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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 static org.junit.Assert.assertEquals;</span>
<span class="source-line-no">021</span><span id="line-21"></span>
<span class="source-line-no">022</span><span id="line-22">import java.io.IOException;</span>
<span class="source-line-no">023</span><span id="line-23">import java.net.ConnectException;</span>
<span class="source-line-no">024</span><span id="line-24">import java.util.List;</span>
<span class="source-line-no">025</span><span id="line-25">import java.util.concurrent.CopyOnWriteArrayList;</span>
<span class="source-line-no">026</span><span id="line-26">import java.util.concurrent.CountDownLatch;</span>
<span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.conf.Configuration;</span>
<span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.HBaseClassTestRule;</span>
<span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.HBaseTestingUtil;</span>
<span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.PleaseHoldException;</span>
<span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.ServerName;</span>
<span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.SingleProcessHBaseCluster.MiniHBaseClusterRegionServer;</span>
<span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.StartTestingClusterOption;</span>
<span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.TableName;</span>
<span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.client.RegionInfo;</span>
<span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.master.HMaster;</span>
<span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.master.MasterServices;</span>
<span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.master.RegionPlan;</span>
<span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.master.RegionServerList;</span>
<span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.master.RegionState;</span>
<span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.master.ServerManager;</span>
<span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.master.region.MasterRegion;</span>
<span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.regionserver.HRegionServer;</span>
<span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.regionserver.RSRpcServices;</span>
<span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.hbase.testclassification.LargeTests;</span>
<span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.hbase.testclassification.MasterTests;</span>
<span class="source-line-no">047</span><span id="line-47">import org.apache.hadoop.hbase.util.Bytes;</span>
<span class="source-line-no">048</span><span id="line-48">import org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread;</span>
<span class="source-line-no">049</span><span id="line-49">import org.junit.AfterClass;</span>
<span class="source-line-no">050</span><span id="line-50">import org.junit.BeforeClass;</span>
<span class="source-line-no">051</span><span id="line-51">import org.junit.ClassRule;</span>
<span class="source-line-no">052</span><span id="line-52">import org.junit.Test;</span>
<span class="source-line-no">053</span><span id="line-53">import org.junit.experimental.categories.Category;</span>
<span class="source-line-no">054</span><span id="line-54">import org.slf4j.Logger;</span>
<span class="source-line-no">055</span><span id="line-55">import org.slf4j.LoggerFactory;</span>
<span class="source-line-no">056</span><span id="line-56"></span>
<span class="source-line-no">057</span><span id="line-57">import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;</span>
<span class="source-line-no">058</span><span id="line-58">import org.apache.hbase.thirdparty.com.google.protobuf.ServiceException;</span>
<span class="source-line-no">059</span><span id="line-59"></span>
<span class="source-line-no">060</span><span id="line-60">import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;</span>
<span class="source-line-no">061</span><span id="line-61">import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.ExecuteProceduresRequest;</span>
<span class="source-line-no">062</span><span id="line-62">import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.ExecuteProceduresResponse;</span>
<span class="source-line-no">063</span><span id="line-63">import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition;</span>
<span class="source-line-no">064</span><span id="line-64">import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;</span>
<span class="source-line-no">065</span><span id="line-65">import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionRequest;</span>
<span class="source-line-no">066</span><span id="line-66">import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionResponse;</span>
<span class="source-line-no">067</span><span id="line-67"></span>
<span class="source-line-no">068</span><span id="line-68">/**</span>
<span class="source-line-no">069</span><span id="line-69"> * Testcase for HBASE-21811.</span>
<span class="source-line-no">070</span><span id="line-70"> */</span>
<span class="source-line-no">071</span><span id="line-71">@Category({ MasterTests.class, LargeTests.class })</span>
<span class="source-line-no">072</span><span id="line-72">public class TestWakeUpUnexpectedProcedure {</span>
<span class="source-line-no">073</span><span id="line-73"></span>
<span class="source-line-no">074</span><span id="line-74"> @ClassRule</span>
<span class="source-line-no">075</span><span id="line-75"> public static final HBaseClassTestRule CLASS_RULE =</span>
<span class="source-line-no">076</span><span id="line-76"> HBaseClassTestRule.forClass(TestWakeUpUnexpectedProcedure.class);</span>
<span class="source-line-no">077</span><span id="line-77"></span>
<span class="source-line-no">078</span><span id="line-78"> private static final Logger LOG = LoggerFactory.getLogger(TestWakeUpUnexpectedProcedure.class);</span>
<span class="source-line-no">079</span><span id="line-79"></span>
<span class="source-line-no">080</span><span id="line-80"> private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();</span>
<span class="source-line-no">081</span><span id="line-81"></span>
<span class="source-line-no">082</span><span id="line-82"> private static TableName NAME = TableName.valueOf("Assign");</span>
<span class="source-line-no">083</span><span id="line-83"></span>
<span class="source-line-no">084</span><span id="line-84"> private static final List&lt;ServerName&gt; EXCLUDE_SERVERS = new CopyOnWriteArrayList&lt;&gt;();</span>
<span class="source-line-no">085</span><span id="line-85"></span>
<span class="source-line-no">086</span><span id="line-86"> private static byte[] CF = Bytes.toBytes("cf");</span>
<span class="source-line-no">087</span><span id="line-87"></span>
<span class="source-line-no">088</span><span id="line-88"> private static volatile ServerName SERVER_TO_KILL;</span>
<span class="source-line-no">089</span><span id="line-89"></span>
<span class="source-line-no">090</span><span id="line-90"> private static volatile CountDownLatch ARRIVE_EXEC_PROC;</span>
<span class="source-line-no">091</span><span id="line-91"></span>
<span class="source-line-no">092</span><span id="line-92"> private static volatile CountDownLatch RESUME_EXEC_PROC;</span>
<span class="source-line-no">093</span><span id="line-93"></span>
<span class="source-line-no">094</span><span id="line-94"> private static volatile CountDownLatch RESUME_IS_SERVER_ONLINE;</span>
<span class="source-line-no">095</span><span id="line-95"></span>
<span class="source-line-no">096</span><span id="line-96"> private static volatile CountDownLatch ARRIVE_REPORT;</span>
<span class="source-line-no">097</span><span id="line-97"></span>
<span class="source-line-no">098</span><span id="line-98"> private static volatile CountDownLatch RESUME_REPORT;</span>
<span class="source-line-no">099</span><span id="line-99"></span>
<span class="source-line-no">100</span><span id="line-100"> private static final class RSRpcServicesForTest extends RSRpcServices {</span>
<span class="source-line-no">101</span><span id="line-101"></span>
<span class="source-line-no">102</span><span id="line-102"> public RSRpcServicesForTest(HRegionServer rs) throws IOException {</span>
<span class="source-line-no">103</span><span id="line-103"> super(rs);</span>
<span class="source-line-no">104</span><span id="line-104"> }</span>
<span class="source-line-no">105</span><span id="line-105"></span>
<span class="source-line-no">106</span><span id="line-106"> @Override</span>
<span class="source-line-no">107</span><span id="line-107"> public ExecuteProceduresResponse executeProcedures(RpcController controller,</span>
<span class="source-line-no">108</span><span id="line-108"> ExecuteProceduresRequest request) throws ServiceException {</span>
<span class="source-line-no">109</span><span id="line-109"> if (request.getOpenRegionCount() &gt; 0) {</span>
<span class="source-line-no">110</span><span id="line-110"> if (ARRIVE_EXEC_PROC != null) {</span>
<span class="source-line-no">111</span><span id="line-111"> SERVER_TO_KILL = getServer().getServerName();</span>
<span class="source-line-no">112</span><span id="line-112"> ARRIVE_EXEC_PROC.countDown();</span>
<span class="source-line-no">113</span><span id="line-113"> ARRIVE_EXEC_PROC = null;</span>
<span class="source-line-no">114</span><span id="line-114"> try {</span>
<span class="source-line-no">115</span><span id="line-115"> RESUME_EXEC_PROC.await();</span>
<span class="source-line-no">116</span><span id="line-116"> } catch (InterruptedException e) {</span>
<span class="source-line-no">117</span><span id="line-117"> throw new RuntimeException(e);</span>
<span class="source-line-no">118</span><span id="line-118"> }</span>
<span class="source-line-no">119</span><span id="line-119"> throw new ServiceException(new ConnectException("Inject error"));</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"> return super.executeProcedures(controller, request);</span>
<span class="source-line-no">123</span><span id="line-123"> }</span>
<span class="source-line-no">124</span><span id="line-124"> }</span>
<span class="source-line-no">125</span><span id="line-125"></span>
<span class="source-line-no">126</span><span id="line-126"> public static final class RSForTest extends MiniHBaseClusterRegionServer {</span>
<span class="source-line-no">127</span><span id="line-127"></span>
<span class="source-line-no">128</span><span id="line-128"> public RSForTest(Configuration conf) throws IOException, InterruptedException {</span>
<span class="source-line-no">129</span><span id="line-129"> super(conf);</span>
<span class="source-line-no">130</span><span id="line-130"> }</span>
<span class="source-line-no">131</span><span id="line-131"></span>
<span class="source-line-no">132</span><span id="line-132"> @Override</span>
<span class="source-line-no">133</span><span id="line-133"> protected RSRpcServices createRpcServices() throws IOException {</span>
<span class="source-line-no">134</span><span id="line-134"> return new RSRpcServicesForTest(this);</span>
<span class="source-line-no">135</span><span id="line-135"> }</span>
<span class="source-line-no">136</span><span id="line-136"> }</span>
<span class="source-line-no">137</span><span id="line-137"></span>
<span class="source-line-no">138</span><span id="line-138"> private static final class AMForTest extends AssignmentManager {</span>
<span class="source-line-no">139</span><span id="line-139"></span>
<span class="source-line-no">140</span><span id="line-140"> public AMForTest(MasterServices master, MasterRegion masterRegion) {</span>
<span class="source-line-no">141</span><span id="line-141"> super(master, masterRegion);</span>
<span class="source-line-no">142</span><span id="line-142"> }</span>
<span class="source-line-no">143</span><span id="line-143"></span>
<span class="source-line-no">144</span><span id="line-144"> @Override</span>
<span class="source-line-no">145</span><span id="line-145"> public ReportRegionStateTransitionResponse reportRegionStateTransition(</span>
<span class="source-line-no">146</span><span id="line-146"> ReportRegionStateTransitionRequest req) throws PleaseHoldException {</span>
<span class="source-line-no">147</span><span id="line-147"> RegionStateTransition rst = req.getTransition(0);</span>
<span class="source-line-no">148</span><span id="line-148"> if (</span>
<span class="source-line-no">149</span><span id="line-149"> rst.getTransitionCode() == TransitionCode.OPENED</span>
<span class="source-line-no">150</span><span id="line-150"> &amp;&amp; ProtobufUtil.toTableName(rst.getRegionInfo(0).getTableName()).equals(NAME)</span>
<span class="source-line-no">151</span><span id="line-151"> ) {</span>
<span class="source-line-no">152</span><span id="line-152"> CountDownLatch arrive = ARRIVE_REPORT;</span>
<span class="source-line-no">153</span><span id="line-153"> if (ARRIVE_REPORT != null) {</span>
<span class="source-line-no">154</span><span id="line-154"> ARRIVE_REPORT = null;</span>
<span class="source-line-no">155</span><span id="line-155"> arrive.countDown();</span>
<span class="source-line-no">156</span><span id="line-156"> // so we will choose another rs next time</span>
<span class="source-line-no">157</span><span id="line-157"> EXCLUDE_SERVERS.add(ProtobufUtil.toServerName(req.getServer()));</span>
<span class="source-line-no">158</span><span id="line-158"> try {</span>
<span class="source-line-no">159</span><span id="line-159"> RESUME_REPORT.await();</span>
<span class="source-line-no">160</span><span id="line-160"> } catch (InterruptedException e) {</span>
<span class="source-line-no">161</span><span id="line-161"> throw new RuntimeException();</span>
<span class="source-line-no">162</span><span id="line-162"> }</span>
<span class="source-line-no">163</span><span id="line-163"> }</span>
<span class="source-line-no">164</span><span id="line-164"> }</span>
<span class="source-line-no">165</span><span id="line-165"> return super.reportRegionStateTransition(req);</span>
<span class="source-line-no">166</span><span id="line-166"> }</span>
<span class="source-line-no">167</span><span id="line-167"> }</span>
<span class="source-line-no">168</span><span id="line-168"></span>
<span class="source-line-no">169</span><span id="line-169"> private static final class SMForTest extends ServerManager {</span>
<span class="source-line-no">170</span><span id="line-170"></span>
<span class="source-line-no">171</span><span id="line-171"> public SMForTest(MasterServices master, RegionServerList storage) {</span>
<span class="source-line-no">172</span><span id="line-172"> super(master, storage);</span>
<span class="source-line-no">173</span><span id="line-173"> }</span>
<span class="source-line-no">174</span><span id="line-174"></span>
<span class="source-line-no">175</span><span id="line-175"> @Override</span>
<span class="source-line-no">176</span><span id="line-176"> public boolean isServerOnline(ServerName serverName) {</span>
<span class="source-line-no">177</span><span id="line-177"> ServerName toKill = SERVER_TO_KILL;</span>
<span class="source-line-no">178</span><span id="line-178"> if (toKill != null &amp;&amp; toKill.equals(serverName)) {</span>
<span class="source-line-no">179</span><span id="line-179"> for (StackTraceElement ele : new Exception().getStackTrace()) {</span>
<span class="source-line-no">180</span><span id="line-180"> // halt it is called from RSProcedureDispatcher, to delay the remoteCallFailed.</span>
<span class="source-line-no">181</span><span id="line-181"> if ("scheduleForRetry".equals(ele.getMethodName())) {</span>
<span class="source-line-no">182</span><span id="line-182"> if (RESUME_IS_SERVER_ONLINE != null) {</span>
<span class="source-line-no">183</span><span id="line-183"> try {</span>
<span class="source-line-no">184</span><span id="line-184"> RESUME_IS_SERVER_ONLINE.await();</span>
<span class="source-line-no">185</span><span id="line-185"> } catch (InterruptedException e) {</span>
<span class="source-line-no">186</span><span id="line-186"> throw new RuntimeException(e);</span>
<span class="source-line-no">187</span><span id="line-187"> }</span>
<span class="source-line-no">188</span><span id="line-188"> }</span>
<span class="source-line-no">189</span><span id="line-189"> break;</span>
<span class="source-line-no">190</span><span id="line-190"> }</span>
<span class="source-line-no">191</span><span id="line-191"> }</span>
<span class="source-line-no">192</span><span id="line-192"> }</span>
<span class="source-line-no">193</span><span id="line-193"> return super.isServerOnline(serverName);</span>
<span class="source-line-no">194</span><span id="line-194"> }</span>
<span class="source-line-no">195</span><span id="line-195"></span>
<span class="source-line-no">196</span><span id="line-196"> @Override</span>
<span class="source-line-no">197</span><span id="line-197"> public List&lt;ServerName&gt; createDestinationServersList() {</span>
<span class="source-line-no">198</span><span id="line-198"> return super.createDestinationServersList(EXCLUDE_SERVERS);</span>
<span class="source-line-no">199</span><span id="line-199"> }</span>
<span class="source-line-no">200</span><span id="line-200"> }</span>
<span class="source-line-no">201</span><span id="line-201"></span>
<span class="source-line-no">202</span><span id="line-202"> public static final class HMasterForTest extends HMaster {</span>
<span class="source-line-no">203</span><span id="line-203"></span>
<span class="source-line-no">204</span><span id="line-204"> public HMasterForTest(Configuration conf) throws IOException {</span>
<span class="source-line-no">205</span><span id="line-205"> super(conf);</span>
<span class="source-line-no">206</span><span id="line-206"> }</span>
<span class="source-line-no">207</span><span id="line-207"></span>
<span class="source-line-no">208</span><span id="line-208"> @Override</span>
<span class="source-line-no">209</span><span id="line-209"> protected AssignmentManager createAssignmentManager(MasterServices master,</span>
<span class="source-line-no">210</span><span id="line-210"> MasterRegion masterRegion) {</span>
<span class="source-line-no">211</span><span id="line-211"> return new AMForTest(master, masterRegion);</span>
<span class="source-line-no">212</span><span id="line-212"> }</span>
<span class="source-line-no">213</span><span id="line-213"></span>
<span class="source-line-no">214</span><span id="line-214"> @Override</span>
<span class="source-line-no">215</span><span id="line-215"> protected ServerManager createServerManager(MasterServices master, RegionServerList storage)</span>
<span class="source-line-no">216</span><span id="line-216"> throws IOException {</span>
<span class="source-line-no">217</span><span id="line-217"> setupClusterConnection();</span>
<span class="source-line-no">218</span><span id="line-218"> return new SMForTest(master, storage);</span>
<span class="source-line-no">219</span><span id="line-219"> }</span>
<span class="source-line-no">220</span><span id="line-220"> }</span>
<span class="source-line-no">221</span><span id="line-221"></span>
<span class="source-line-no">222</span><span id="line-222"> @BeforeClass</span>
<span class="source-line-no">223</span><span id="line-223"> public static void setUp() throws Exception {</span>
<span class="source-line-no">224</span><span id="line-224"> UTIL.startMiniCluster(StartTestingClusterOption.builder().numMasters(1)</span>
<span class="source-line-no">225</span><span id="line-225"> .masterClass(HMasterForTest.class).numRegionServers(3).rsClass(RSForTest.class).build());</span>
<span class="source-line-no">226</span><span id="line-226"> UTIL.createTable(NAME, CF);</span>
<span class="source-line-no">227</span><span id="line-227"> // Here the test region must not be hosted on the same rs with meta region.</span>
<span class="source-line-no">228</span><span id="line-228"> // We have 3 RSes and only two regions(meta and the test region), so they will not likely to be</span>
<span class="source-line-no">229</span><span id="line-229"> // hosted on the same RS.</span>
<span class="source-line-no">230</span><span id="line-230"> UTIL.waitTableAvailable(NAME);</span>
<span class="source-line-no">231</span><span id="line-231"> UTIL.getAdmin().balancerSwitch(false, true);</span>
<span class="source-line-no">232</span><span id="line-232"> }</span>
<span class="source-line-no">233</span><span id="line-233"></span>
<span class="source-line-no">234</span><span id="line-234"> @AfterClass</span>
<span class="source-line-no">235</span><span id="line-235"> public static void tearDown() throws Exception {</span>
<span class="source-line-no">236</span><span id="line-236"> UTIL.shutdownMiniCluster();</span>
<span class="source-line-no">237</span><span id="line-237"> }</span>
<span class="source-line-no">238</span><span id="line-238"></span>
<span class="source-line-no">239</span><span id="line-239"> @SuppressWarnings("FutureReturnValueIgnored")</span>
<span class="source-line-no">240</span><span id="line-240"> @Test</span>
<span class="source-line-no">241</span><span id="line-241"> public void test() throws Exception {</span>
<span class="source-line-no">242</span><span id="line-242"> RegionInfo region = UTIL.getMiniHBaseCluster().getRegions(NAME).get(0).getRegionInfo();</span>
<span class="source-line-no">243</span><span id="line-243"> AssignmentManager am = UTIL.getMiniHBaseCluster().getMaster().getAssignmentManager();</span>
<span class="source-line-no">244</span><span id="line-244"> RegionStateNode rsn = am.getRegionStates().getRegionStateNode(region);</span>
<span class="source-line-no">245</span><span id="line-245"></span>
<span class="source-line-no">246</span><span id="line-246"> ServerName sn = rsn.getRegionLocation();</span>
<span class="source-line-no">247</span><span id="line-247"> RESUME_EXEC_PROC = new CountDownLatch(1);</span>
<span class="source-line-no">248</span><span id="line-248"> ARRIVE_EXEC_PROC = new CountDownLatch(1);</span>
<span class="source-line-no">249</span><span id="line-249"> RESUME_IS_SERVER_ONLINE = new CountDownLatch(1);</span>
<span class="source-line-no">250</span><span id="line-250"></span>
<span class="source-line-no">251</span><span id="line-251"> // reopen the region, and halt the executeProcedures method at RS side</span>
<span class="source-line-no">252</span><span id="line-252"> am.moveAsync(new RegionPlan(region, sn, sn));</span>
<span class="source-line-no">253</span><span id="line-253"> ARRIVE_EXEC_PROC.await();</span>
<span class="source-line-no">254</span><span id="line-254"></span>
<span class="source-line-no">255</span><span id="line-255"> RESUME_REPORT = new CountDownLatch(1);</span>
<span class="source-line-no">256</span><span id="line-256"> ARRIVE_REPORT = new CountDownLatch(1);</span>
<span class="source-line-no">257</span><span id="line-257"></span>
<span class="source-line-no">258</span><span id="line-258"> // kill the region server</span>
<span class="source-line-no">259</span><span id="line-259"> ServerName serverToKill = SERVER_TO_KILL;</span>
<span class="source-line-no">260</span><span id="line-260"> UTIL.getMiniHBaseCluster().stopRegionServer(serverToKill);</span>
<span class="source-line-no">261</span><span id="line-261"> RESUME_EXEC_PROC.countDown();</span>
<span class="source-line-no">262</span><span id="line-262"></span>
<span class="source-line-no">263</span><span id="line-263"> // wait until we are going to open the region on a new rs</span>
<span class="source-line-no">264</span><span id="line-264"> ARRIVE_REPORT.await();</span>
<span class="source-line-no">265</span><span id="line-265"></span>
<span class="source-line-no">266</span><span id="line-266"> // resume the isServerOnline check, to let the rs procedure</span>
<span class="source-line-no">267</span><span id="line-267"> RESUME_IS_SERVER_ONLINE.countDown();</span>
<span class="source-line-no">268</span><span id="line-268"></span>
<span class="source-line-no">269</span><span id="line-269"> // before HBASE-20811 the state could become OPEN, and this is why later the region will be</span>
<span class="source-line-no">270</span><span id="line-270"> // assigned to two regionservers.</span>
<span class="source-line-no">271</span><span id="line-271"> for (int i = 0; i &lt; 15; i++) {</span>
<span class="source-line-no">272</span><span id="line-272"> if (rsn.getState() == RegionState.State.OPEN) {</span>
<span class="source-line-no">273</span><span id="line-273"> break;</span>
<span class="source-line-no">274</span><span id="line-274"> }</span>
<span class="source-line-no">275</span><span id="line-275"> Thread.sleep(1000);</span>
<span class="source-line-no">276</span><span id="line-276"> }</span>
<span class="source-line-no">277</span><span id="line-277"></span>
<span class="source-line-no">278</span><span id="line-278"> // resume the old report</span>
<span class="source-line-no">279</span><span id="line-279"> RESUME_REPORT.countDown();</span>
<span class="source-line-no">280</span><span id="line-280"></span>
<span class="source-line-no">281</span><span id="line-281"> // wait a bit to let the region to be online, it is not easy to write a condition for this so</span>
<span class="source-line-no">282</span><span id="line-282"> // just sleep a while.</span>
<span class="source-line-no">283</span><span id="line-283"> Thread.sleep(10000);</span>
<span class="source-line-no">284</span><span id="line-284"></span>
<span class="source-line-no">285</span><span id="line-285"> // confirm that the region is only on one rs</span>
<span class="source-line-no">286</span><span id="line-286"> int count = 0;</span>
<span class="source-line-no">287</span><span id="line-287"> for (RegionServerThread t : UTIL.getMiniHBaseCluster().getRegionServerThreads()) {</span>
<span class="source-line-no">288</span><span id="line-288"> if (!t.getRegionServer().getRegions(NAME).isEmpty()) {</span>
<span class="source-line-no">289</span><span id="line-289"> LOG.info("{} is on {}", region, t.getRegionServer().getServerName());</span>
<span class="source-line-no">290</span><span id="line-290"> count++;</span>
<span class="source-line-no">291</span><span id="line-291"> }</span>
<span class="source-line-no">292</span><span id="line-292"> }</span>
<span class="source-line-no">293</span><span id="line-293"> assertEquals(1, count);</span>
<span class="source-line-no">294</span><span id="line-294"> }</span>
<span class="source-line-no">295</span><span id="line-295">}</span>
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