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<pre><span class="source-line-no">001</span><span id="line-1">/*</span>
<span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span>
<span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span>
<span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span>
<span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span>
<span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span>
<span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span>
<span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span>
<span class="source-line-no">009</span><span id="line-9"> *</span>
<span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="source-line-no">011</span><span id="line-11"> *</span>
<span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span>
<span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
<span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span>
<span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span>
<span class="source-line-no">017</span><span id="line-17"> */</span>
<span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.master.assignment;</span>
<span class="source-line-no">019</span><span id="line-19"></span>
<span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span>
<span class="source-line-no">021</span><span id="line-21">import java.util.concurrent.CountDownLatch;</span>
<span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.HBaseClassTestRule;</span>
<span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.HBaseTestingUtil;</span>
<span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.ProcedureTestUtil;</span>
<span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.ServerName;</span>
<span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.TableName;</span>
<span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.client.Put;</span>
<span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.client.RegionInfo;</span>
<span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.client.Table;</span>
<span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.master.HMaster;</span>
<span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.master.ServerManager;</span>
<span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;</span>
<span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.master.procedure.ServerCrashProcedure;</span>
<span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.master.procedure.ServerProcedureInterface;</span>
<span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.procedure2.Procedure;</span>
<span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;</span>
<span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;</span>
<span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException;</span>
<span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.procedure2.ProcedureYieldException;</span>
<span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.regionserver.HRegionServer;</span>
<span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.testclassification.MasterTests;</span>
<span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.testclassification.MediumTests;</span>
<span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.util.Bytes;</span>
<span class="source-line-no">044</span><span id="line-44">import org.junit.AfterClass;</span>
<span class="source-line-no">045</span><span id="line-45">import org.junit.BeforeClass;</span>
<span class="source-line-no">046</span><span id="line-46">import org.junit.ClassRule;</span>
<span class="source-line-no">047</span><span id="line-47">import org.junit.Test;</span>
<span class="source-line-no">048</span><span id="line-48">import org.junit.experimental.categories.Category;</span>
<span class="source-line-no">049</span><span id="line-49">import org.slf4j.Logger;</span>
<span class="source-line-no">050</span><span id="line-50">import org.slf4j.LoggerFactory;</span>
<span class="source-line-no">051</span><span id="line-51"></span>
<span class="source-line-no">052</span><span id="line-52">/**</span>
<span class="source-line-no">053</span><span id="line-53"> * Confirm that we will do backoff when retrying on closing a region, to avoid consuming all the</span>
<span class="source-line-no">054</span><span id="line-54"> * CPUs.</span>
<span class="source-line-no">055</span><span id="line-55"> */</span>
<span class="source-line-no">056</span><span id="line-56">@Category({ MasterTests.class, MediumTests.class })</span>
<span class="source-line-no">057</span><span id="line-57">public class TestCloseRegionWhileRSCrash {</span>
<span class="source-line-no">058</span><span id="line-58"> private static final Logger LOG = LoggerFactory.getLogger(TestCloseRegionWhileRSCrash.class);</span>
<span class="source-line-no">059</span><span id="line-59"></span>
<span class="source-line-no">060</span><span id="line-60"> @ClassRule</span>
<span class="source-line-no">061</span><span id="line-61"> public static final HBaseClassTestRule CLASS_RULE =</span>
<span class="source-line-no">062</span><span id="line-62"> HBaseClassTestRule.forClass(TestCloseRegionWhileRSCrash.class);</span>
<span class="source-line-no">063</span><span id="line-63"></span>
<span class="source-line-no">064</span><span id="line-64"> private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();</span>
<span class="source-line-no">065</span><span id="line-65"></span>
<span class="source-line-no">066</span><span id="line-66"> private static TableName TABLE_NAME = TableName.valueOf("Backoff");</span>
<span class="source-line-no">067</span><span id="line-67"></span>
<span class="source-line-no">068</span><span id="line-68"> private static byte[] CF = Bytes.toBytes("cf");</span>
<span class="source-line-no">069</span><span id="line-69"></span>
<span class="source-line-no">070</span><span id="line-70"> private static CountDownLatch ARRIVE = new CountDownLatch(1);</span>
<span class="source-line-no">071</span><span id="line-71"></span>
<span class="source-line-no">072</span><span id="line-72"> private static CountDownLatch RESUME = new CountDownLatch(1);</span>
<span class="source-line-no">073</span><span id="line-73"></span>
<span class="source-line-no">074</span><span id="line-74"> public static final class DummyServerProcedure extends Procedure&lt;MasterProcedureEnv&gt;</span>
<span class="source-line-no">075</span><span id="line-75"> implements ServerProcedureInterface {</span>
<span class="source-line-no">076</span><span id="line-76"></span>
<span class="source-line-no">077</span><span id="line-77"> private ServerName serverName;</span>
<span class="source-line-no">078</span><span id="line-78"></span>
<span class="source-line-no">079</span><span id="line-79"> public DummyServerProcedure() {</span>
<span class="source-line-no">080</span><span id="line-80"> }</span>
<span class="source-line-no">081</span><span id="line-81"></span>
<span class="source-line-no">082</span><span id="line-82"> public DummyServerProcedure(ServerName serverName) {</span>
<span class="source-line-no">083</span><span id="line-83"> this.serverName = serverName;</span>
<span class="source-line-no">084</span><span id="line-84"> }</span>
<span class="source-line-no">085</span><span id="line-85"></span>
<span class="source-line-no">086</span><span id="line-86"> @Override</span>
<span class="source-line-no">087</span><span id="line-87"> public ServerName getServerName() {</span>
<span class="source-line-no">088</span><span id="line-88"> return serverName;</span>
<span class="source-line-no">089</span><span id="line-89"> }</span>
<span class="source-line-no">090</span><span id="line-90"></span>
<span class="source-line-no">091</span><span id="line-91"> @Override</span>
<span class="source-line-no">092</span><span id="line-92"> public boolean hasMetaTableRegion() {</span>
<span class="source-line-no">093</span><span id="line-93"> return false;</span>
<span class="source-line-no">094</span><span id="line-94"> }</span>
<span class="source-line-no">095</span><span id="line-95"></span>
<span class="source-line-no">096</span><span id="line-96"> @Override</span>
<span class="source-line-no">097</span><span id="line-97"> public ServerOperationType getServerOperationType() {</span>
<span class="source-line-no">098</span><span id="line-98"> return ServerOperationType.CRASH_HANDLER;</span>
<span class="source-line-no">099</span><span id="line-99"> }</span>
<span class="source-line-no">100</span><span id="line-100"></span>
<span class="source-line-no">101</span><span id="line-101"> @Override</span>
<span class="source-line-no">102</span><span id="line-102"> protected Procedure&lt;MasterProcedureEnv&gt;[] execute(MasterProcedureEnv env)</span>
<span class="source-line-no">103</span><span id="line-103"> throws ProcedureYieldException, ProcedureSuspendedException, InterruptedException {</span>
<span class="source-line-no">104</span><span id="line-104"> ARRIVE.countDown();</span>
<span class="source-line-no">105</span><span id="line-105"> RESUME.await();</span>
<span class="source-line-no">106</span><span id="line-106"> return null;</span>
<span class="source-line-no">107</span><span id="line-107"> }</span>
<span class="source-line-no">108</span><span id="line-108"></span>
<span class="source-line-no">109</span><span id="line-109"> @Override</span>
<span class="source-line-no">110</span><span id="line-110"> protected LockState acquireLock(final MasterProcedureEnv env) {</span>
<span class="source-line-no">111</span><span id="line-111"> if (env.getProcedureScheduler().waitServerExclusiveLock(this, getServerName())) {</span>
<span class="source-line-no">112</span><span id="line-112"> return LockState.LOCK_EVENT_WAIT;</span>
<span class="source-line-no">113</span><span id="line-113"> }</span>
<span class="source-line-no">114</span><span id="line-114"> return LockState.LOCK_ACQUIRED;</span>
<span class="source-line-no">115</span><span id="line-115"> }</span>
<span class="source-line-no">116</span><span id="line-116"></span>
<span class="source-line-no">117</span><span id="line-117"> @Override</span>
<span class="source-line-no">118</span><span id="line-118"> protected void releaseLock(final MasterProcedureEnv env) {</span>
<span class="source-line-no">119</span><span id="line-119"> env.getProcedureScheduler().wakeServerExclusiveLock(this, getServerName());</span>
<span class="source-line-no">120</span><span id="line-120"> }</span>
<span class="source-line-no">121</span><span id="line-121"></span>
<span class="source-line-no">122</span><span id="line-122"> @Override</span>
<span class="source-line-no">123</span><span id="line-123"> protected boolean holdLock(MasterProcedureEnv env) {</span>
<span class="source-line-no">124</span><span id="line-124"> return true;</span>
<span class="source-line-no">125</span><span id="line-125"> }</span>
<span class="source-line-no">126</span><span id="line-126"></span>
<span class="source-line-no">127</span><span id="line-127"> @Override</span>
<span class="source-line-no">128</span><span id="line-128"> protected void rollback(MasterProcedureEnv env) throws IOException, InterruptedException {</span>
<span class="source-line-no">129</span><span id="line-129"> }</span>
<span class="source-line-no">130</span><span id="line-130"></span>
<span class="source-line-no">131</span><span id="line-131"> @Override</span>
<span class="source-line-no">132</span><span id="line-132"> protected boolean abort(MasterProcedureEnv env) {</span>
<span class="source-line-no">133</span><span id="line-133"> return false;</span>
<span class="source-line-no">134</span><span id="line-134"> }</span>
<span class="source-line-no">135</span><span id="line-135"></span>
<span class="source-line-no">136</span><span id="line-136"> @Override</span>
<span class="source-line-no">137</span><span id="line-137"> protected void serializeStateData(ProcedureStateSerializer serializer) throws IOException {</span>
<span class="source-line-no">138</span><span id="line-138"></span>
<span class="source-line-no">139</span><span id="line-139"> }</span>
<span class="source-line-no">140</span><span id="line-140"></span>
<span class="source-line-no">141</span><span id="line-141"> @Override</span>
<span class="source-line-no">142</span><span id="line-142"> protected void deserializeStateData(ProcedureStateSerializer serializer) throws IOException {</span>
<span class="source-line-no">143</span><span id="line-143"> }</span>
<span class="source-line-no">144</span><span id="line-144"> }</span>
<span class="source-line-no">145</span><span id="line-145"></span>
<span class="source-line-no">146</span><span id="line-146"> @BeforeClass</span>
<span class="source-line-no">147</span><span id="line-147"> public static void setUp() throws Exception {</span>
<span class="source-line-no">148</span><span id="line-148"> UTIL.getConfiguration().setInt(ServerManager.WAIT_ON_REGIONSERVERS_MINTOSTART, 1);</span>
<span class="source-line-no">149</span><span id="line-149"> UTIL.startMiniCluster(3);</span>
<span class="source-line-no">150</span><span id="line-150"> UTIL.createTable(TABLE_NAME, CF);</span>
<span class="source-line-no">151</span><span id="line-151"> UTIL.getAdmin().balancerSwitch(false, true);</span>
<span class="source-line-no">152</span><span id="line-152"> HRegionServer srcRs = UTIL.getRSForFirstRegionInTable(TABLE_NAME);</span>
<span class="source-line-no">153</span><span id="line-153"> if (!srcRs.getRegions(TableName.META_TABLE_NAME).isEmpty()) {</span>
<span class="source-line-no">154</span><span id="line-154"> RegionInfo metaRegion = srcRs.getRegions(TableName.META_TABLE_NAME).get(0).getRegionInfo();</span>
<span class="source-line-no">155</span><span id="line-155"> HRegionServer dstRs = UTIL.getOtherRegionServer(srcRs);</span>
<span class="source-line-no">156</span><span id="line-156"> UTIL.getAdmin().move(metaRegion.getEncodedNameAsBytes(), dstRs.getServerName());</span>
<span class="source-line-no">157</span><span id="line-157"> UTIL.waitFor(30000, () -&gt; !dstRs.getRegions(TableName.META_TABLE_NAME).isEmpty());</span>
<span class="source-line-no">158</span><span id="line-158"> }</span>
<span class="source-line-no">159</span><span id="line-159"> }</span>
<span class="source-line-no">160</span><span id="line-160"></span>
<span class="source-line-no">161</span><span id="line-161"> @AfterClass</span>
<span class="source-line-no">162</span><span id="line-162"> public static void tearDown() throws Exception {</span>
<span class="source-line-no">163</span><span id="line-163"> UTIL.shutdownMiniCluster();</span>
<span class="source-line-no">164</span><span id="line-164"> }</span>
<span class="source-line-no">165</span><span id="line-165"></span>
<span class="source-line-no">166</span><span id="line-166"> @Test</span>
<span class="source-line-no">167</span><span id="line-167"> public void testRetryBackoff() throws IOException, InterruptedException {</span>
<span class="source-line-no">168</span><span id="line-168"> HRegionServer srcRs = UTIL.getRSForFirstRegionInTable(TABLE_NAME);</span>
<span class="source-line-no">169</span><span id="line-169"> RegionInfo region = srcRs.getRegions(TABLE_NAME).get(0).getRegionInfo();</span>
<span class="source-line-no">170</span><span id="line-170"> HRegionServer dstRs = UTIL.getOtherRegionServer(srcRs);</span>
<span class="source-line-no">171</span><span id="line-171"> ProcedureExecutor&lt;MasterProcedureEnv&gt; procExec =</span>
<span class="source-line-no">172</span><span id="line-172"> UTIL.getMiniHBaseCluster().getMaster().getMasterProcedureExecutor();</span>
<span class="source-line-no">173</span><span id="line-173"> procExec.submitProcedure(new DummyServerProcedure(srcRs.getServerName()));</span>
<span class="source-line-no">174</span><span id="line-174"> ARRIVE.await();</span>
<span class="source-line-no">175</span><span id="line-175"> UTIL.getMiniHBaseCluster().killRegionServer(srcRs.getServerName());</span>
<span class="source-line-no">176</span><span id="line-176"> UTIL.waitFor(30000,</span>
<span class="source-line-no">177</span><span id="line-177"> () -&gt; procExec.getProcedures().stream().anyMatch(p -&gt; p instanceof ServerCrashProcedure));</span>
<span class="source-line-no">178</span><span id="line-178"> Thread t = new Thread(() -&gt; {</span>
<span class="source-line-no">179</span><span id="line-179"> try {</span>
<span class="source-line-no">180</span><span id="line-180"> UTIL.getAdmin().move(region.getEncodedNameAsBytes(), dstRs.getServerName());</span>
<span class="source-line-no">181</span><span id="line-181"> } catch (IOException e) {</span>
<span class="source-line-no">182</span><span id="line-182"> LOG.info("Failed move of {}", region.getRegionNameAsString(), e);</span>
<span class="source-line-no">183</span><span id="line-183"> }</span>
<span class="source-line-no">184</span><span id="line-184"> });</span>
<span class="source-line-no">185</span><span id="line-185"> t.start();</span>
<span class="source-line-no">186</span><span id="line-186"> // wait until we enter the WAITING_TIMEOUT state</span>
<span class="source-line-no">187</span><span id="line-187"> ProcedureTestUtil.waitUntilProcedureWaitingTimeout(UTIL, TransitRegionStateProcedure.class,</span>
<span class="source-line-no">188</span><span id="line-188"> 30000);</span>
<span class="source-line-no">189</span><span id="line-189"> // wait until the timeout value increase three times</span>
<span class="source-line-no">190</span><span id="line-190"> ProcedureTestUtil.waitUntilProcedureTimeoutIncrease(UTIL, TransitRegionStateProcedure.class, 3);</span>
<span class="source-line-no">191</span><span id="line-191"> // close connection to make sure that we can not finish the TRSP</span>
<span class="source-line-no">192</span><span id="line-192"> final HMaster master = UTIL.getMiniHBaseCluster().getMaster();</span>
<span class="source-line-no">193</span><span id="line-193"> master.getConnection().close();</span>
<span class="source-line-no">194</span><span id="line-194"> RESUME.countDown();</span>
<span class="source-line-no">195</span><span id="line-195"> UTIL.waitFor(30000, () -&gt; !master.isAlive());</span>
<span class="source-line-no">196</span><span id="line-196"> // here we start a new master</span>
<span class="source-line-no">197</span><span id="line-197"> HMaster master2 = UTIL.getMiniHBaseCluster().startMaster().getMaster();</span>
<span class="source-line-no">198</span><span id="line-198"> LOG.info("Master2 {}, joining move thread", master2.getServerName());</span>
<span class="source-line-no">199</span><span id="line-199"> t.join();</span>
<span class="source-line-no">200</span><span id="line-200"> // Make sure that the region is online, it may not on the original target server, as we will set</span>
<span class="source-line-no">201</span><span id="line-201"> // forceNewPlan to true if there is a server crash</span>
<span class="source-line-no">202</span><span id="line-202"> try (Table table = UTIL.getConnection().getTable(TABLE_NAME)) {</span>
<span class="source-line-no">203</span><span id="line-203"> table.put(new Put(Bytes.toBytes(1)).addColumn(CF, Bytes.toBytes("cq"), Bytes.toBytes(1)));</span>
<span class="source-line-no">204</span><span id="line-204"> }</span>
<span class="source-line-no">205</span><span id="line-205"> // Make sure that the region is online, it may not be on the original target server, as we will</span>
<span class="source-line-no">206</span><span id="line-206"> // set forceNewPlan to true if there is a server crash.</span>
<span class="source-line-no">207</span><span id="line-207"> try (Table table = UTIL.getConnection().getTable(TABLE_NAME)) {</span>
<span class="source-line-no">208</span><span id="line-208"> table.put(new Put(Bytes.toBytes(1)).addColumn(CF, Bytes.toBytes("cq"), Bytes.toBytes(1)));</span>
<span class="source-line-no">209</span><span id="line-209"> }</span>
<span class="source-line-no">210</span><span id="line-210"> }</span>
<span class="source-line-no">211</span><span id="line-211">}</span>
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