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Posted to commits@hbase.apache.org by gi...@apache.org on 2017/12/03 15:18:45 UTC
[35/51] [partial] hbase-site git commit: Published site at .
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c54c242b/devapidocs/overview-tree.html
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diff --git a/devapidocs/overview-tree.html b/devapidocs/overview-tree.html
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http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c54c242b/devapidocs/src-html/org/apache/hadoop/hbase/CellScannable.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/CellScannable.html b/devapidocs/src-html/org/apache/hadoop/hbase/CellScannable.html
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http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c54c242b/devapidocs/src-html/org/apache/hadoop/hbase/CellScanner.html
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http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c54c242b/devapidocs/src-html/org/apache/hadoop/hbase/client/RpcRetryingCallerImpl.html
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+<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.CallQueueTooBigException;<a name="line.33"></a>
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+<span class="sourceLineNo">057</span><a name="line.57"></a>
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+<span class="sourceLineNo">112</span> ExceptionUtil.rethrowIfInterrupt(t);<a name="line.112"></a>
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+<span class="sourceLineNo">114</span> if (cause instanceof DoNotRetryIOException) {<a name="line.114"></a>
+<span class="sourceLineNo">115</span> // Fail fast<a name="line.115"></a>
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+<span class="sourceLineNo">117</span> }<a name="line.117"></a>
+<span class="sourceLineNo">118</span> // translateException throws exception when should not retry: i.e. when request is bad.<a name="line.118"></a>
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+<span class="sourceLineNo">120</span> t = translateException(t);<a name="line.120"></a>
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+<span class="sourceLineNo">125</span> .append(", retries=").append(tries).append(", started=")<a name="line.125"></a>
+<span class="sourceLineNo">126</span> .append((EnvironmentEdgeManager.currentTime() - tracker.getStartTime()))<a name="line.126"></a>
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+<span class="sourceLineNo">128</span> .append(", msg=").append(t.getMessage())<a name="line.128"></a>
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+<span class="sourceLineNo">138</span><a name="line.138"></a>
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+<span class="sourceLineNo">140</span> RetriesExhaustedException.ThrowableWithExtraContext qt =<a name="line.140"></a>
+<span class="sourceLineNo">141</span> new RetriesExhaustedException.ThrowableWithExtraContext(t,<a name="line.141"></a>
+<span class="sourceLineNo">142</span> EnvironmentEdgeManager.currentTime(), toString());<a name="line.142"></a>
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+<span class="sourceLineNo">144</span> if (tries >= maxAttempts - 1) {<a name="line.144"></a>
+<span class="sourceLineNo">145</span> throw new RetriesExhaustedException(tries, exceptions);<a name="line.145"></a>
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+<span class="sourceLineNo">148</span> // a chance to the regions to be moved<a name="line.148"></a>
+<span class="sourceLineNo">149</span> // get right pause time, start by RETRY_BACKOFF[0] * pauseBase, where pauseBase might be<a name="line.149"></a>
+<span class="sourceLineNo">150</span> // special when encountering CallQueueTooBigException, see #HBASE-17114<a name="line.150"></a>
+<span class="sourceLineNo">151</span> long pauseBase = (t instanceof CallQueueTooBigException) ? pauseForCQTBE : pause;<a name="line.151"></a>
+<span class="sourceLineNo">152</span> expectedSleep = callable.sleep(pauseBase, tries);<a name="line.152"></a>
+<span class="sourceLineNo">153</span><a name="line.153"></a>
+<span class="sourceLineNo">154</span> // If, after the planned sleep, there won't be enough time left, we stop now.<a name="line.154"></a>
+<span class="sourceLineNo">155</span> long duration = singleCallDuration(expectedSleep);<a name="line.155"></a>
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+<span class="sourceLineNo">157</span> String msg = "callTimeout=" + callTimeout + ", callDuration=" + duration +<a name="line.157"></a>
+<span class="sourceLineNo">158</span> ": " + t.getMessage() + " " + callable.getExceptionMessageAdditionalDetail();<a name="line.158"></a>
+<span class="sourceLineNo">159</span> throw (SocketTimeoutException)(new SocketTimeoutException(msg).initCause(t));<a name="line.159"></a>
+<span class="sourceLineNo">160</span> }<a name="line.160"></a>
+<span class="sourceLineNo">161</span> } finally {<a name="line.161"></a>
+<span class="sourceLineNo">162</span> interceptor.updateFailureInfo(context);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> }<a name="line.163"></a>
+<span class="sourceLineNo">164</span> try {<a name="line.164"></a>
+<span class="sourceLineNo">165</span> if (expectedSleep > 0) {<a name="line.165"></a>
+<span class="sourceLineNo">166</span> synchronized (cancelled) {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> if (cancelled.get()) return null;<a name="line.167"></a>
+<span class="sourceLineNo">168</span> cancelled.wait(expectedSleep);<a name="line.168"></a>
+<span class="sourceLineNo">169</span> }<a name="line.169"></a>
+<span class="sourceLineNo">170</span> }<a name="line.170"></a>
+<span class="sourceLineNo">171</span> if (cancelled.get()) return null;<a name="line.171"></a>
+<span class="sourceLineNo">172</span> } catch (InterruptedException e) {<a name="line.172"></a>
+<span class="sourceLineNo">173</span> throw new InterruptedIOException("Interrupted after " + tries<a name="line.173"></a>
+<span class="sourceLineNo">174</span> + " tries while maxAttempts=" + maxAttempts);<a name="line.174"></a>
+<span class="sourceLineNo">175</span> }<a name="line.175"></a>
+<span class="sourceLineNo">176</span> }<a name="line.176"></a>
+<span class="sourceLineNo">177</span> }<a name="line.177"></a>
+<span class="sourceLineNo">178</span><a name="line.178"></a>
+<span class="sourceLineNo">179</span> /**<a name="line.179"></a>
+<span class="sourceLineNo">180</span> * @return Calculate how long a single call took<a name="line.180"></a>
+<span class="sourceLineNo">181</span> */<a name="line.181"></a>
+<span class="sourceLineNo">182</span> private long singleCallDuration(final long expectedSleep) {<a name="line.182"></a>
+<span class="sourceLineNo">183</span> return (EnvironmentEdgeManager.currentTime() - tracker.getStartTime()) + expectedSleep;<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> @Override<a name="line.186"></a>
+<span class="sourceLineNo">187</span> public T callWithoutRetries(RetryingCallable<T> callable, int callTimeout)<a name="line.187"></a>
+<span class="sourceLineNo">188</span> throws IOException, RuntimeException {<a name="line.188"></a>
+<span class="sourceLineNo">189</span> // The code of this method should be shared with withRetries.<a name="line.189"></a>
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+<span class="sourceLineNo">194</span> Throwable t2 = translateException(t);<a name="line.194"></a>
+<span class="sourceLineNo">195</span> ExceptionUtil.rethrowIfInterrupt(t2);<a name="line.195"></a>
+<span class="sourceLineNo">196</span> // It would be nice to clear the location cache here.<a name="line.196"></a>
+<span class="sourceLineNo">197</span> if (t2 instanceof IOException) {<a name="line.197"></a>
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+<span class="sourceLineNo">205</span> /**<a name="line.205"></a>
+<span class="sourceLineNo">206</span> * Get the good or the remote exception if any, throws the DoNotRetryIOException.<a name="line.206"></a>
+<span class="sourceLineNo">207</span> * @param t the throwable to analyze<a name="line.207"></a>
+<span class="sourceLineNo">208</span> * @return the translated exception, if it's not a DoNotRetryIOException<a name="line.208"></a>
+<span class="sourceLineNo">209</span> * @throws DoNotRetryIOException - if we find it, we throw it instead of translating.<a name="line.209"></a>
+<span class="sourceLineNo">210</span> */<a name="line.210"></a>
+<span class="sourceLineNo">211</span> static Throwable translateException(Throwable t) throws DoNotRetryIOException {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> if (t instanceof UndeclaredThrowableException) {<a name="line.212"></a>
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+<span class="sourceLineNo">216</span> }<a name="line.216"></a>
+<span class="sourceLineNo">217</span> if (t instanceof RemoteException) {<a name="line.217"></a>
+<span class="sourceLineNo">218</span> t = ((RemoteException)t).unwrapRemoteException();<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span> if (t instanceof LinkageError) {<a name="line.220"></a>
+<span class="sourceLineNo">221</span> throw new DoNotRetryIOException(t);<a name="line.221"></a>
+<span class="sourceLineNo">222</span> }<a name="line.222"></a>
+<span class="sourceLineNo">223</span> if (t instanceof ServiceException) {<a name="line.223"></a>
+<span class="sourceLineNo">224</span> ServiceException se = (ServiceException)t;<a name="line.224"></a>
+<span class="sourceLineNo">225</span> Throwable cause = se.getCause();<a name="line.225"></a>
+<span class="sourceLineNo">226</span> if (cause != null && cause instanceof DoNotRetryIOException) {<a name="line.226"></a>
+<span class="sourceLineNo">227</span> throw (DoNotRetryIOException)cause;<a name="line.227"></a>
+<span class="sourceLineNo">228</span> }<a name="line.228"></a>
+<span class="sourceLineNo">229</span> // Don't let ServiceException out; its rpc specific.<a name="line.229"></a>
+<span class="sourceLineNo">230</span> t = cause;<a name="line.230"></a>
+<span class="sourceLineNo">231</span> // t could be a RemoteException so go around again.<a name="line.231"></a>
+<span class="sourceLineNo">232</span> translateException(t);<a name="line.232"></a>
+<span class="sourceLineNo">233</span> } else if (t instanceof DoNotRetryIOException) {<a name="line.233"></a>
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+<span class="sourceLineNo">235</span> }<a name="line.235"></a>
+<span class="sourceLineNo">236</span> return t;<a name="line.236"></a>
+<span class="sourceLineNo">237</span> }<a name="line.237"></a>
+<span class="sourceLineNo">238</span><a name="line.238"></a>
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+<span class="sourceLineNo">240</span> int timeout = tracker.getRemainingTime(callTimeout);<a name="line.240"></a>
+<span class="sourceLineNo">241</span> if (timeout <= 0 || rpcTimeout > 0 && rpcTimeout < timeout){<a name="line.241"></a>
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+<span class="sourceLineNo">243</span> }<a name="line.243"></a>
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+<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> @Override<a name="line.247"></a>
+<span class="sourceLineNo">248</span> public String toString() {<a name="line.248"></a>
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+<span class="sourceLineNo">251</span> }<a name="line.251"></a>
+<span class="sourceLineNo">252</span>}<a name="line.252"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c54c242b/devapidocs/src-html/org/apache/hadoop/hbase/client/ZKAsyncRegistry.Converter.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/client/ZKAsyncRegistry.Converter.html b/devapidocs/src-html/org/apache/hadoop/hbase/client/ZKAsyncRegistry.Converter.html
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--- /dev/null
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/client/ZKAsyncRegistry.Converter.html
@@ -0,0 +1,302 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
+<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
+<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
+<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
+<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
+<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
+<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
+<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
+<span class="sourceLineNo">009</span> *<a name="line.9"></a>
+<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
+<span class="sourceLineNo">011</span> *<a name="line.11"></a>
+<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
+<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
+<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
+<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
+<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
+<span class="sourceLineNo">017</span> */<a name="line.17"></a>
+<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.client;<a name="line.18"></a>
+<span class="sourceLineNo">019</span><a name="line.19"></a>
+<span class="sourceLineNo">020</span>import static org.apache.hadoop.hbase.client.RegionInfo.DEFAULT_REPLICA_ID;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.client.RegionInfoBuilder.FIRST_META_REGIONINFO;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import static org.apache.hadoop.hbase.client.RegionReplicaUtil.getRegionInfoForDefaultReplica;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import static org.apache.hadoop.hbase.client.RegionReplicaUtil.getRegionInfoForReplica;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import static org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.lengthOfPBMagic;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import static org.apache.hadoop.hbase.zookeeper.ZKMetadata.removeMetaData;<a name="line.25"></a>
+<span class="sourceLineNo">026</span><a name="line.26"></a>
+<span class="sourceLineNo">027</span>import java.io.IOException;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import java.util.concurrent.CompletableFuture;<a name="line.28"></a>
+<span class="sourceLineNo">029</span><a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.commons.lang3.mutable.MutableInt;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.commons.logging.Log;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.commons.logging.LogFactory;<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.hbase.ClusterId;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.RegionLocations;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.ServerName;<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.master.RegionState;<a name="line.39"></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.ReadOnlyZKClient;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.zookeeper.ZNodePaths;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.43"></a>
+<span class="sourceLineNo">044</span><a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ZooKeeperProtos;<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> * Fetch the registry data from zookeeper.<a name="line.50"></a>
+<span class="sourceLineNo">051</span> */<a name="line.51"></a>
+<span class="sourceLineNo">052</span>@InterfaceAudience.Private<a name="line.52"></a>
+<span class="sourceLineNo">053</span>class ZKAsyncRegistry implements AsyncRegistry {<a name="line.53"></a>
+<span class="sourceLineNo">054</span><a name="line.54"></a>
+<span class="sourceLineNo">055</span> private static final Log LOG = LogFactory.getLog(ZKAsyncRegistry.class);<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span> private final ReadOnlyZKClient zk;<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span> private final ZNodePaths znodePaths;<a name="line.59"></a>
+<span class="sourceLineNo">060</span><a name="line.60"></a>
+<span class="sourceLineNo">061</span> ZKAsyncRegistry(Configuration conf) {<a name="line.61"></a>
+<span class="sourceLineNo">062</span> this.znodePaths = new ZNodePaths(conf);<a name="line.62"></a>
+<span class="sourceLineNo">063</span> this.zk = new ReadOnlyZKClient(conf);<a name="line.63"></a>
+<span class="sourceLineNo">064</span> }<a name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span> private interface Converter<T> {<a name="line.66"></a>
+<span class="sourceLineNo">067</span> T convert(byte[] data) throws Exception;<a name="line.67"></a>
+<span class="sourceLineNo">068</span> }<a name="line.68"></a>
+<span class="sourceLineNo">069</span><a name="line.69"></a>
+<span class="sourceLineNo">070</span> private <T> CompletableFuture<T> getAndConvert(String path, Converter<T> converter) {<a name="line.70"></a>
+<span class="sourceLineNo">071</span> CompletableFuture<T> future = new CompletableFuture<>();<a name="line.71"></a>
+<span class="sourceLineNo">072</span> zk.get(path).whenComplete((data, error) -> {<a name="line.72"></a>
+<span class="sourceLineNo">073</span> if (error != null) {<a name="line.73"></a>
+<span class="sourceLineNo">074</span> future.completeExceptionally(error);<a name="line.74"></a>
+<span class="sourceLineNo">075</span> return;<a name="line.75"></a>
+<span class="sourceLineNo">076</span> }<a name="line.76"></a>
+<span class="sourceLineNo">077</span> try {<a name="line.77"></a>
+<span class="sourceLineNo">078</span> future.complete(converter.convert(data));<a name="line.78"></a>
+<span class="sourceLineNo">079</span> } catch (Exception e) {<a name="line.79"></a>
+<span class="sourceLineNo">080</span> future.completeExceptionally(e);<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> return future;<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> private static String getClusterId(byte[] data) throws DeserializationException {<a name="line.86"></a>
+<span class="sourceLineNo">087</span> if (data == null || data.length == 0) {<a name="line.87"></a>
+<span class="sourceLineNo">088</span> return null;<a name="line.88"></a>
+<span class="sourceLineNo">089</span> }<a name="line.89"></a>
+<span class="sourceLineNo">090</span> data = removeMetaData(data);<a name="line.90"></a>
+<span class="sourceLineNo">091</span> return ClusterId.parseFrom(data).toString();<a name="line.91"></a>
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+<span class="sourceLineNo">093</span><a name="line.93"></a>
+<span class="sourceLineNo">094</span> @Override<a name="line.94"></a>
+<span class="sourceLineNo">095</span> public CompletableFuture<String> getClusterId() {<a name="line.95"></a>
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+<span class="sourceLineNo">113</span><a name="line.113"></a>
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+<span class="sourceLineNo">115</span> CompletableFuture<RegionLocations> future) {<a name="line.115"></a>
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+<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> private Pair<RegionState.State, ServerName> getStateAndServerName(<a name="line.123"></a>
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+<span class="sourceLineNo">125</span> RegionState.State state;<a name="line.125"></a>
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+<span class="sourceLineNo">128</span> } else {<a name="line.128"></a>
+<span class="sourceLineNo">129</span> state = RegionState.State.OPEN;<a name="line.129"></a>
+<span class="sourceLineNo">130</span> }<a name="line.130"></a>
+<span class="sourceLineNo">131</span> HBaseProtos.ServerName snProto = proto.getServer();<a name="line.131"></a>
+<span class="sourceLineNo">132</span> return Pair.newPair(state,<a name="line.132"></a>
+<span class="sourceLineNo">133</span> ServerName.valueOf(snProto.getHostName(), snProto.getPort(), snProto.getStartCode()));<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> @Override<a name="line.136"></a>
+<span class="sourceLineNo">137</span> public CompletableFuture<RegionLocations> getMetaRegionLocation() {<a name="line.137"></a>
+<span class="sourceLineNo">138</span> CompletableFuture<RegionLocations> future = new CompletableFuture<>();<a name="line.138"></a>
+<span class="sourceLineNo">139</span> HRegionLocation[] locs = new HRegionLocation[znodePaths.metaReplicaZNodes.size()];<a name="line.139"></a>
+<span class="sourceLineNo">140</span> MutableInt remaining = new MutableInt(locs.length);<a name="line.140"></a>
+<span class="sourceLineNo">141</span> znodePaths.metaReplicaZNodes.forEach((replicaId, path) -> {<a name="line.141"></a>
+<span class="sourceLineNo">142</span> if (replicaId == DEFAULT_REPLICA_ID) {<a name="line.142"></a>
+<span class="sourceLineNo">143</span> getAndConvert(path, ZKAsyncRegistry::getMetaProto).whenComplete((proto, error) -> {<a name="line.143"></a>
+<span class="sourceLineNo">144</span> if (error != null) {<a name="line.144"></a>
+<span class="sourceLineNo">145</span> future.completeExceptionally(error);<a name="line.145"></a>
+<span class="sourceLineNo">146</span> return;<a name="line.146"></a>
+<span class="sourceLineNo">147</span> }<a name="line.147"></a>
+<span class="sourceLineNo">148</span> if (proto == null) {<a name="line.148"></a>
+<span class="sourceLineNo">149</span> future.completeExceptionally(new IOException("Meta znode is null"));<a name="line.149"></a>
+<span class="sourceLineNo">150</span> return;<a name="line.150"></a>
+<span class="sourceLineNo">151</span> }<a name="line.151"></a>
+<span class="sourceLineNo">152</span> Pair<RegionState.State, ServerName> stateAndServerName = getStateAndServerName(proto);<a name="line.152"></a>
+<span class="sourceLineNo">153</span> if (stateAndServerName.getFirst() != RegionState.State.OPEN) {<a name="line.153"></a>
+<span class="sourceLineNo">154</span> future.completeExceptionally(<a name="line.154"></a>
+<span class="sourceLineNo">155</span> new IOException("Meta region is in state " + stateAndServerName.getFirst()));<a name="line.155"></a>
+<span class="sourceLineNo">156</span> return;<a name="line.156"></a>
+<span class="sourceLineNo">157</span> }<a name="line.157"></a>
+<span class="sourceLineNo">158</span> locs[DEFAULT_REPLICA_ID] =<a name="line.158"></a>
+<span class="sourceLineNo">159</span> new HRegionLocation(getRegionInfoForDefaultReplica(FIRST_META_REGIONINFO),<a name="line.159"></a>
+<span class="sourceLineNo">160</span> stateAndServerName.getSecond());<a name="line.160"></a>
+<span class="sourceLineNo">161</span> tryComplete(remaining, locs, future);<a name="line.161"></a>
+<span class="sourceLineNo">162</span> });<a name="line.162"></a>
+<span class="sourceLineNo">163</span> } else {<a name="line.163"></a>
+<span class="sourceLineNo">164</span> getAndConvert(path, ZKAsyncRegistry::getMetaProto).whenComplete((proto, error) -> {<a name="line.164"></a>
+<span class="sourceLineNo">165</span> if (future.isDone()) {<a name="line.165"></a>
+<span class="sourceLineNo">166</span> return;<a name="line.166"></a>
+<span class="sourceLineNo">167</span> }<a name="line.167"></a>
+<span class="sourceLineNo">168</span> if (error != null) {<a name="line.168"></a>
+<span class="sourceLineNo">169</span> LOG.warn("Failed to fetch " + path, error);<a name="line.169"></a>
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+<span class="sourceLineNo">171</span> } else if (proto == null) {<a name="line.171"></a>
+<span class="sourceLineNo">172</span> LOG.warn("Meta znode for replica " + replicaId + " is null");<a name="line.172"></a>
+<span class="sourceLineNo">173</span> locs[replicaId] = null;<a name="line.173"></a>
+<span class="sourceLineNo">174</span> } else {<a name="line.174"></a>
+<span class="sourceLineNo">175</span> Pair<RegionState.State, ServerName> stateAndServerName = getStateAndServerName(proto);<a name="line.175"></a>
+<span class="sourceLineNo">176</span> if (stateAndServerName.getFirst() != RegionState.State.OPEN) {<a name="line.176"></a>
+<span class="sourceLineNo">177</span> LOG.warn("Meta region for replica " + replicaId + " is in state " +<a name="line.177"></a>
+<span class="sourceLineNo">178</span> stateAndServerName.getFirst());<a name="line.178"></a>
+<span class="sourceLineNo">179</span> locs[replicaId] = null;<a name="line.179"></a>
+<span class="sourceLineNo">180</span> } else {<a name="line.180"></a>
+<span class="sourceLineNo">181</span> locs[replicaId] =<a name="line.181"></a>
+<span class="sourceLineNo">182</span> new HRegionLocation(getRegionInfoForReplica(FIRST_META_REGIONINFO, replicaId),<a name="line.182"></a>
+<span class="sourceLineNo">183</span> stateAndServerName.getSecond());<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> tryComplete(remaining, locs, future);<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> return future;<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 CompletableFuture<Integer> getCurrentNrHRS() {<a name="line.194"></a>
+<span class="sourceLineNo">195</span> return zk.exists(znodePaths.rsZNode).thenApply(s -> s != null ? s.getNumChildren() : 0);<a name="line.195"></a>
+<span class="sourceLineNo">196</span> }<a name="line.196"></a>
+<span class="sourceLineNo">197</span><a name="line.197"></a>
+<span class="sourceLineNo">198</span> private static ZooKeeperProtos.Master getMasterProto(byte[] data) throws IOException {<a name="line.198"></a>
+<span class="sourceLineNo">199</span> if (data == null || data.length == 0) {<a name="line.199"></a>
+<span class="sourceLineNo">200</span> return null;<a name="line.200"></a>
+<span class="sourceLineNo">201</span> }<a name="line.201"></a>
+<span class="sourceLineNo">202</span> data = removeMetaData(data);<a name="line.202"></a>
+<span class="sourceLineNo">203</span> int prefixLen = lengthOfPBMagic();<a name="line.203"></a>
+<span class="sourceLineNo">204</span> return ZooKeeperProtos.Master.parser().parseFrom(data, prefixLen, data.length - prefixLen);<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> @Override<a name="line.207"></a>
+<span class="sourceLineNo">208</span> public CompletableFuture<ServerName> getMasterAddress() {<a name="line.208"></a>
+<span class="sourceLineNo">209</span> return getAndConvert(znodePaths.masterAddressZNode, ZKAsyncRegistry::getMasterProto)<a name="line.209"></a>
+<span class="sourceLineNo">210</span> .thenApply(proto -> {<a name="line.210"></a>
+<span class="sourceLineNo">211</span> if (proto == null) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> return null;<a name="line.212"></a>
+<span class="sourceLineNo">213</span> }<a name="line.213"></a>
+<span class="sourceLineNo">214</span> HBaseProtos.ServerName snProto = proto.getMaster();<a name="line.214"></a>
+<span class="sourceLineNo">215</span> return ServerName.valueOf(snProto.getHostName(), snProto.getPort(),<a name="line.215"></a>
+<span class="sourceLineNo">216</span> snProto.getStartCode());<a name="line.216"></a>
+<span class="sourceLineNo">217</span> });<a name="line.217"></a>
+<span class="sourceLineNo">218</span> }<a name="line.218"></a>
+<span class="sourceLineNo">219</span><a name="line.219"></a>
+<span class="sourceLineNo">220</span> @Override<a name="line.220"></a>
+<span class="sourceLineNo">221</span> public CompletableFuture<Integer> getMasterInfoPort() {<a name="line.221"></a>
+<span class="sourceLineNo">222</span> return getAndConvert(znodePaths.masterAddressZNode, ZKAsyncRegistry::getMasterProto)<a name="line.222"></a>
+<span class="sourceLineNo">223</span> .thenApply(proto -> proto != null ? proto.getInfoPort() : 0);<a name="line.223"></a>
+<span class="sourceLineNo">224</span> }<a name="line.224"></a>
+<span class="sourceLineNo">225</span><a name="line.225"></a>
+<span class="sourceLineNo">226</span> @Override<a name="line.226"></a>
+<span class="sourceLineNo">227</span> public void close() {<a name="line.227"></a>
+<span class="sourceLineNo">228</span> zk.close();<a name="line.228"></a>
+<span class="sourceLineNo">229</span> }<a name="line.229"></a>
+<span class="sourceLineNo">230</span>}<a name="line.230"></a>
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+</pre>
+</div>
+</body>
+</html>