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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/04/05 14:47:18 UTC
[11/40] hbase-site git commit: Published site at
e2b0490d18f7cc03aa59475a1b423597ddc481fb.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/6c67ddd7/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html b/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html
index 4a4853f..c90e6fa 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html
@@ -26,18 +26,18 @@
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.replication;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import static java.util.stream.Collectors.toList;<a name="line.20"></a>
-<span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.util.CollectionUtils.nullToEmpty;<a name="line.21"></a>
-<span class="sourceLineNo">022</span><a name="line.22"></a>
-<span class="sourceLineNo">023</span>import java.util.ArrayList;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import java.util.Collections;<a name="line.24"></a>
-<span class="sourceLineNo">025</span>import java.util.HashSet;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import java.util.List;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import java.util.Map;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import java.util.Map.Entry;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import java.util.Set;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import java.util.SortedSet;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import java.util.TreeSet;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import java.util.stream.Collectors;<a name="line.32"></a>
+<span class="sourceLineNo">021</span><a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.util.Collections;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.HashSet;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.List;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.Map;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import java.util.Map.Entry;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import java.util.Set;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import java.util.SortedSet;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import java.util.TreeSet;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import java.util.stream.Collectors;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.commons.collections.CollectionUtils;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.conf.Configuration;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.fs.Path;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.HConstants;<a name="line.35"></a>
@@ -45,636 +45,644 @@
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.exceptions.DeserializationException;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.util.CollectionUtils;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil.ZKUtilOp;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.zookeeper.ZKWatcher;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.zookeeper.ZNodePaths;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.zookeeper.KeeperException;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.zookeeper.KeeperException.BadVersionException;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.zookeeper.KeeperException.NoNodeException;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.zookeeper.KeeperException.NodeExistsException;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.zookeeper.KeeperException.NotEmptyException;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.zookeeper.data.Stat;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.slf4j.Logger;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.slf4j.LoggerFactory;<a name="line.54"></a>
-<span class="sourceLineNo">055</span><a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<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> * ZK based replication queue storage.<a name="line.59"></a>
-<span class="sourceLineNo">060</span> * <p><a name="line.60"></a>
-<span class="sourceLineNo">061</span> * The base znode for each regionserver is the regionserver name. For example:<a name="line.61"></a>
-<span class="sourceLineNo">062</span> *<a name="line.62"></a>
-<span class="sourceLineNo">063</span> * <pre><a name="line.63"></a>
-<span class="sourceLineNo">064</span> * /hbase/replication/rs/hostname.example.org,6020,1234<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * </pre><a name="line.65"></a>
-<span class="sourceLineNo">066</span> *<a name="line.66"></a>
-<span class="sourceLineNo">067</span> * Within this znode, the region server maintains a set of WAL replication queues. These queues are<a name="line.67"></a>
-<span class="sourceLineNo">068</span> * represented by child znodes named using there give queue id. For example:<a name="line.68"></a>
-<span class="sourceLineNo">069</span> *<a name="line.69"></a>
-<span class="sourceLineNo">070</span> * <pre><a name="line.70"></a>
-<span class="sourceLineNo">071</span> * /hbase/replication/rs/hostname.example.org,6020,1234/1<a name="line.71"></a>
-<span class="sourceLineNo">072</span> * /hbase/replication/rs/hostname.example.org,6020,1234/2<a name="line.72"></a>
-<span class="sourceLineNo">073</span> * </pre><a name="line.73"></a>
-<span class="sourceLineNo">074</span> *<a name="line.74"></a>
-<span class="sourceLineNo">075</span> * Each queue has one child znode for every WAL that still needs to be replicated. The value of<a name="line.75"></a>
-<span class="sourceLineNo">076</span> * these WAL child znodes is the latest position that has been replicated. This position is updated<a name="line.76"></a>
-<span class="sourceLineNo">077</span> * every time a WAL entry is replicated. For example:<a name="line.77"></a>
-<span class="sourceLineNo">078</span> *<a name="line.78"></a>
-<span class="sourceLineNo">079</span> * <pre><a name="line.79"></a>
-<span class="sourceLineNo">080</span> * /hbase/replication/rs/hostname.example.org,6020,1234/1/23522342.23422 [VALUE: 254]<a name="line.80"></a>
-<span class="sourceLineNo">081</span> * </pre><a name="line.81"></a>
-<span class="sourceLineNo">082</span> */<a name="line.82"></a>
-<span class="sourceLineNo">083</span>@InterfaceAudience.Private<a name="line.83"></a>
-<span class="sourceLineNo">084</span>class ZKReplicationQueueStorage extends ZKReplicationStorageBase<a name="line.84"></a>
-<span class="sourceLineNo">085</span> implements ReplicationQueueStorage {<a name="line.85"></a>
-<span class="sourceLineNo">086</span><a name="line.86"></a>
-<span class="sourceLineNo">087</span> private static final Logger LOG = LoggerFactory.getLogger(ZKReplicationQueueStorage.class);<a name="line.87"></a>
-<span class="sourceLineNo">088</span><a name="line.88"></a>
-<span class="sourceLineNo">089</span> public static final String ZOOKEEPER_ZNODE_REPLICATION_HFILE_REFS_KEY =<a name="line.89"></a>
-<span class="sourceLineNo">090</span> "zookeeper.znode.replication.hfile.refs";<a name="line.90"></a>
-<span class="sourceLineNo">091</span> public static final String ZOOKEEPER_ZNODE_REPLICATION_HFILE_REFS_DEFAULT = "hfile-refs";<a name="line.91"></a>
-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span> public static final String ZOOKEEPER_ZNODE_REPLICATION_REGIONS_KEY =<a name="line.93"></a>
-<span class="sourceLineNo">094</span> "zookeeper.znode.replication.regions";<a name="line.94"></a>
-<span class="sourceLineNo">095</span> public static final String ZOOKEEPER_ZNODE_REPLICATION_REGIONS_DEFAULT = "regions";<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> * The name of the znode that contains all replication queues<a name="line.98"></a>
-<span class="sourceLineNo">099</span> */<a name="line.99"></a>
-<span class="sourceLineNo">100</span> private final String queuesZNode;<a name="line.100"></a>
-<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span> /**<a name="line.102"></a>
-<span class="sourceLineNo">103</span> * The name of the znode that contains queues of hfile references to be replicated<a name="line.103"></a>
-<span class="sourceLineNo">104</span> */<a name="line.104"></a>
-<span class="sourceLineNo">105</span> private final String hfileRefsZNode;<a name="line.105"></a>
-<span class="sourceLineNo">106</span><a name="line.106"></a>
-<span class="sourceLineNo">107</span> @VisibleForTesting<a name="line.107"></a>
-<span class="sourceLineNo">108</span> final String regionsZNode;<a name="line.108"></a>
-<span class="sourceLineNo">109</span><a name="line.109"></a>
-<span class="sourceLineNo">110</span> public ZKReplicationQueueStorage(ZKWatcher zookeeper, Configuration conf) {<a name="line.110"></a>
-<span class="sourceLineNo">111</span> super(zookeeper, conf);<a name="line.111"></a>
-<span class="sourceLineNo">112</span><a name="line.112"></a>
-<span class="sourceLineNo">113</span> String queuesZNodeName = conf.get("zookeeper.znode.replication.rs", "rs");<a name="line.113"></a>
-<span class="sourceLineNo">114</span> String hfileRefsZNodeName = conf.get(ZOOKEEPER_ZNODE_REPLICATION_HFILE_REFS_KEY,<a name="line.114"></a>
-<span class="sourceLineNo">115</span> ZOOKEEPER_ZNODE_REPLICATION_HFILE_REFS_DEFAULT);<a name="line.115"></a>
-<span class="sourceLineNo">116</span> this.queuesZNode = ZNodePaths.joinZNode(replicationZNode, queuesZNodeName);<a name="line.116"></a>
-<span class="sourceLineNo">117</span> this.hfileRefsZNode = ZNodePaths.joinZNode(replicationZNode, hfileRefsZNodeName);<a name="line.117"></a>
-<span class="sourceLineNo">118</span> this.regionsZNode = ZNodePaths.joinZNode(replicationZNode, conf<a name="line.118"></a>
-<span class="sourceLineNo">119</span> .get(ZOOKEEPER_ZNODE_REPLICATION_REGIONS_KEY, ZOOKEEPER_ZNODE_REPLICATION_REGIONS_DEFAULT));<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> private String getRsNode(ServerName serverName) {<a name="line.122"></a>
-<span class="sourceLineNo">123</span> return ZNodePaths.joinZNode(queuesZNode, serverName.getServerName());<a name="line.123"></a>
-<span class="sourceLineNo">124</span> }<a name="line.124"></a>
-<span class="sourceLineNo">125</span><a name="line.125"></a>
-<span class="sourceLineNo">126</span> private String getQueueNode(ServerName serverName, String queueId) {<a name="line.126"></a>
-<span class="sourceLineNo">127</span> return ZNodePaths.joinZNode(getRsNode(serverName), queueId);<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> private String getFileNode(String queueNode, String fileName) {<a name="line.130"></a>
-<span class="sourceLineNo">131</span> return ZNodePaths.joinZNode(queueNode, fileName);<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> private String getFileNode(ServerName serverName, String queueId, String fileName) {<a name="line.134"></a>
-<span class="sourceLineNo">135</span> return getFileNode(getQueueNode(serverName, queueId), fileName);<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> * <p><a name="line.139"></a>
-<span class="sourceLineNo">140</span> * Put all regions under /hbase/replication/regions znode will lead to too many children because<a name="line.140"></a>
-<span class="sourceLineNo">141</span> * of the huge number of regions in real production environment. So here we will distribute the<a name="line.141"></a>
-<span class="sourceLineNo">142</span> * znodes to multiple directories.<a name="line.142"></a>
-<span class="sourceLineNo">143</span> * </p><a name="line.143"></a>
-<span class="sourceLineNo">144</span> * <p><a name="line.144"></a>
-<span class="sourceLineNo">145</span> * So the final znode path will be format like this:<a name="line.145"></a>
-<span class="sourceLineNo">146</span> *<a name="line.146"></a>
-<span class="sourceLineNo">147</span> * <pre><a name="line.147"></a>
-<span class="sourceLineNo">148</span> * /hbase/replication/regions/dd/04/e76a6966d4ffa908ed0586764767-100<a name="line.148"></a>
-<span class="sourceLineNo">149</span> * </pre><a name="line.149"></a>
-<span class="sourceLineNo">150</span> *<a name="line.150"></a>
-<span class="sourceLineNo">151</span> * Here the full encoded region name is dd04e76a6966d4ffa908ed0586764767, and we use the first two<a name="line.151"></a>
-<span class="sourceLineNo">152</span> * characters 'dd' as the first level directory name, and use the next two characters '04' as the<a name="line.152"></a>
-<span class="sourceLineNo">153</span> * second level directory name, and the rest part as the prefix of the znode, and the suffix '100'<a name="line.153"></a>
-<span class="sourceLineNo">154</span> * is the peer id.<a name="line.154"></a>
-<span class="sourceLineNo">155</span> * </p><a name="line.155"></a>
-<span class="sourceLineNo">156</span> * @param encodedRegionName the encoded region name.<a name="line.156"></a>
-<span class="sourceLineNo">157</span> * @param peerId peer id for replication.<a name="line.157"></a>
-<span class="sourceLineNo">158</span> * @return ZNode path to persist the max sequence id that we've pushed for the given region and<a name="line.158"></a>
-<span class="sourceLineNo">159</span> * peer.<a name="line.159"></a>
-<span class="sourceLineNo">160</span> */<a name="line.160"></a>
-<span class="sourceLineNo">161</span> @VisibleForTesting<a name="line.161"></a>
-<span class="sourceLineNo">162</span> String getSerialReplicationRegionPeerNode(String encodedRegionName, String peerId) {<a name="line.162"></a>
-<span class="sourceLineNo">163</span> if (encodedRegionName == null || encodedRegionName.length() != RegionInfo.MD5_HEX_LENGTH) {<a name="line.163"></a>
-<span class="sourceLineNo">164</span> throw new IllegalArgumentException(<a name="line.164"></a>
-<span class="sourceLineNo">165</span> "Invalid encoded region name: " + encodedRegionName + ", length should be 32.");<a name="line.165"></a>
-<span class="sourceLineNo">166</span> }<a name="line.166"></a>
-<span class="sourceLineNo">167</span> return new StringBuilder(regionsZNode).append(ZNodePaths.ZNODE_PATH_SEPARATOR)<a name="line.167"></a>
-<span class="sourceLineNo">168</span> .append(encodedRegionName.substring(0, 2)).append(ZNodePaths.ZNODE_PATH_SEPARATOR)<a name="line.168"></a>
-<span class="sourceLineNo">169</span> .append(encodedRegionName.substring(2, 4)).append(ZNodePaths.ZNODE_PATH_SEPARATOR)<a name="line.169"></a>
-<span class="sourceLineNo">170</span> .append(encodedRegionName.substring(4)).append("-").append(peerId).toString();<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> @Override<a name="line.173"></a>
-<span class="sourceLineNo">174</span> public void removeQueue(ServerName serverName, String queueId) throws ReplicationException {<a name="line.174"></a>
-<span class="sourceLineNo">175</span> try {<a name="line.175"></a>
-<span class="sourceLineNo">176</span> ZKUtil.deleteNodeRecursively(zookeeper, getQueueNode(serverName, queueId));<a name="line.176"></a>
-<span class="sourceLineNo">177</span> } catch (KeeperException e) {<a name="line.177"></a>
-<span class="sourceLineNo">178</span> throw new ReplicationException(<a name="line.178"></a>
-<span class="sourceLineNo">179</span> "Failed to delete queue (serverName=" + serverName + ", queueId=" + queueId + ")", e);<a name="line.179"></a>
-<span class="sourceLineNo">180</span> }<a name="line.180"></a>
-<span class="sourceLineNo">181</span> }<a name="line.181"></a>
-<span class="sourceLineNo">182</span><a name="line.182"></a>
-<span class="sourceLineNo">183</span> @Override<a name="line.183"></a>
-<span class="sourceLineNo">184</span> public void addWAL(ServerName serverName, String queueId, String fileName)<a name="line.184"></a>
-<span class="sourceLineNo">185</span> throws ReplicationException {<a name="line.185"></a>
-<span class="sourceLineNo">186</span> try {<a name="line.186"></a>
-<span class="sourceLineNo">187</span> ZKUtil.createWithParents(zookeeper, getFileNode(serverName, queueId, fileName));<a name="line.187"></a>
-<span class="sourceLineNo">188</span> } catch (KeeperException e) {<a name="line.188"></a>
-<span class="sourceLineNo">189</span> throw new ReplicationException("Failed to add wal to queue (serverName=" + serverName<a name="line.189"></a>
-<span class="sourceLineNo">190</span> + ", queueId=" + queueId + ", fileName=" + fileName + ")", e);<a name="line.190"></a>
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-<span class="sourceLineNo">193</span><a name="line.193"></a>
-<span class="sourceLineNo">194</span> @Override<a name="line.194"></a>
-<span class="sourceLineNo">195</span> public void removeWAL(ServerName serverName, String queueId, String fileName)<a name="line.195"></a>
-<span class="sourceLineNo">196</span> throws ReplicationException {<a name="line.196"></a>
-<span class="sourceLineNo">197</span> String fileNode = getFileNode(serverName, queueId, fileName);<a name="line.197"></a>
-<span class="sourceLineNo">198</span> try {<a name="line.198"></a>
-<span class="sourceLineNo">199</span> ZKUtil.deleteNode(zookeeper, fileNode);<a name="line.199"></a>
-<span class="sourceLineNo">200</span> } catch (NoNodeException e) {<a name="line.200"></a>
-<span class="sourceLineNo">201</span> LOG.warn("{} already deleted when removing log", fileNode);<a name="line.201"></a>
-<span class="sourceLineNo">202</span> } catch (KeeperException e) {<a name="line.202"></a>
-<span class="sourceLineNo">203</span> throw new ReplicationException("Failed to remove wal from queue (serverName=" + serverName +<a name="line.203"></a>
-<span class="sourceLineNo">204</span> ", queueId=" + queueId + ", fileName=" + fileName + ")", e);<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><a name="line.207"></a>
-<span class="sourceLineNo">208</span> private void addLastSeqIdsToOps(String queueId, Map<String, Long> lastSeqIds,<a name="line.208"></a>
-<span class="sourceLineNo">209</span> List<ZKUtilOp> listOfOps) throws KeeperException, ReplicationException {<a name="line.209"></a>
-<span class="sourceLineNo">210</span> String peerId = new ReplicationQueueInfo(queueId).getPeerId();<a name="line.210"></a>
-<span class="sourceLineNo">211</span> for (Entry<String, Long> lastSeqEntry : lastSeqIds.entrySet()) {<a name="line.211"></a>
-<span class="sourceLineNo">212</span> String path = getSerialReplicationRegionPeerNode(lastSeqEntry.getKey(), peerId);<a name="line.212"></a>
-<span class="sourceLineNo">213</span> Pair<Long, Integer> p = getLastSequenceIdWithVersion(lastSeqEntry.getKey(), peerId);<a name="line.213"></a>
-<span class="sourceLineNo">214</span> byte[] data = ZKUtil.positionToByteArray(lastSeqEntry.getValue());<a name="line.214"></a>
-<span class="sourceLineNo">215</span> if (p.getSecond() < 0) { // ZNode does not exist.<a name="line.215"></a>
-<span class="sourceLineNo">216</span> ZKUtil.createWithParents(zookeeper,<a name="line.216"></a>
-<span class="sourceLineNo">217</span> path.substring(0, path.lastIndexOf(ZNodePaths.ZNODE_PATH_SEPARATOR)));<a name="line.217"></a>
-<span class="sourceLineNo">218</span> listOfOps.add(ZKUtilOp.createAndFailSilent(path, data));<a name="line.218"></a>
-<span class="sourceLineNo">219</span> continue;<a name="line.219"></a>
-<span class="sourceLineNo">220</span> }<a name="line.220"></a>
-<span class="sourceLineNo">221</span> // Perform CAS in a specific version v0 (HBASE-20138)<a name="line.221"></a>
-<span class="sourceLineNo">222</span> int v0 = p.getSecond();<a name="line.222"></a>
-<span class="sourceLineNo">223</span> long lastPushedSeqId = p.getFirst();<a name="line.223"></a>
-<span class="sourceLineNo">224</span> if (lastSeqEntry.getValue() <= lastPushedSeqId) {<a name="line.224"></a>
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-<span class="sourceLineNo">461</span> return getListOfReplicators0();<a name="line.461"></a>
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-<span class="sourceLineNo">469</span> return nullToEmpty(ZKUtil.listChildrenNoWatch(zookeeper, getQueueNode(serverName, queueId)));<a name="line.469"></a>
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-<span class="sourceLineNo">476</span> return getWALsInQueue0(serverName, queueId);<a name="line.476"></a>
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-<span class="sourceLineNo">485</span> return nullToEmpty(ZKUtil.listChildrenNoWatch(zookeeper, getRsNode(serverName)));<a name="line.485"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil.ZKUtilOp;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.zookeeper.ZKWatcher;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.zookeeper.ZNodePaths;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.zookeeper.KeeperException;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.zookeeper.KeeperException.BadVersionException;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.zookeeper.KeeperException.NoNodeException;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.zookeeper.KeeperException.NodeExistsException;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.zookeeper.KeeperException.NotEmptyException;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.zookeeper.data.Stat;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.slf4j.Logger;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.slf4j.LoggerFactory;<a name="line.53"></a>
+<span class="sourceLineNo">054</span><a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>/**<a name="line.57"></a>
+<span class="sourceLineNo">058</span> * ZK based replication queue storage.<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * <p><a name="line.59"></a>
+<span class="sourceLineNo">060</span> * The base znode for each regionserver is the regionserver name. For example:<a name="line.60"></a>
+<span class="sourceLineNo">061</span> *<a name="line.61"></a>
+<span class="sourceLineNo">062</span> * <pre><a name="line.62"></a>
+<span class="sourceLineNo">063</span> * /hbase/replication/rs/hostname.example.org,6020,1234<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * </pre><a name="line.64"></a>
+<span class="sourceLineNo">065</span> *<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * Within this znode, the region server maintains a set of WAL replication queues. These queues are<a name="line.66"></a>
+<span class="sourceLineNo">067</span> * represented by child znodes named using there give queue id. For example:<a name="line.67"></a>
+<span class="sourceLineNo">068</span> *<a name="line.68"></a>
+<span class="sourceLineNo">069</span> * <pre><a name="line.69"></a>
+<span class="sourceLineNo">070</span> * /hbase/replication/rs/hostname.example.org,6020,1234/1<a name="line.70"></a>
+<span class="sourceLineNo">071</span> * /hbase/replication/rs/hostname.example.org,6020,1234/2<a name="line.71"></a>
+<span class="sourceLineNo">072</span> * </pre><a name="line.72"></a>
+<span class="sourceLineNo">073</span> *<a name="line.73"></a>
+<span class="sourceLineNo">074</span> * Each queue has one child znode for every WAL that still needs to be replicated. The value of<a name="line.74"></a>
+<span class="sourceLineNo">075</span> * these WAL child znodes is the latest position that has been replicated. This position is updated<a name="line.75"></a>
+<span class="sourceLineNo">076</span> * every time a WAL entry is replicated. For example:<a name="line.76"></a>
+<span class="sourceLineNo">077</span> *<a name="line.77"></a>
+<span class="sourceLineNo">078</span> * <pre><a name="line.78"></a>
+<span class="sourceLineNo">079</span> * /hbase/replication/rs/hostname.example.org,6020,1234/1/23522342.23422 [VALUE: 254]<a name="line.79"></a>
+<span class="sourceLineNo">080</span> * </pre><a name="line.80"></a>
+<span class="sourceLineNo">081</span> */<a name="line.81"></a>
+<span class="sourceLineNo">082</span>@InterfaceAudience.Private<a name="line.82"></a>
+<span class="sourceLineNo">083</span>class ZKReplicationQueueStorage extends ZKReplicationStorageBase<a name="line.83"></a>
+<span class="sourceLineNo">084</span> implements ReplicationQueueStorage {<a name="line.84"></a>
+<span class="sourceLineNo">085</span><a name="line.85"></a>
+<span class="sourceLineNo">086</span> private static final Logger LOG = LoggerFactory.getLogger(ZKReplicationQueueStorage.class);<a name="line.86"></a>
+<span class="sourceLineNo">087</span><a name="line.87"></a>
+<span class="sourceLineNo">088</span> public static final String ZOOKEEPER_ZNODE_REPLICATION_HFILE_REFS_KEY =<a name="line.88"></a>
+<span class="sourceLineNo">089</span> "zookeeper.znode.replication.hfile.refs";<a name="line.89"></a>
+<span class="sourceLineNo">090</span> public static final String ZOOKEEPER_ZNODE_REPLICATION_HFILE_REFS_DEFAULT = "hfile-refs";<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span> public static final String ZOOKEEPER_ZNODE_REPLICATION_REGIONS_KEY =<a name="line.92"></a>
+<span class="sourceLineNo">093</span> "zookeeper.znode.replication.regions";<a name="line.93"></a>
+<span class="sourceLineNo">094</span> public static final String ZOOKEEPER_ZNODE_REPLICATION_REGIONS_DEFAULT = "regions";<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> * The name of the znode that contains all replication queues<a name="line.97"></a>
+<span class="sourceLineNo">098</span> */<a name="line.98"></a>
+<span class="sourceLineNo">099</span> private final String queuesZNode;<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> * The name of the znode that contains queues of hfile references to be replicated<a name="line.102"></a>
+<span class="sourceLineNo">103</span> */<a name="line.103"></a>
+<span class="sourceLineNo">104</span> private final String hfileRefsZNode;<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span> @VisibleForTesting<a name="line.106"></a>
+<span class="sourceLineNo">107</span> final String regionsZNode;<a name="line.107"></a>
+<span class="sourceLineNo">108</span><a name="line.108"></a>
+<span class="sourceLineNo">109</span> public ZKReplicationQueueStorage(ZKWatcher zookeeper, Configuration conf) {<a name="line.109"></a>
+<span class="sourceLineNo">110</span> super(zookeeper, conf);<a name="line.110"></a>
+<span class="sourceLineNo">111</span><a name="line.111"></a>
+<span class="sourceLineNo">112</span> String queuesZNodeName = conf.get("zookeeper.znode.replication.rs", "rs");<a name="line.112"></a>
+<span class="sourceLineNo">113</span> String hfileRefsZNodeName = conf.get(ZOOKEEPER_ZNODE_REPLICATION_HFILE_REFS_KEY,<a name="line.113"></a>
+<span class="sourceLineNo">114</span> ZOOKEEPER_ZNODE_REPLICATION_HFILE_REFS_DEFAULT);<a name="line.114"></a>
+<span class="sourceLineNo">115</span> this.queuesZNode = ZNodePaths.joinZNode(replicationZNode, queuesZNodeName);<a name="line.115"></a>
+<span class="sourceLineNo">116</span> this.hfileRefsZNode = ZNodePaths.joinZNode(replicationZNode, hfileRefsZNodeName);<a name="line.116"></a>
+<span class="sourceLineNo">117</span> this.regionsZNode = ZNodePaths.joinZNode(replicationZNode, conf<a name="line.117"></a>
+<span class="sourceLineNo">118</span> .get(ZOOKEEPER_ZNODE_REPLICATION_REGIONS_KEY, ZOOKEEPER_ZNODE_REPLICATION_REGIONS_DEFAULT));<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> private String getRsNode(ServerName serverName) {<a name="line.121"></a>
+<span class="sourceLineNo">122</span> return ZNodePaths.joinZNode(queuesZNode, serverName.getServerName());<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> private String getQueueNode(ServerName serverName, String queueId) {<a name="line.125"></a>
+<span class="sourceLineNo">126</span> return ZNodePaths.joinZNode(getRsNode(serverName), queueId);<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> private String getFileNode(String queueNode, String fileName) {<a name="line.129"></a>
+<span class="sourceLineNo">130</span> return ZNodePaths.joinZNode(queueNode, fileName);<a name="line.130"></a>
+<span class="sourceLineNo">131</span> }<a name="line.131"></a>
+<span class="sourceLineNo">132</span><a name="line.132"></a>
+<span class="sourceLineNo">133</span> private String getFileNode(ServerName serverName, String queueId, String fileName) {<a name="line.133"></a>
+<span class="sourceLineNo">134</span> return getFileNode(getQueueNode(serverName, queueId), fileName);<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> * <p><a name="line.138"></a>
+<span class="sourceLineNo">139</span> * Put all regions under /hbase/replication/regions znode will lead to too many children because<a name="line.139"></a>
+<span class="sourceLineNo">140</span> * of the huge number of regions in real production environment. So here we will distribute the<a name="line.140"></a>
+<span class="sourceLineNo">141</span> * znodes to multiple directories.<a name="line.141"></a>
+<span class="sourceLineNo">142</span> * </p><a name="line.142"></a>
+<span class="sourceLineNo">143</span> * <p><a name="line.143"></a>
+<span class="sourceLineNo">144</span> * So the final znode path will be format like this:<a name="line.144"></a>
+<span class="sourceLineNo">145</span> *<a name="line.145"></a>
+<span class="sourceLineNo">146</span> * <pre><a name="line.146"></a>
+<span class="sourceLineNo">147</span> * /hbase/replication/regions/dd/04/e76a6966d4ffa908ed0586764767-100<a name="line.147"></a>
+<span class="sourceLineNo">148</span> * </pre><a name="line.148"></a>
+<span class="sourceLineNo">149</span> *<a name="line.149"></a>
+<span class="sourceLineNo">150</span> * Here the full encoded region name is dd04e76a6966d4ffa908ed0586764767, and we use the first two<a name="line.150"></a>
+<span class="sourceLineNo">151</span> * characters 'dd' as the first level directory name, and use the next two characters '04' as the<a name="line.151"></a>
+<span class="sourceLineNo">152</span> * second level directory name, and the rest part as the prefix of the znode, and the suffix '100'<a name="line.152"></a>
+<span class="sourceLineNo">153</span> * is the peer id.<a name="line.153"></a>
+<span class="sourceLineNo">154</span> * </p><a name="line.154"></a>
+<span class="sourceLineNo">155</span> * @param encodedRegionName the encoded region name.<a name="line.155"></a>
+<span class="sourceLineNo">156</span> * @param peerId peer id for replication.<a name="line.156"></a>
+<span class="sourceLineNo">157</span> * @return ZNode path to persist the max sequence id that we've pushed for the given region and<a name="line.157"></a>
+<span class="sourceLineNo">158</span> * peer.<a name="line.158"></a>
+<span class="sourceLineNo">159</span> */<a name="line.159"></a>
+<span class="sourceLineNo">160</span> @VisibleForTesting<a name="line.160"></a>
+<span class="sourceLineNo">161</span> String getSerialReplicationRegionPeerNode(String encodedRegionName, String peerId) {<a name="line.161"></a>
+<span class="sourceLineNo">162</span> if (encodedRegionName == null || encodedRegionName.length() != RegionInfo.MD5_HEX_LENGTH) {<a name="line.162"></a>
+<span class="sourceLineNo">163</span> throw new IllegalArgumentException(<a name="line.163"></a>
+<span class="sourceLineNo">164</span> "Invalid encoded region name: " + encodedRegionName + ", length should be 32.");<a name="line.164"></a>
+<span class="sourceLineNo">165</span> }<a name="line.165"></a>
+<span class="sourceLineNo">166</span> return new StringBuilder(regionsZNode).append(ZNodePaths.ZNODE_PATH_SEPARATOR)<a name="line.166"></a>
+<span class="sourceLineNo">167</span> .append(encodedRegionName.substring(0, 2)).append(ZNodePaths.ZNODE_PATH_SEPARATOR)<a name="line.167"></a>
+<span class="sourceLineNo">168</span> .append(encodedRegionName.substring(2, 4)).append(ZNodePaths.ZNODE_PATH_SEPARATOR)<a name="line.168"></a>
+<span class="sourceLineNo">169</span> .append(encodedRegionName.substring(4)).append("-").append(peerId).toString();<a name="line.169"></a>
+<span class="sourceLineNo">170</span> }<a name="line.170"></a>
+<span class="sourceLineNo">171</span><a name="line.171"></a>
+<span class="sourceLineNo">172</span> @Override<a name="line.172"></a>
+<span class="sourceLineNo">173</span> public void removeQueue(ServerName serverName, String queueId) throws ReplicationException {<a name="line.173"></a>
+<span class="sourceLineNo">174</span> try {<a name="line.174"></a>
+<span class="sourceLineNo">175</span> ZKUtil.deleteNodeRecursively(zookeeper, getQueueNode(serverName, queueId));<a name="line.175"></a>
+<span class="sourceLineNo">176</span> } catch (KeeperException e) {<a name="line.176"></a>
+<span class="sourceLineNo">177</span> throw new ReplicationException(<a name="line.177"></a>
+<span class="sourceLineNo">178</span> "Failed to delete queue (serverName=" + serverName + ", queueId=" + queueId + ")", e);<a name="line.178"></a>
+<span class="sourceLineNo">179</span> }<a name="line.179"></a>
+<span class="sourceLineNo">180</span> }<a name="line.180"></a>
+<span class="sourceLineNo">181</span><a name="line.181"></a>
+<span class="sourceLineNo">182</span> @Override<a name="line.182"></a>
+<span class="sourceLineNo">183</span> public void addWAL(ServerName serverName, String queueId, String fileName)<a name="line.183"></a>
+<span class="sourceLineNo">184</span> throws ReplicationException {<a name="line.184"></a>
+<span class="sourceLineNo">185</span> try {<a name="line.185"></a>
+<span class="sourceLineNo">186</span> ZKUtil.createWithParents(zookeeper, getFileNode(serverName, queueId, fileName));<a name="line.186"></a>
+<span class="sourceLineNo">187</span> } catch (KeeperException e) {<a name="line.187"></a>
+<span class="sourceLineNo">188</span> throw new ReplicationException("Failed to add wal to queue (serverName=" + serverName<a name="line.188"></a>
+<span class="sourceLineNo">189</span> + ", queueId=" + queueId + ", fileName=" + fileName + ")", e);<a name="line.189"></a>
+<span class="sourceLineNo">190</span> }<a name="line.190"></a>
+<span class="sourceLineNo">191</span> }<a name="line.191"></a>
+<span class="sourceLineNo">192</span><a name="line.192"></a>
+<span class="sourceLineNo">193</span> @Override<a name="line.193"></a>
+<span class="sourceLineNo">194</span> public void removeWAL(ServerName serverName, String queueId, String fileName)<a name="line.194"></a>
+<span class="sourceLineNo">195</span> throws ReplicationException {<a name="line.195"></a>
+<span class="sourceLineNo">196</span> String fileNode = getFileNode(serverName, queueId, fileName);<a name="line.196"></a>
+<span class="sourceLineNo">197</span> try {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> ZKUtil.deleteNode(zookeeper, fileNode);<a name="line.198"></a>
+<span class="sourceLineNo">199</span> } catch (NoNodeException e) {<a name="line.199"></a>
+<span class="sourceLineNo">200</span> LOG.warn("{} already deleted when removing log", fileNode);<a name="line.200"></a>
+<span class="sourceLineNo">201</span> } catch (KeeperException e) {<a name="line.201"></a>
+<span class="sourceLineNo">202</span> throw new ReplicationException("Failed to remove wal from queue (serverName=" + serverName +<a name="line.202"></a>
+<span class="sourceLineNo">203</span> ", queueId=" + queueId + ", fileName=" + fileName + ")", e);<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><a name="line.206"></a>
+<span class="sourceLineNo">207</span> private void addLastSeqIdsToOps(String queueId, Map<String, Long> lastSeqIds,<a name="line.207"></a>
+<span class="sourceLineNo">208</span> List<ZKUtilOp> listOfOps) throws KeeperException, ReplicationException {<a name="line.208"></a>
+<span class="sourceLineNo">209</span> String peerId = new ReplicationQueueInfo(queueId).getPeerId();<a name="line.209"></a>
+<span class="sourceLineNo">210</span> for (Entry<String, Long> lastSeqEntry : lastSeqIds.entrySet()) {<a name="line.210"></a>
+<span class="sourceLineNo">211</span> String path = getSerialReplicationRegionPeerNode(lastSeqEntry.getKey(), peerId);<a name="line.211"></a>
+<span class="sourceLineNo">212</span> Pair<Long, Integer> p = getLastSequenceIdWithVersion(lastSeqEntry.getKey(), peerId);<a name="line.212"></a>
+<span class="sourceLineNo">213</span> byte[] data = ZKUtil.positionToByteArray(lastSeqEntry.getValue());<a name="line.213"></a>
+<span class="sourceLineNo">214</span> if (p.getSecond() < 0) { // ZNode does not exist.<a name="line.214"></a>
+<span class="sourceLineNo">215</span> ZKUtil.createWithParents(zookeeper,<a name="line.215"></a>
+<span class="sourceLineNo">216</span> path.substring(0, path.lastIndexOf(ZNodePaths.ZNODE_PATH_SEPARATOR)));<a name="line.216"></a>
+<span class="sourceLineNo">217</span> listOfOps.add(ZKUtilOp.createAndFailSilent(path, data));<a name="line.217"></a>
+<span class="sourceLineNo">218</span> continue;<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span> // Perform CAS in a specific version v0 (HBASE-20138)<a name="line.220"></a>
+<span class="sourceLineNo">221</span> int v0 = p.getSecond();<a name="line.221"></a>
+<span class="sourceLineNo">222</span> long lastPushedSeqId = p.getFirst();<a name="line.222"></a>
+<span class="sourceLineNo">223</span> if (lastSeqEntry.getValue() <= lastPushedSeqId) {<a name="line.223"></a>
+<span class="sourceLineNo">224</span> continue;<a name="line.224"></a>
+<span class="sourceLineNo">225</span> }<a name="line.225"></a>
+<span class="sourceLineNo">226</span> listOfOps.add(ZKUtilOp.setData(path, data, v0));<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><a name="line.229"></a>
+<span class="sourceLineNo">230</span> @Override<a name="line.230"></a>
+<span class="sourceLineNo">231</span> public void setWALPosition(ServerName serverName, String queueId, String fileName, long position,<a name="line.231"></a>
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