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| <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.master;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import static org.junit.Assert.assertEquals;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.junit.Assert.assertNotEquals;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.junit.Assert.assertNotNull;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.io.IOException;<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.concurrent.TimeUnit;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configuration;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.ClusterMetrics;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HBaseTestingUtil;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.LocalHBaseCluster;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.SingleProcessHBaseCluster;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.StartTestingClusterOption;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.RetriesExhaustedException;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.exceptions.ConnectionClosedException;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.testclassification.LargeTests;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.util.JVMClusterUtil.MasterThread;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.junit.Before;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.junit.ClassRule;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.junit.Test;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.junit.experimental.categories.Category;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.slf4j.Logger;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import org.slf4j.LoggerFactory;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span>import org.apache.hbase.thirdparty.org.apache.commons.collections4.CollectionUtils;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span>@Category({ MasterTests.class, LargeTests.class })<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>public class TestMasterShutdown {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> private static final Logger LOG = LoggerFactory.getLogger(TestMasterShutdown.class);<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> @ClassRule<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> HBaseClassTestRule.forClass(TestMasterShutdown.class);<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> private HBaseTestingUtil htu;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> @Before<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> public void shutdownCluster() throws IOException {<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> if (htu != null) {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> // an extra check in case the test cluster was not terminated after HBaseClassTestRule's<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> // Timeout interrupted the test thread.<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> LOG.warn("found non-null TestingUtility -- previous test did not terminate cleanly.");<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> htu.shutdownMiniCluster();<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> }<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> /**<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * Simple test of shutdown.<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * <p><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * Starts with three masters. Tells the active master to shutdown the cluster. Verifies that all<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * masters are properly shutdown.<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> */<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> @Test<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> public void testMasterShutdown() throws Exception {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> // Create config to use for this cluster<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> Configuration conf = HBaseConfiguration.create();<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> // Start the cluster<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> try {<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> htu = new HBaseTestingUtil(conf);<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> StartTestingClusterOption option = StartTestingClusterOption.builder().numMasters(3)<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> .numRegionServers(1).numDataNodes(1).build();<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> final SingleProcessHBaseCluster cluster = htu.startMiniCluster(option);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span><a name="line.87"></a> |
| <span class="sourceLineNo">088</span> // wait for all master thread to spawn and start their run loop.<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> final long thirtySeconds = TimeUnit.SECONDS.toMillis(30);<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> final long oneSecond = TimeUnit.SECONDS.toMillis(1);<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> assertNotEquals(-1, htu.waitFor(thirtySeconds, oneSecond, () -> {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> final List<MasterThread> masterThreads = cluster.getMasterThreads();<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> return masterThreads != null && masterThreads.size() >= 3<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> && masterThreads.stream().allMatch(Thread::isAlive);<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> // find the active master<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> final HMaster active = cluster.getMaster();<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> assertNotNull(active);<a name="line.99"></a> |
| <span class="sourceLineNo">100</span><a name="line.100"></a> |
| <span class="sourceLineNo">101</span> // make sure the other two are backup masters<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> ClusterMetrics status = active.getClusterMetrics();<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> assertEquals(2, status.getBackupMasterNames().size());<a name="line.103"></a> |
| <span class="sourceLineNo">104</span><a name="line.104"></a> |
| <span class="sourceLineNo">105</span> // tell the active master to shutdown the cluster<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> active.shutdown();<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> assertNotEquals(-1, htu.waitFor(thirtySeconds, oneSecond,<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> () -> CollectionUtils.isEmpty(cluster.getLiveMasterThreads())));<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> assertNotEquals(-1, htu.waitFor(thirtySeconds, oneSecond,<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> () -> CollectionUtils.isEmpty(cluster.getLiveRegionServerThreads())));<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> } finally {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> if (htu != null) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> htu.shutdownMiniCluster();<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> htu = null;<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> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span><a name="line.118"></a> |
| <span class="sourceLineNo">119</span> /**<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> * This test appears to be an intentional race between a thread that issues a shutdown RPC to the<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> * master, while the master is concurrently realizing it cannot initialize because there are no<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> * region servers available to it. The expected behavior is that master initialization is<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> * interruptable via said shutdown RPC.<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> */<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> @Test<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> public void testMasterShutdownBeforeStartingAnyRegionServer() throws Exception {<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> LocalHBaseCluster hbaseCluster = null;<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> try {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> htu = new HBaseTestingUtil(createMasterShutdownBeforeStartingAnyRegionServerConfiguration());<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> // configure a cluster with<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> final StartTestingClusterOption options = StartTestingClusterOption.builder().numDataNodes(1)<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> .numMasters(1).numRegionServers(0).masterClass(HMaster.class)<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> .rsClass(SingleProcessHBaseCluster.MiniHBaseClusterRegionServer.class).createRootDir(true)<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> .build();<a name="line.135"></a> |
| <span class="sourceLineNo">136</span><a name="line.136"></a> |
| <span class="sourceLineNo">137</span> // Can't simply `htu.startMiniCluster(options)` because that method waits for the master to<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> // start completely. However, this test's premise is that a partially started master should<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> // still respond to a shutdown RPC. So instead, we manage each component lifecycle<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> // independently.<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> // I think it's not worth refactoring HTU's helper methods just for this class.<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> htu.startMiniDFSCluster(options.getNumDataNodes());<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> htu.startMiniZKCluster(options.getNumZkServers());<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> htu.createRootDir();<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> hbaseCluster = new LocalHBaseCluster(htu.getConfiguration(), options.getNumMasters(),<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> options.getNumRegionServers(), options.getMasterClass(), options.getRsClass());<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> final MasterThread masterThread = hbaseCluster.getMasters().get(0);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span><a name="line.148"></a> |
| <span class="sourceLineNo">149</span> masterThread.start();<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> // Switching to master registry exacerbated a race in the master bootstrap that can result<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> // in a lost shutdown command (HBASE-8422, HBASE-23836). The race is essentially because<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> // the server manager in HMaster is not initialized by the time shutdown() RPC (below) is<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> // made to the master. The suspected reason as to why it was uncommon before HBASE-18095<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> // is because the connection creation with ZK registry is so slow that by then the server<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> // manager is usually init'ed in time for the RPC to be made. For now, adding an explicit<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> // wait() in the test, waiting for the server manager to become available.<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> final long timeout = TimeUnit.MINUTES.toMillis(10);<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> assertNotEquals("timeout waiting for server manager to become available.", -1,<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> htu.waitFor(timeout, () -> masterThread.getMaster().getServerManager() != null));<a name="line.159"></a> |
| <span class="sourceLineNo">160</span><a name="line.160"></a> |
| <span class="sourceLineNo">161</span> // Master has come up far enough that we can terminate it without creating a zombie.<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> try {<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> // HBASE-24327 : (Resolve Flaky connection issues)<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> // shutdown() RPC can have flaky ZK connection issues.<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> // e.g<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> // ERROR [RpcServer.priority.RWQ.Fifo.read.handler=1,queue=1,port=53033]<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> // master.HMaster(2878): ZooKeeper exception trying to set cluster as down in ZK<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> // org.apache.zookeeper.KeeperException$SystemErrorException:<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> // KeeperErrorCode = SystemError<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> //<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> // However, even when above flakes happen, shutdown call does get completed even if<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> // RPC call has failure. Hence, subsequent retries will never succeed as HMaster is<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> // already shutdown. Hence, it can fail. To resolve it, after making one shutdown()<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> // call, we are ignoring IOException.<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> htu.getConnection().getAdmin().shutdown();<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> } catch (RetriesExhaustedException e) {<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> if (e.getCause() instanceof ConnectionClosedException) {<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> LOG.info("Connection is Closed to the cluster. The cluster is already down.", e);<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> } else {<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> throw e;<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> LOG.info("Shutdown RPC sent.");<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> masterThread.join();<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> } finally {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> if (hbaseCluster != null) {<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> hbaseCluster.shutdown();<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> }<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> if (htu != null) {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> htu.shutdownMiniCluster();<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> htu = null;<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> }<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> }<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> }<a name="line.194"></a> |
| <span class="sourceLineNo">195</span><a name="line.195"></a> |
| <span class="sourceLineNo">196</span> /**<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> * Create a cluster configuration suitable for<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> * {@link #testMasterShutdownBeforeStartingAnyRegionServer()}.<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> */<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> private static Configuration createMasterShutdownBeforeStartingAnyRegionServerConfiguration() {<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> final Configuration conf = HBaseConfiguration.create();<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> // make sure the master will wait forever in the absence of a RS.<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> conf.setInt(ServerManager.WAIT_ON_REGIONSERVERS_MINTOSTART, 1);<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> // don't need a long write pipeline for this test.<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> conf.setInt("dfs.replication", 1);<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> // reduce client retries<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> conf.setInt("hbase.client.retries.number", 1);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> // Recoverable ZK configs are tuned more aggressively<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> conf.setInt(ReadOnlyZKClient.RECOVERY_RETRY, 3);<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> conf.setInt(ReadOnlyZKClient.RECOVERY_RETRY_INTERVAL_MILLIS, 100);<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> return conf;<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> }<a name="line.212"></a> |
| <span class="sourceLineNo">213</span>}<a name="line.213"></a> |
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| </div> |
| </body> |
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