<span class="sourceLineNo">174</span> public synchronized void cleanAllPreviousInstances(final ServerName newServerName) {<a name="line.174"></a>
-<span class="sourceLineNo">175</span> Iterator<ServerName> it = deadServers.keySet().iterator();<a name="line.175"></a>
-<span class="sourceLineNo">176</span> while (it.hasNext()) {<a name="line.176"></a>
-<span class="sourceLineNo">177</span> ServerName sn = it.next();<a name="line.177"></a>
-<span class="sourceLineNo">178</span> if (ServerName.isSameAddress(sn, newServerName)) {<a name="line.178"></a>
-<span class="sourceLineNo">179</span> // remove from deadServers<a name="line.179"></a>
-<span class="sourceLineNo">180</span> it.remove();<a name="line.180"></a>
-<span class="sourceLineNo">181</span> // remove from processingServers<a name="line.181"></a>
-<span class="sourceLineNo">182</span> boolean removed = processingServers.remove(sn);<a name="line.182"></a>
-<span class="sourceLineNo">183</span> if (removed) {<a name="line.183"></a>
-<span class="sourceLineNo">184</span> LOG.debug("Removed " + sn + " ; numProcessing=" + processingServers.size());<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> }<a name="line.188"></a>
-<span class="sourceLineNo">189</span><a name="line.189"></a>
-<span class="sourceLineNo">190</span> @Override<a name="line.190"></a>
-<span class="sourceLineNo">191</span> public synchronized String toString() {<a name="line.191"></a>
-<span class="sourceLineNo">192</span> // Display unified set of servers from both maps<a name="line.192"></a>
-<span class="sourceLineNo">193</span> Set<ServerName> servers = new HashSet<ServerName>();<a name="line.193"></a>
-<span class="sourceLineNo">194</span> servers.addAll(deadServers.keySet());<a name="line.194"></a>
-<span class="sourceLineNo">195</span> servers.addAll(processingServers);<a name="line.195"></a>
-<span class="sourceLineNo">196</span> StringBuilder sb = new StringBuilder();<a name="line.196"></a>
-<span class="sourceLineNo">197</span> for (ServerName sn : servers) {<a name="line.197"></a>
-<span class="sourceLineNo">198</span> if (sb.length() > 0) {<a name="line.198"></a>
-<span class="sourceLineNo">199</span> sb.append(", ");<a name="line.199"></a>
-<span class="sourceLineNo">200</span> }<a name="line.200"></a>
-<span class="sourceLineNo">201</span> sb.append(sn.toString());<a name="line.201"></a>
-<span class="sourceLineNo">202</span> // Star entries that are being processed<a name="line.202"></a>
-<span class="sourceLineNo">203</span> if (processingServers.contains(sn)) {<a name="line.203"></a>
-<span class="sourceLineNo">204</span> sb.append("*");<a name="line.204"></a>
-<span class="sourceLineNo">205</span> }<a name="line.205"></a>
-<span class="sourceLineNo">206</span> }<a name="line.206"></a>
-<span class="sourceLineNo">207</span> return sb.toString();<a name="line.207"></a>
-<span class="sourceLineNo">208</span> }<a name="line.208"></a>
-<span class="sourceLineNo">209</span><a name="line.209"></a>
-<span class="sourceLineNo">210</span> /**<a name="line.210"></a>
-<span class="sourceLineNo">211</span> * Extract all the servers dead since a given time, and sort them.<a name="line.211"></a>
-<span class="sourceLineNo">212</span> * @param ts the time, 0 for all<a name="line.212"></a>
-<span class="sourceLineNo">213</span> * @return a sorted array list, by death time, lowest values first.<a name="line.213"></a>
-<span class="sourceLineNo">214</span> */<a name="line.214"></a>
-<span class="sourceLineNo">215</span> public synchronized List<Pair<ServerName, Long>> copyDeadServersSince(long ts){<a name="line.215"></a>
-<span class="sourceLineNo">216</span> List<Pair<ServerName, Long>> res = new ArrayList<>(size());<a name="line.216"></a>
-<span class="sourceLineNo">217</span><a name="line.217"></a>
-<span class="sourceLineNo">218</span> for (Map.Entry<ServerName, Long> entry:deadServers.entrySet()){<a name="line.218"></a>
-<span class="sourceLineNo">219</span> if (entry.getValue() >= ts){<a name="line.219"></a>
-<span class="sourceLineNo">220</span> res.add(new Pair<>(entry.getKey(), entry.getValue()));<a name="line.220"></a>
-<span class="sourceLineNo">221</span> }<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> Collections.sort(res, ServerNameDeathDateComparator);<a name="line.224"></a>
-<span class="sourceLineNo">225</span> return res;<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> /**<a name="line.228"></a>
-<span class="sourceLineNo">229</span> * Get the time when a server died<a name="line.229"></a>
-<span class="sourceLineNo">230</span> * @param deadServerName the dead server name<a name="line.230"></a>
-<span class="sourceLineNo">231</span> * @return the date when the server died <a name="line.231"></a>
-<span class="sourceLineNo">232</span> */<a name="line.232"></a>
-<span class="sourceLineNo">233</span> public synchronized Date getTimeOfDeath(final ServerName deadServerName){<a name="line.233"></a>
-<span class="sourceLineNo">234</span> Long time = deadServers.get(deadServerName);<a name="line.234"></a>
-<span class="sourceLineNo">235</span> return time == null ? null : new Date(time);<a name="line.235"></a>
-<span class="sourceLineNo">236</span> }<a name="line.236"></a>
-<span class="sourceLineNo">237</span><a name="line.237"></a>
-<span class="sourceLineNo">238</span> private static Comparator<Pair<ServerName, Long>> ServerNameDeathDateComparator =<a name="line.238"></a>
-<span class="sourceLineNo">239</span> new Comparator<Pair<ServerName, Long>>(){<a name="line.239"></a>
-<span class="sourceLineNo">240</span><a name="line.240"></a>
-<span class="sourceLineNo">241</span> @Override<a name="line.241"></a>
-<span class="sourceLineNo">242</span> public int compare(Pair<ServerName, Long> o1, Pair<ServerName, Long> o2) {<a name="line.242"></a>
-<span class="sourceLineNo">243</span> return o1.getSecond().compareTo(o2.getSecond());<a name="line.243"></a>
-<span class="sourceLineNo">244</span> }<a name="line.244"></a>
-<span class="sourceLineNo">245</span> };<a name="line.245"></a>
-<span class="sourceLineNo">246</span><a name="line.246"></a>
-<span class="sourceLineNo">247</span> /**<a name="line.247"></a>
-<span class="sourceLineNo">248</span> * remove the specified dead server<a name="line.248"></a>
-<span class="sourceLineNo">249</span> * @param deadServerName the dead server name<a name="line.249"></a>
-<span class="sourceLineNo">250</span> * @return true if this server was removed<a name="line.250"></a>
-<span class="sourceLineNo">251</span> */<a name="line.251"></a>
-<span class="sourceLineNo">252</span><a name="line.252"></a>
-<span class="sourceLineNo">253</span> public synchronized boolean removeDeadServer(final ServerName deadServerName) {<a name="line.253"></a>
-<span class="sourceLineNo">254</span> Preconditions.checkState(!processingServers.contains(deadServerName),<a name="line.254"></a>
-<span class="sourceLineNo">255</span> "Asked to remove server still in processingServers set " + deadServerName +<a name="line.255"></a>
-<span class="sourceLineNo">256</span> " (numProcessing=" + processingServers.size() + ")");<a name="line.256"></a>
-<span class="sourceLineNo">257</span> if (deadServers.remove(deadServerName) == null) {<a name="line.257"></a>
-<span class="sourceLineNo">258</span> return false;<a name="line.258"></a>
-<span class="sourceLineNo">259</span> }<a name="line.259"></a>
-<span class="sourceLineNo">260</span> return true;<a name="line.260"></a>
-<span class="sourceLineNo">261</span> }<a name="line.261"></a>
-<span class="sourceLineNo">262</span>}<a name="line.262"></a>
+<span class="sourceLineNo">041</span>/**<a name="line.41"></a>
+<span class="sourceLineNo">042</span> * Class to hold dead servers list and utility querying dead server list.<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * On znode expiration, servers are added here.<a name="line.43"></a>
+<span class="sourceLineNo">044</span> */<a name="line.44"></a>
+<span class="sourceLineNo">045</span>@InterfaceAudience.Private<a name="line.45"></a>
+<span class="sourceLineNo">046</span>public class DeadServer {<a name="line.46"></a>
+<span class="sourceLineNo">047</span> private static final Logger LOG = LoggerFactory.getLogger(DeadServer.class);<a name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span> /**<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * Set of known dead servers. On znode expiration, servers are added here.<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * This is needed in case of a network partitioning where the server's lease<a name="line.51"></a>
+<span class="sourceLineNo">052</span> * expires, but the server is still running. After the network is healed,<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * and it's server logs are recovered, it will be told to call server startup<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * because by then, its regions have probably been reassigned.<a name="line.54"></a>
+<span class="sourceLineNo">055</span> */<a name="line.55"></a>
+<span class="sourceLineNo">056</span> private final Map<ServerName, Long> deadServers = new HashMap<>();<a name="line.56"></a>
+<span class="sourceLineNo">057</span><a name="line.57"></a>
+<span class="sourceLineNo">058</span> /**<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * Set of dead servers currently being processed<a name="line.59"></a>
+<span class="sourceLineNo">060</span> */<a name="line.60"></a>
+<span class="sourceLineNo">061</span> private final Set<ServerName> processingServers = new HashSet<ServerName>();<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> * A dead server that comes back alive has a different start code. The new start code should be<a name="line.64"></a>
+<span class="sourceLineNo">065</span> * greater than the old one, but we don't take this into account in this method.<a name="line.65"></a>
+<span class="sourceLineNo">066</span> *<a name="line.66"></a>
+<span class="sourceLineNo">067</span> * @param newServerName Servername as either <code>host:port</code> or<a name="line.67"></a>
+<span class="sourceLineNo">068</span> * <code>host,port,startcode</code>.<a name="line.68"></a>
+<span class="sourceLineNo">069</span> * @return true if this server was dead before and coming back alive again<a name="line.69"></a>
+<span class="sourceLineNo">070</span> */<a name="line.70"></a>
+<span class="sourceLineNo">071</span> public synchronized boolean cleanPreviousInstance(final ServerName newServerName) {<a name="line.71"></a>
+<span class="sourceLineNo">072</span> Iterator<ServerName> it = deadServers.keySet().iterator();<a name="line.72"></a>
+<span class="sourceLineNo">073</span> while (it.hasNext()) {<a name="line.73"></a>
+<span class="sourceLineNo">074</span> ServerName sn = it.next();<a name="line.74"></a>
+<span class="sourceLineNo">075</span> if (ServerName.isSameAddress(sn, newServerName)) {<a name="line.75"></a>
+<span class="sourceLineNo">076</span> // remove from deadServers<a name="line.76"></a>
+<span class="sourceLineNo">077</span> it.remove();<a name="line.77"></a>
+<span class="sourceLineNo">078</span> // remove from processingServers<a name="line.78"></a>
+<span class="sourceLineNo">079</span> boolean removed = processingServers.remove(sn);<a name="line.79"></a>
+<span class="sourceLineNo">080</span> if (removed) {<a name="line.80"></a>
+<span class="sourceLineNo">081</span> LOG.debug("Removed " + sn + " ; numProcessing=" + processingServers.size());<a name="line.81"></a>
+<span class="sourceLineNo">082</span> }<a name="line.82"></a>
+<span class="sourceLineNo">083</span> return true;<a name="line.83"></a>
+<span class="sourceLineNo">084</span> }<a name="line.84"></a>
+<span class="sourceLineNo">085</span> }<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> return false;<a name="line.87"></a>
+<span class="sourceLineNo">088</span> }<a name="line.88"></a>
+<span class="sourceLineNo">089</span><a name="line.89"></a>
+<span class="sourceLineNo">090</span> /**<a name="line.90"></a>
+<span class="sourceLineNo">091</span> * @param serverName server name.<a name="line.91"></a>
+<span class="sourceLineNo">092</span> * @return true if this server is on the dead servers list false otherwise<a name="line.92"></a>
+<span class="sourceLineNo">093</span> */<a name="line.93"></a>
+<span class="sourceLineNo">094</span> public synchronized boolean isDeadServer(final ServerName serverName) {<a name="line.94"></a>
+<span class="sourceLineNo">095</span> return deadServers.containsKey(serverName);<a name="line.95"></a>
+<span class="sourceLineNo">096</span> }<a name="line.96"></a>
+<span class="sourceLineNo">097</span><a name="line.97"></a>
+<span class="sourceLineNo">098</span> /**<a name="line.98"></a>
+<span class="sourceLineNo">099</span> * @param serverName server name.<a name="line.99"></a>
+<span class="sourceLineNo">100</span> * @return true if this server is on the processing servers list false otherwise<a name="line.100"></a>
+<span class="sourceLineNo">101</span> */<a name="line.101"></a>
+<span class="sourceLineNo">102</span> public synchronized boolean isProcessingServer(final ServerName serverName) {<a name="line.102"></a>
+<span class="sourceLineNo">103</span> return processingServers.contains(serverName);<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> /**<a name="line.106"></a>
+<span class="sourceLineNo">107</span> * Checks if there are currently any dead servers being processed by the<a name="line.107"></a>
+<span class="sourceLineNo">108</span> * master. Returns true if at least one region server is currently being<a name="line.108"></a>
+<span class="sourceLineNo">109</span> * processed as dead.<a name="line.109"></a>
+<span class="sourceLineNo">110</span> *<a name="line.110"></a>
+<span class="sourceLineNo">111</span> * @return true if any RS are being processed as dead<a name="line.111"></a>
+<span class="sourceLineNo">112</span> */<a name="line.112"></a>
+<span class="sourceLineNo">113</span> public synchronized boolean areDeadServersInProgress() {<a name="line.113"></a>
+<span class="sourceLineNo">114</span> return !processingServers.isEmpty();<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> public synchronized Set<ServerName> copyServerNames() {<a name="line.117"></a>
+<span class="sourceLineNo">118</span> Set<ServerName> clone = new HashSet<>(deadServers.size());<a name="line.118"></a>
+<span class="sourceLineNo">119</span> clone.addAll(deadServers.keySet());<a name="line.119"></a>
+<span class="sourceLineNo">120</span> return clone;<a name="line.120"></a>
+<span class="sourceLineNo">121</span> }<a name="line.121"></a>
+<span class="sourceLineNo">122</span><a name="line.122"></a>
+<span class="sourceLineNo">123</span> /**<a name="line.123"></a>
+<span class="sourceLineNo">124</span> * Adds the server to the dead server list if it's not there already.<a name="line.124"></a>
+<span class="sourceLineNo">125</span> * @param sn the server name<a name="line.125"></a>
+<span class="sourceLineNo">126</span> */<a name="line.126"></a>
+<span class="sourceLineNo">127</span> public synchronized void add(ServerName sn) {<a name="line.127"></a>
+<span class="sourceLineNo">128</span> if (!deadServers.containsKey(sn)){<a name="line.128"></a>
+<span class="sourceLineNo">129</span> deadServers.put(sn, EnvironmentEdgeManager.currentTime());<a name="line.129"></a>
+<span class="sourceLineNo">130</span> }<a name="line.130"></a>
+<span class="sourceLineNo">131</span> boolean added = processingServers.add(sn);<a name="line.131"></a>
+<span class="sourceLineNo">132</span> if (LOG.isDebugEnabled() && added) {<a name="line.132"></a>
+<span class="sourceLineNo">133</span> LOG.debug("Added " + sn + "; numProcessing=" + processingServers.size());<a name="line.133"></a>
+<span class="sourceLineNo">134</span> }<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<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> * Notify that we started processing this dead server.<a name="line.138"></a>
+<span class="sourceLineNo">139</span> * @param sn ServerName for the dead server.<a name="line.139"></a>
+<span class="sourceLineNo">140</span> */<a name="line.140"></a>
+<span class="sourceLineNo">141</span> public synchronized void notifyServer(ServerName sn) {<a name="line.141"></a>
+<span class="sourceLineNo">142</span> boolean added = processingServers.add(sn);<a name="line.142"></a>
+<span class="sourceLineNo">143</span> if (LOG.isDebugEnabled()) {<a name="line.143"></a>
+<span class="sourceLineNo">144</span> if (added) {<a name="line.144"></a>
+<span class="sourceLineNo">145</span> LOG.debug("Added " + sn + "; numProcessing=" + processingServers.size());<a name="line.145"></a>
+<span class="sourceLineNo">146</span> }<a name="line.146"></a>
+<span class="sourceLineNo">147</span> LOG.debug("Started processing " + sn + "; numProcessing=" + processingServers.size());<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> * Complete processing for this dead server.<a name="line.152"></a>
+<span class="sourceLineNo">153</span> * @param sn ServerName for the dead server.<a name="line.153"></a>
+<span class="sourceLineNo">154</span> */<a name="line.154"></a>
+<span class="sourceLineNo">155</span> public synchronized void finish(ServerName sn) {<a name="line.155"></a>
+<span class="sourceLineNo">156</span> boolean removed = processingServers.remove(sn);<a name="line.156"></a>
+<span class="sourceLineNo">157</span> if (LOG.isDebugEnabled()) {<a name="line.157"></a>
+<span class="sourceLineNo">158</span> LOG.debug("Finished processing " + sn + "; numProcessing=" + processingServers.size());<a name="line.158"></a>
+<span class="sourceLineNo">159</span> if (removed) {<a name="line.159"></a>
+<span class="sourceLineNo">160</span> LOG.debug("Removed " + sn + " ; numProcessing=" + processingServers.size());<a name="line.160"></a>
+<span class="sourceLineNo">161</span> }<a name="line.161"></a>
+<span class="sourceLineNo">162</span> }<a name="line.162"></a>
+<span class="sourceLineNo">163</span> }<a name="line.163"></a>
+<span class="sourceLineNo">164</span><a name="line.164"></a>
+<span class="sourceLineNo">165</span> public synchronized int size() {<a name="line.165"></a>
+<span class="sourceLineNo">166</span> return deadServers.size();<a name="line.166"></a>
+<span class="sourceLineNo">167</span> }<a name="line.167"></a>
+<span class="sourceLineNo">168</span><a name="line.168"></a>
+<span class="sourceLineNo">169</span> public synchronized boolean isEmpty() {<a name="line.169"></a>
+<span class="sourceLineNo">170</span> return deadServers.isEmpty();<a name="line.170"></a>
+<span class="sourceLineNo">171</span> }<a name="line.171"></a>
+<span class="sourceLineNo">172</span><a name="line.172"></a>
+<span class="sourceLineNo">173</span> public synchronized void cleanAllPreviousInstances(final ServerName newServerName) {<a name="line.173"></a>
+<span class="sourceLineNo">174</span> Iterator<ServerName> it = deadServers.keySet().iterator();<a name="line.174"></a>
+<span class="sourceLineNo">175</span> while (it.hasNext()) {<a name="line.175"></a>
+<span class="sourceLineNo">176</span> ServerName sn = it.next();<a name="line.176"></a>
+<span class="sourceLineNo">177</span> if (ServerName.isSameAddress(sn, newServerName)) {<a name="line.177"></a>
+<span class="sourceLineNo">178</span> // remove from deadServers<a name="line.178"></a>
+<span class="sourceLineNo">179</span> it.remove();<a name="line.179"></a>
+<span class="sourceLineNo">180</span> // remove from processingServers<a name="line.180"></a>
+<span class="sourceLineNo">181</span> boolean removed = processingServers.remove(sn);<a name="line.181"></a>
+<span class="sourceLineNo">182</span> if (removed) {<a name="line.182"></a>
+<span class="sourceLineNo">183</span> LOG.debug("Removed " + sn + " ; numProcessing=" + processingServers.size());<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><a name="line.188"></a>
+<span class="sourceLineNo">189</span> @Override<a name="line.189"></a>
+<span class="sourceLineNo">190</span> public synchronized String toString() {<a name="line.190"></a>
+<span class="sourceLineNo">191</span> // Display unified set of servers from both maps<a name="line.191"></a>
+<span class="sourceLineNo">192</span> Set<ServerName> servers = new HashSet<ServerName>();<a name="line.192"></a>
+<span class="sourceLineNo">193</span> servers.addAll(deadServers.keySet());<a name="line.193"></a>
+<span class="sourceLineNo">194</span> servers.addAll(processingServers);<a name="line.194"></a>
+<span class="sourceLineNo">195</span> StringBuilder sb = new StringBuilder();<a name="line.195"></a>
+<span class="sourceLineNo">196</span> for (ServerName sn : servers) {<a name="line.196"></a>
+<span class="sourceLineNo">197</span> if (sb.length() > 0) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> sb.append(", ");<a name="line.198"></a>
+<span class="sourceLineNo">199</span> }<a name="line.199"></a>
+<span class="sourceLineNo">200</span> sb.append(sn.toString());<a name="line.200"></a>
+<span class="sourceLineNo">201</span> // Star entries that are being processed<a name="line.201"></a>
+<span class="sourceLineNo">202</span> if (processingServers.contains(sn)) {<a name="line.202"></a>
+<span class="sourceLineNo">203</span> sb.append("*");<a name="line.203"></a>
+<span class="sourceLineNo">204</span> }<a name="line.204"></a>
+<span class="sourceLineNo">205</span> }<a name="line.205"></a>
+<span class="sourceLineNo">206</span> return sb.toString();<a name="line.206"></a>
+<span class="sourceLineNo">207</span> }<a name="line.207"></a>
+<span class="sourceLineNo">208</span><a name="line.208"></a>
+<span class="sourceLineNo">209</span> /**<a name="line.209"></a>
+<span class="sourceLineNo">210</span> * Extract all the servers dead since a given time, and sort them.<a name="line.210"></a>
+<span class="sourceLineNo">211</span> * @param ts the time, 0 for all<a name="line.211"></a>
+<span class="sourceLineNo">212</span> * @return a sorted array list, by death time, lowest values first.<a name="line.212"></a>
+<span class="sourceLineNo">213</span> */<a name="line.213"></a>
+<span class="sourceLineNo">214</span> public synchronized List<Pair<ServerName, Long>> copyDeadServersSince(long ts){<a name="line.214"></a>
+<span class="sourceLineNo">215</span> List<Pair<ServerName, Long>> res = new ArrayList<>(size());<a name="line.215"></a>
+<span class="sourceLineNo">216</span><a name="line.216"></a>
+<span class="sourceLineNo">217</span> for (Map.Entry<ServerName, Long> entry:deadServers.entrySet()){<a name="line.217"></a>
+<span class="sourceLineNo">218</span> if (entry.getValue() >= ts){<a name="line.218"></a>
+<span class="sourceLineNo">219</span> res.add(new Pair<>(entry.getKey(), entry.getValue()));<a name="line.219"></a>
+<span class="sourceLineNo">220</span> }<a name="line.220"></a>
+<span class="sourceLineNo">221</span> }<a name="line.221"></a>
+<span class="sourceLineNo">222</span><a name="line.222"></a>
+<span class="sourceLineNo">223</span> Collections.sort(res, ServerNameDeathDateComparator);<a name="line.223"></a>
+<span class="sourceLineNo">224</span> return res;<a name="line.224"></a>
+<span class="sourceLineNo">225</span> }<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> * Get the time when a server died<a name="line.228"></a>
+<span class="sourceLineNo">229</span> * @param deadServerName the dead server name<a name="line.229"></a>
+<span class="sourceLineNo">230</span> * @return the date when the server died <a name="line.230"></a>
+<span class="sourceLineNo">231</span> */<a name="line.231"></a>
+<span class="sourceLineNo">232</span> public synchronized Date getTimeOfDeath(final ServerName deadServerName){<a name="line.232"></a>
+<span class="sourceLineNo">233</span> Long time = deadServers.get(deadServerName);<a name="line.233"></a>
+<span class="sourceLineNo">234</span> return time == null ? null : new Date(time);<a name="line.234"></a>
+<span class="sourceLineNo">235</span> }<a name="line.235"></a>
+<span class="sourceLineNo">236</span><a name="line.236"></a>
+<span class="sourceLineNo">237</span> private static Comparator<Pair<ServerName, Long>> ServerNameDeathDateComparator =<a name="line.237"></a>
+<span class="sourceLineNo">238</span> new Comparator<Pair<ServerName, Long>>(){<a name="line.238"></a>
+<span class="sourceLineNo">239</span><a name="line.239"></a>
+<span class="sourceLineNo">240</span> @Override<a name="line.240"></a>
+<span class="sourceLineNo">241</span> public int compare(Pair<ServerName, Long> o1, Pair<ServerName, Long> o2) {<a name="line.241"></a>
+<span class="sourceLineNo">242</span> return o1.getSecond().compareTo(o2.getSecond());<a name="line.242"></a>
+<span class="sourceLineNo">243</span> }<a name="line.243"></a>
+<span class="sourceLineNo">244</span> };<a name="line.244"></a>
+<span class="sourceLineNo">245</span><a name="line.245"></a>
+<span class="sourceLineNo">246</span> /**<a name="line.246"></a>
+<span class="sourceLineNo">247</span> * remove the specified dead server<a name="line.247"></a>
+<span class="sourceLineNo">248</span> * @param deadServerName the dead server name<a name="line.248"></a>
+<span class="sourceLineNo">249</span> * @return true if this server was removed<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> public synchronized boolean removeDeadServer(final ServerName deadServerName) {<a name="line.252"></a>
+<span class="sourceLineNo">253</span> Preconditions.checkState(!processingServers.contains(deadServerName),<a name="line.253"></a>
+<span class="sourceLineNo">254</span> "Asked to remove server still in processingServers set " + deadServerName +<a name="line.254"></a>
+<span class="sourceLineNo">255</span> " (numProcessing=" + processingServers.size() + ")");<a name="line.255"></a>
+<span class="sourceLineNo">256</span> if (deadServers.remove(deadServerName) == null) {<a name="line.256"></a>
+<span class="sourceLineNo">257</span> return false;<a name="line.257"></a>
+<span class="sourceLineNo">258</span> }<a name="line.258"></a>
+<span class="sourceLineNo">259</span> return true;<a name="line.259"></a>
+<span class="sourceLineNo">260</span> }<a name="line.260"></a>
+<span class="sourceLineNo">261</span>}<a name="line.261"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/70f4ddbc/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.html
index 09aca29..79b1a78 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.html
@@ -67,82 +67,81 @@
<span class="sourceLineNo">059</span> }<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span> @Override<a name="line.61"></a>
-<span class="sourceLineNo">062</span> protected void resetKVHeap(List<? extends KeyValueScanner> scanners,<a name="line.62"></a>
+<span class="sourceLineNo">062</span> protected KeyValueHeap newKVHeap(List<? extends KeyValueScanner> scanners,<a name="line.62"></a>
<span class="sourceLineNo">063</span> CellComparator comparator) throws IOException {<a name="line.63"></a>
-<span class="sourceLineNo">064</span> // Combine all seeked scanners with a heap<a name="line.64"></a>
-<span class="sourceLineNo">065</span> heap = new ReversedKeyValueHeap(scanners, comparator);<a name="line.65"></a>
-<span class="sourceLineNo">066</span> }<a name="line.66"></a>
-<span class="sourceLineNo">067</span><a name="line.67"></a>
-<span class="sourceLineNo">068</span> @Override<a name="line.68"></a>
-<span class="sourceLineNo">069</span> protected void seekScanners(List<? extends KeyValueScanner> scanners,<a name="line.69"></a>
-<span class="sourceLineNo">070</span> Cell seekKey, boolean isLazy, boolean isParallelSeek)<a name="line.70"></a>
-<span class="sourceLineNo">071</span> throws IOException {<a name="line.71"></a>
-<span class="sourceLineNo">072</span> // Seek all scanners to the start of the Row (or if the exact matching row<a name="line.72"></a>
-<span class="sourceLineNo">073</span> // key does not exist, then to the start of the previous matching Row).<a name="line.73"></a>
-<span class="sourceLineNo">074</span> if (CellUtil.matchingRows(seekKey, HConstants.EMPTY_START_ROW)) {<a name="line.74"></a>
-<span class="sourceLineNo">075</span> for (KeyValueScanner scanner : scanners) {<a name="line.75"></a>
-<span class="sourceLineNo">076</span> scanner.seekToLastRow();<a name="line.76"></a>
-<span class="sourceLineNo">077</span> }<a name="line.77"></a>
-<span class="sourceLineNo">078</span> } else {<a name="line.78"></a>
-<span class="sourceLineNo">079</span> for (KeyValueScanner scanner : scanners) {<a name="line.79"></a>
-<span class="sourceLineNo">080</span> scanner.backwardSeek(seekKey);<a name="line.80"></a>
-<span class="sourceLineNo">081</span> }<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><a name="line.84"></a>
-<span class="sourceLineNo">085</span> @Override<a name="line.85"></a>
-<span class="sourceLineNo">086</span> protected boolean seekToNextRow(Cell kv) throws IOException {<a name="line.86"></a>
-<span class="sourceLineNo">087</span> return seekToPreviousRow(kv);<a name="line.87"></a>
-<span class="sourceLineNo">088</span> }<a name="line.88"></a>
-<span class="sourceLineNo">089</span><a name="line.89"></a>
-<span class="sourceLineNo">090</span> /**<a name="line.90"></a>
-<span class="sourceLineNo">091</span> * Do a backwardSeek in a reversed StoreScanner(scan backward)<a name="line.91"></a>
-<span class="sourceLineNo">092</span> */<a name="line.92"></a>
-<span class="sourceLineNo">093</span> @Override<a name="line.93"></a>
-<span class="sourceLineNo">094</span> protected boolean seekAsDirection(Cell kv) throws IOException {<a name="line.94"></a>
-<span class="sourceLineNo">095</span> return backwardSeek(kv);<a name="line.95"></a>
-<span class="sourceLineNo">096</span> }<a name="line.96"></a>
-<span class="sourceLineNo">097</span><a name="line.97"></a>
-<span class="sourceLineNo">098</span> @Override<a name="line.98"></a>
-<span class="sourceLineNo">099</span> protected void checkScanOrder(Cell prevKV, Cell kv,<a name="line.99"></a>
-<span class="sourceLineNo">100</span> CellComparator comparator) throws IOException {<a name="line.100"></a>
-<span class="sourceLineNo">101</span> // Check that the heap gives us KVs in an increasing order for same row and<a name="line.101"></a>
-<span class="sourceLineNo">102</span> // decreasing order for different rows.<a name="line.102"></a>
-<span class="sourceLineNo">103</span> assert prevKV == null || comparator == null || comparator.compareRows(kv, prevKV) < 0<a name="line.103"></a>
-<span class="sourceLineNo">104</span> || (CellUtil.matchingRows(kv, prevKV) && comparator.compare(kv,<a name="line.104"></a>
-<span class="sourceLineNo">105</span> prevKV) >= 0) : "Key " + prevKV<a name="line.105"></a>
-<span class="sourceLineNo">106</span> + " followed by a " + "error order key " + kv + " in cf " + store<a name="line.106"></a>
-<span class="sourceLineNo">107</span> + " in reversed scan";<a name="line.107"></a>
-<span class="sourceLineNo">108</span> }<a name="line.108"></a>
-<span class="sourceLineNo">109</span><a name="line.109"></a>
-<span class="sourceLineNo">110</span> @Override<a name="line.110"></a>
-<span class="sourceLineNo">111</span> public boolean reseek(Cell kv) throws IOException {<a name="line.111"></a>
-<span class="sourceLineNo">112</span> throw new IllegalStateException(<a name="line.112"></a>
-<span class="sourceLineNo">113</span> "reseek cannot be called on ReversedStoreScanner");<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> @Override<a name="line.116"></a>
-<span class="sourceLineNo">117</span> public boolean seek(Cell key) throws IOException {<a name="line.117"></a>
-<span class="sourceLineNo">118</span> throw new IllegalStateException(<a name="line.118"></a>
-<span class="sourceLineNo">119</span> "seek cannot be called on ReversedStoreScanner");<a name="line.119"></a>
-<span class="sourceLineNo">120</span> }<a name="line.120"></a>
-<span class="sourceLineNo">121</span><a name="line.121"></a>
-<span class="sourceLineNo">122</span> @Override<a name="line.122"></a>
-<span class="sourceLineNo">123</span> public boolean seekToPreviousRow(Cell key) throws IOException {<a name="line.123"></a>
-<span class="sourceLineNo">124</span> if (checkFlushed()) {<a name="line.124"></a>
-<span class="sourceLineNo">125</span> reopenAfterFlush();<a name="line.125"></a>
-<span class="sourceLineNo">126</span> }<a name="line.126"></a>
-<span class="sourceLineNo">127</span> return this.heap.seekToPreviousRow(key);<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> @Override<a name="line.130"></a>
-<span class="sourceLineNo">131</span> public boolean backwardSeek(Cell key) throws IOException {<a name="line.131"></a>
-<span class="sourceLineNo">132</span> if (checkFlushed()) {<a name="line.132"></a>
-<span class="sourceLineNo">133</span> reopenAfterFlush();<a name="line.133"></a>
-<span class="sourceLineNo">134</span> }<a name="line.134"></a>
-<span class="sourceLineNo">135</span> return this.heap.backwardSeek(key);<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">064</span> return new ReversedKeyValueHeap(scanners, comparator);<a name="line.64"></a>
+<span class="sourceLineNo">065</span> }<a name="line.65"></a>
+<span class="sourceLineNo">066</span><a name="line.66"></a>
+<span class="sourceLineNo">067</span> @Override<a name="line.67"></a>
+<span class="sourceLineNo">068</span> protected void seekScanners(List<? extends KeyValueScanner> scanners,<a name="line.68"></a>
+<span class="sourceLineNo">069</span> Cell seekKey, boolean isLazy, boolean isParallelSeek)<a name="line.69"></a>
+<span class="sourceLineNo">070</span> throws IOException {<a name="line.70"></a>
+<span class="sourceLineNo">071</span> // Seek all scanners to the start of the Row (or if the exact matching row<a name="line.71"></a>
+<span class="sourceLineNo">072</span> // key does not exist, then to the start of the previous matching Row).<a name="line.72"></a>
+<span class="sourceLineNo">073</span> if (CellUtil.matchingRows(seekKey, HConstants.EMPTY_START_ROW)) {<a name="line.73"></a>
+<span class="sourceLineNo">074</span> for (KeyValueScanner scanner : scanners) {<a name="line.74"></a>
+<span class="sourceLineNo">075</span> scanner.seekToLastRow();<a name="line.75"></a>
+<span class="sourceLineNo">076</span> }<a name="line.76"></a>
+<span class="sourceLineNo">077</span> } else {<a name="line.77"></a>
+<span class="sourceLineNo">078</span> for (KeyValueScanner scanner : scanners) {<a name="line.78"></a>
+<span class="sourceLineNo">079</span> scanner.backwardSeek(seekKey);<a name="line.79"></a>
+<span class="sourceLineNo">080</span> }<a name="line.80"></a>
+<span class="sourceLineNo">081</span> }<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> @Override<a name="line.84"></a>
+<span class="sourceLineNo">085</span> protected boolean seekToNextRow(Cell kv) throws IOException {<a name="line.85"></a>
+<span class="sourceLineNo">086</span> return seekToPreviousRow(kv);<a name="line.86"></a>
+<span class="sourceLineNo">087</span> }<a name="line.87"></a>
+<span class="sourceLineNo">088</span><a name="line.88"></a>
+<span class="sourceLineNo">089</span> /**<a name="line.89"></a>
+<span class="sourceLineNo">090</span> * Do a backwardSeek in a reversed StoreScanner(scan backward)<a name="line.90"></a>
+<span class="sourceLineNo">091</span> */<a name="line.91"></a>
+<span class="sourceLineNo">092</span> @Override<a name="line.92"></a>
+<span class="sourceLineNo">093</span> protected boolean seekAsDirection(Cell kv) throws IOException {<a name="line.93"></a>
+<span class="sourceLineNo">094</span> return backwardSeek(kv);<a name="line.94"></a>
+<span class="sourceLineNo">095</span> }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span> @Override<a name="line.97"></a>
+<span class="sourceLineNo">098</span> protected void checkScanOrder(Cell prevKV, Cell kv,<a name="line.98"></a>
+<span class="sourceLineNo">099</span> CellComparator comparator) throws IOException {<a name="line.99"></a>
+<span class="sourceLineNo">100</span> // Check that the heap gives us KVs in an increasing order for same row and<a name="line.100"></a>
+<span class="sourceLineNo">101</span> // decreasing order for different rows.<a name="line.101"></a>
+<span class="sourceLineNo">102</span> assert prevKV == null || comparator == null || comparator.compareRows(kv, prevKV) < 0<a name="line.102"></a>
+<span class="sourceLineNo">103</span> || (CellUtil.matchingRows(kv, prevKV) && comparator.compare(kv,<a name="line.103"></a>
+<span class="sourceLineNo">104</span> prevKV) >= 0) : "Key " + prevKV<a name="line.104"></a>
+<span class="sourceLineNo">105</span> + " followed by a " + "error order key " + kv + " in cf " + store<a name="line.105"></a>
+<span class="sourceLineNo">106</span> + " in reversed scan";<a name="line.106"></a>
+<span class="sourceLineNo">107</span> }<a name="line.107"></a>
+<span class="sourceLineNo">108</span><a name="line.108"></a>
+<span class="sourceLineNo">109</span> @Override<a name="line.109"></a>
+<span class="sourceLineNo">110</span> public boolean reseek(Cell kv) throws IOException {<a name="line.110"></a>
+<span class="sourceLineNo">111</span> throw new IllegalStateException(<a name="line.111"></a>
+<span class="sourceLineNo">112</span> "reseek cannot be called on ReversedStoreScanner");<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> @Override<a name="line.115"></a>
+<span class="sourceLineNo">116</span> public boolean seek(Cell key) throws IOException {<a name="line.116"></a>
+<span class="sourceLineNo">117</span> throw new IllegalStateException(<a name="line.117"></a>
+<span class="sourceLineNo">118</span> "seek cannot be called on ReversedStoreScanner");<a name="line.118"></a>
+<span class="sourceLineNo">119</span> }<a name="line.119"></a>
+<span class="sourceLineNo">120</span><a name="line.120"></a>
+<span class="sourceLineNo">121</span> @Override<a name="line.121"></a>
+<span class="sourceLineNo">122</span> public boolean seekToPreviousRow(Cell key) throws IOException {<a name="line.122"></a>
+<span class="sourceLineNo">123</span> if (checkFlushed()) {<a name="line.123"></a>
+<span class="sourceLineNo">124</span> reopenAfterFlush();<a name="line.124"></a>
+<span class="sourceLineNo">125</span> }<a name="line.125"></a>
+<span class="sourceLineNo">126</span> return this.heap.seekToPreviousRow(key);<a name="line.126"></a>
+<span class="sourceLineNo">127</span> }<a name="line.127"></a>
+<span class="sourceLineNo">128</span><a name="line.128"></a>
+<span class="sourceLineNo">129</span> @Override<a name="line.129"></a>
+<span class="sourceLineNo">130</span> public boolean backwardSeek(Cell key) throws IOException {<a name="line.130"></a>
+<span class="sourceLineNo">131</span> if (checkFlushed()) {<a name="line.131"></a>
+<span class="sourceLineNo">132</span> reopenAfterFlush();<a name="line.132"></a>
+<span class="sourceLineNo">133</span> }<a name="line.133"></a>
+<span class="sourceLineNo">134</span> return this.heap.backwardSeek(key);<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<a name="line.135"></a>
+<span class="sourceLineNo">136</span>}<a name="line.136"></a>