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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.replication;</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.ArrayList;</span>
<span class="source-line-no">022</span><span id="line-22">import java.util.List;</span>
<span class="source-line-no">023</span><span id="line-23">import java.util.NavigableMap;</span>
<span class="source-line-no">024</span><span id="line-24">import java.util.TreeMap;</span>
<span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.fs.Path;</span>
<span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.HBaseClassTestRule;</span>
<span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.HConstants;</span>
<span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.KeyValue;</span>
<span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.Waiter;</span>
<span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.RegionInfo;</span>
<span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.client.RegionInfoBuilder;</span>
<span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.regionserver.HRegionServer;</span>
<span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl;</span>
<span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL;</span>
<span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.replication.regionserver.Replication;</span>
<span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.replication.regionserver.ReplicationSource;</span>
<span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.replication.regionserver.ReplicationSourceInterface;</span>
<span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.testclassification.LargeTests;</span>
<span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.testclassification.ReplicationTests;</span>
<span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.util.Bytes;</span>
<span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span>
<span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.wal.AbstractFSWALProvider;</span>
<span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.wal.WAL;</span>
<span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.wal.WALEdit;</span>
<span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.hbase.wal.WALEditInternalHelper;</span>
<span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.hbase.wal.WALKeyImpl;</span>
<span class="source-line-no">047</span><span id="line-47">import org.junit.Assert;</span>
<span class="source-line-no">048</span><span id="line-48">import org.junit.Before;</span>
<span class="source-line-no">049</span><span id="line-49">import org.junit.ClassRule;</span>
<span class="source-line-no">050</span><span id="line-50">import org.junit.Test;</span>
<span class="source-line-no">051</span><span id="line-51">import org.junit.experimental.categories.Category;</span>
<span class="source-line-no">052</span><span id="line-52"></span>
<span class="source-line-no">053</span><span id="line-53">@Category({ ReplicationTests.class, LargeTests.class })</span>
<span class="source-line-no">054</span><span id="line-54">public class TestReplicationEmptyWALRecovery extends TestReplicationBase {</span>
<span class="source-line-no">055</span><span id="line-55"> MultiVersionConcurrencyControl mvcc = new MultiVersionConcurrencyControl();</span>
<span class="source-line-no">056</span><span id="line-56"> static final RegionInfo info = RegionInfoBuilder.newBuilder(tableName).build();</span>
<span class="source-line-no">057</span><span id="line-57"> NavigableMap&lt;byte[], Integer&gt; scopes = new TreeMap&lt;&gt;(Bytes.BYTES_COMPARATOR);</span>
<span class="source-line-no">058</span><span id="line-58"></span>
<span class="source-line-no">059</span><span id="line-59"> @ClassRule</span>
<span class="source-line-no">060</span><span id="line-60"> public static final HBaseClassTestRule CLASS_RULE =</span>
<span class="source-line-no">061</span><span id="line-61"> HBaseClassTestRule.forClass(TestReplicationEmptyWALRecovery.class);</span>
<span class="source-line-no">062</span><span id="line-62"></span>
<span class="source-line-no">063</span><span id="line-63"> @Before</span>
<span class="source-line-no">064</span><span id="line-64"> public void setUp() throws IOException, InterruptedException {</span>
<span class="source-line-no">065</span><span id="line-65"> cleanUp();</span>
<span class="source-line-no">066</span><span id="line-66"> scopes.put(famName, HConstants.REPLICATION_SCOPE_GLOBAL);</span>
<span class="source-line-no">067</span><span id="line-67"> replicateCount.set(0);</span>
<span class="source-line-no">068</span><span id="line-68"> replicatedEntries.clear();</span>
<span class="source-line-no">069</span><span id="line-69"> }</span>
<span class="source-line-no">070</span><span id="line-70"></span>
<span class="source-line-no">071</span><span id="line-71"> /**</span>
<span class="source-line-no">072</span><span id="line-72"> * Waits until there is only one log(the current writing one) in the replication queue</span>
<span class="source-line-no">073</span><span id="line-73"> * @param numRs number of region servers</span>
<span class="source-line-no">074</span><span id="line-74"> */</span>
<span class="source-line-no">075</span><span id="line-75"> private void waitForLogAdvance(int numRs) {</span>
<span class="source-line-no">076</span><span id="line-76"> Waiter.waitFor(CONF1, 100000, new Waiter.Predicate&lt;Exception&gt;() {</span>
<span class="source-line-no">077</span><span id="line-77"> @Override</span>
<span class="source-line-no">078</span><span id="line-78"> public boolean evaluate() throws Exception {</span>
<span class="source-line-no">079</span><span id="line-79"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">080</span><span id="line-80"> HRegionServer hrs = UTIL1.getHBaseCluster().getRegionServer(i);</span>
<span class="source-line-no">081</span><span id="line-81"> RegionInfo regionInfo =</span>
<span class="source-line-no">082</span><span id="line-82"> UTIL1.getHBaseCluster().getRegions(htable1.getName()).get(0).getRegionInfo();</span>
<span class="source-line-no">083</span><span id="line-83"> WAL wal = hrs.getWAL(regionInfo);</span>
<span class="source-line-no">084</span><span id="line-84"> Path currentFile = ((AbstractFSWAL&lt;?&gt;) wal).getCurrentFileName();</span>
<span class="source-line-no">085</span><span id="line-85"> Replication replicationService =</span>
<span class="source-line-no">086</span><span id="line-86"> (Replication) UTIL1.getHBaseCluster().getRegionServer(i).getReplicationSourceService();</span>
<span class="source-line-no">087</span><span id="line-87"> for (ReplicationSourceInterface rsi : replicationService.getReplicationManager()</span>
<span class="source-line-no">088</span><span id="line-88"> .getSources()) {</span>
<span class="source-line-no">089</span><span id="line-89"> ReplicationSource source = (ReplicationSource) rsi;</span>
<span class="source-line-no">090</span><span id="line-90"> // We are making sure that there is only one log queue and that is for the</span>
<span class="source-line-no">091</span><span id="line-91"> // current WAL of region server</span>
<span class="source-line-no">092</span><span id="line-92"> String logPrefix = source.getQueues().keySet().stream().findFirst().get();</span>
<span class="source-line-no">093</span><span id="line-93"> if (</span>
<span class="source-line-no">094</span><span id="line-94"> !currentFile.equals(source.getCurrentPath())</span>
<span class="source-line-no">095</span><span id="line-95"> || source.getQueues().keySet().size() != 1</span>
<span class="source-line-no">096</span><span id="line-96"> || source.getQueues().get(logPrefix).size() != 1</span>
<span class="source-line-no">097</span><span id="line-97"> ) {</span>
<span class="source-line-no">098</span><span id="line-98"> return false;</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"> }</span>
<span class="source-line-no">102</span><span id="line-102"> return true;</span>
<span class="source-line-no">103</span><span id="line-103"> }</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"></span>
<span class="source-line-no">107</span><span id="line-107"> private void verifyNumberOfLogsInQueue(int numQueues, int numRs) {</span>
<span class="source-line-no">108</span><span id="line-108"> Waiter.waitFor(CONF1, 10000, new Waiter.Predicate&lt;Exception&gt;() {</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"> public boolean evaluate() {</span>
<span class="source-line-no">111</span><span id="line-111"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">112</span><span id="line-112"> Replication replicationService =</span>
<span class="source-line-no">113</span><span id="line-113"> (Replication) UTIL1.getHBaseCluster().getRegionServer(i).getReplicationSourceService();</span>
<span class="source-line-no">114</span><span id="line-114"> for (ReplicationSourceInterface rsi : replicationService.getReplicationManager()</span>
<span class="source-line-no">115</span><span id="line-115"> .getSources()) {</span>
<span class="source-line-no">116</span><span id="line-116"> ReplicationSource source = (ReplicationSource) rsi;</span>
<span class="source-line-no">117</span><span id="line-117"> String logPrefix = source.getQueues().keySet().stream().findFirst().get();</span>
<span class="source-line-no">118</span><span id="line-118"> if (source.getQueues().get(logPrefix).size() != numQueues) {</span>
<span class="source-line-no">119</span><span id="line-119"> return false;</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"> }</span>
<span class="source-line-no">123</span><span id="line-123"> return true;</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"> }</span>
<span class="source-line-no">127</span><span id="line-127"></span>
<span class="source-line-no">128</span><span id="line-128"> @Test</span>
<span class="source-line-no">129</span><span id="line-129"> public void testEmptyWALRecovery() throws Exception {</span>
<span class="source-line-no">130</span><span id="line-130"> final int numRs = UTIL1.getHBaseCluster().getRegionServerThreads().size();</span>
<span class="source-line-no">131</span><span id="line-131"> // for each RS, create an empty wal with same walGroupId</span>
<span class="source-line-no">132</span><span id="line-132"> final List&lt;Path&gt; emptyWalPaths = new ArrayList&lt;&gt;();</span>
<span class="source-line-no">133</span><span id="line-133"> long ts = EnvironmentEdgeManager.currentTime();</span>
<span class="source-line-no">134</span><span id="line-134"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">135</span><span id="line-135"> RegionInfo regionInfo =</span>
<span class="source-line-no">136</span><span id="line-136"> UTIL1.getHBaseCluster().getRegions(htable1.getName()).get(0).getRegionInfo();</span>
<span class="source-line-no">137</span><span id="line-137"> WAL wal = UTIL1.getHBaseCluster().getRegionServer(i).getWAL(regionInfo);</span>
<span class="source-line-no">138</span><span id="line-138"> Path currentWalPath = AbstractFSWALProvider.getCurrentFileName(wal);</span>
<span class="source-line-no">139</span><span id="line-139"> String walGroupId = AbstractFSWALProvider.getWALPrefixFromWALName(currentWalPath.getName());</span>
<span class="source-line-no">140</span><span id="line-140"> Path emptyWalPath = new Path(UTIL1.getDataTestDir(), walGroupId + "." + ts);</span>
<span class="source-line-no">141</span><span id="line-141"> UTIL1.getTestFileSystem().create(emptyWalPath).close();</span>
<span class="source-line-no">142</span><span id="line-142"> emptyWalPaths.add(emptyWalPath);</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"> injectEmptyWAL(numRs, emptyWalPaths);</span>
<span class="source-line-no">146</span><span id="line-146"></span>
<span class="source-line-no">147</span><span id="line-147"> // ReplicationSource should advance past the empty wal, or else the test will fail</span>
<span class="source-line-no">148</span><span id="line-148"> waitForLogAdvance(numRs);</span>
<span class="source-line-no">149</span><span id="line-149"> verifyNumberOfLogsInQueue(1, numRs);</span>
<span class="source-line-no">150</span><span id="line-150"> // we're now writing to the new wal</span>
<span class="source-line-no">151</span><span id="line-151"> // if everything works, the source should've stopped reading from the empty wal, and start</span>
<span class="source-line-no">152</span><span id="line-152"> // replicating from the new wal</span>
<span class="source-line-no">153</span><span id="line-153"> runSimplePutDeleteTest();</span>
<span class="source-line-no">154</span><span id="line-154"> rollWalsAndWaitForDeque(numRs);</span>
<span class="source-line-no">155</span><span id="line-155"> }</span>
<span class="source-line-no">156</span><span id="line-156"></span>
<span class="source-line-no">157</span><span id="line-157"> /**</span>
<span class="source-line-no">158</span><span id="line-158"> * Test empty WAL along with non empty WALs in the same batch. This test is to make sure when we</span>
<span class="source-line-no">159</span><span id="line-159"> * see the empty and handle the EOF exception, we are able to ship the previous batch of entries</span>
<span class="source-line-no">160</span><span id="line-160"> * without loosing it. This test also tests the number of batches shipped</span>
<span class="source-line-no">161</span><span id="line-161"> * @throws Exception throws any exception</span>
<span class="source-line-no">162</span><span id="line-162"> */</span>
<span class="source-line-no">163</span><span id="line-163"> @Test</span>
<span class="source-line-no">164</span><span id="line-164"> public void testReplicationOfEmptyWALFollowingNonEmptyWAL() throws Exception {</span>
<span class="source-line-no">165</span><span id="line-165"> final int numRs = UTIL1.getHBaseCluster().getRegionServerThreads().size();</span>
<span class="source-line-no">166</span><span id="line-166"> // make sure we only the current active wal file in queue</span>
<span class="source-line-no">167</span><span id="line-167"> verifyNumberOfLogsInQueue(1, numRs);</span>
<span class="source-line-no">168</span><span id="line-168"></span>
<span class="source-line-no">169</span><span id="line-169"> // Disable the replication peer to accumulate the non empty WAL followed by empty WAL</span>
<span class="source-line-no">170</span><span id="line-170"> hbaseAdmin.disableReplicationPeer(PEER_ID2);</span>
<span class="source-line-no">171</span><span id="line-171"></span>
<span class="source-line-no">172</span><span id="line-172"> int numOfEntriesToReplicate = 20;</span>
<span class="source-line-no">173</span><span id="line-173"> // for each RS, create an empty wal with same walGroupId</span>
<span class="source-line-no">174</span><span id="line-174"> final List&lt;Path&gt; emptyWalPaths = new ArrayList&lt;&gt;();</span>
<span class="source-line-no">175</span><span id="line-175"> long ts = EnvironmentEdgeManager.currentTime();</span>
<span class="source-line-no">176</span><span id="line-176"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">177</span><span id="line-177"> RegionInfo regionInfo =</span>
<span class="source-line-no">178</span><span id="line-178"> UTIL1.getHBaseCluster().getRegions(tableName.getName()).get(0).getRegionInfo();</span>
<span class="source-line-no">179</span><span id="line-179"> WAL wal = UTIL1.getHBaseCluster().getRegionServer(i).getWAL(regionInfo);</span>
<span class="source-line-no">180</span><span id="line-180"> Path currentWalPath = AbstractFSWALProvider.getCurrentFileName(wal);</span>
<span class="source-line-no">181</span><span id="line-181"></span>
<span class="source-line-no">182</span><span id="line-182"> appendEntriesToWal(numOfEntriesToReplicate, wal);</span>
<span class="source-line-no">183</span><span id="line-183"> String walGroupId = AbstractFSWALProvider.getWALPrefixFromWALName(currentWalPath.getName());</span>
<span class="source-line-no">184</span><span id="line-184"> Path emptyWalPath = new Path(UTIL1.getDefaultRootDirPath(), walGroupId + "." + ts);</span>
<span class="source-line-no">185</span><span id="line-185"> UTIL1.getTestFileSystem().create(emptyWalPath).close();</span>
<span class="source-line-no">186</span><span id="line-186"> emptyWalPaths.add(emptyWalPath);</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"> injectEmptyWAL(numRs, emptyWalPaths);</span>
<span class="source-line-no">190</span><span id="line-190"> // There should be three WALs in queue</span>
<span class="source-line-no">191</span><span id="line-191"> // 1. non empty WAL</span>
<span class="source-line-no">192</span><span id="line-192"> // 2. empty WAL</span>
<span class="source-line-no">193</span><span id="line-193"> // 3. live WAL</span>
<span class="source-line-no">194</span><span id="line-194"> verifyNumberOfLogsInQueue(3, numRs);</span>
<span class="source-line-no">195</span><span id="line-195"> hbaseAdmin.enableReplicationPeer(PEER_ID2);</span>
<span class="source-line-no">196</span><span id="line-196"> // ReplicationSource should advance past the empty wal, or else the test will fail</span>
<span class="source-line-no">197</span><span id="line-197"> waitForLogAdvance(numRs);</span>
<span class="source-line-no">198</span><span id="line-198"></span>
<span class="source-line-no">199</span><span id="line-199"> // Now we should expect numOfEntriesToReplicate entries</span>
<span class="source-line-no">200</span><span id="line-200"> // replicated from each region server. This makes sure we didn't loose data</span>
<span class="source-line-no">201</span><span id="line-201"> // from any previous batch when we encounter EOF exception for empty file.</span>
<span class="source-line-no">202</span><span id="line-202"> Assert.assertEquals("Replicated entries are not correct", numOfEntriesToReplicate * numRs,</span>
<span class="source-line-no">203</span><span id="line-203"> replicatedEntries.size());</span>
<span class="source-line-no">204</span><span id="line-204"></span>
<span class="source-line-no">205</span><span id="line-205"> // We expect just one batch of replication which will</span>
<span class="source-line-no">206</span><span id="line-206"> // be from when we handle the EOF exception.</span>
<span class="source-line-no">207</span><span id="line-207"> Assert.assertEquals("Replicated batches are not correct", 1, replicateCount.intValue());</span>
<span class="source-line-no">208</span><span id="line-208"> verifyNumberOfLogsInQueue(1, numRs);</span>
<span class="source-line-no">209</span><span id="line-209"> // we're now writing to the new wal</span>
<span class="source-line-no">210</span><span id="line-210"> // if everything works, the source should've stopped reading from the empty wal, and start</span>
<span class="source-line-no">211</span><span id="line-211"> // replicating from the new wal</span>
<span class="source-line-no">212</span><span id="line-212"> runSimplePutDeleteTest();</span>
<span class="source-line-no">213</span><span id="line-213"> rollWalsAndWaitForDeque(numRs);</span>
<span class="source-line-no">214</span><span id="line-214"> }</span>
<span class="source-line-no">215</span><span id="line-215"></span>
<span class="source-line-no">216</span><span id="line-216"> /**</span>
<span class="source-line-no">217</span><span id="line-217"> * Test empty WAL along with non empty WALs in the same batch. This test is to make sure when we</span>
<span class="source-line-no">218</span><span id="line-218"> * see the empty WAL and handle the EOF exception, we are able to proceed with next batch and</span>
<span class="source-line-no">219</span><span id="line-219"> * replicate it properly without missing data.</span>
<span class="source-line-no">220</span><span id="line-220"> * @throws Exception throws any exception</span>
<span class="source-line-no">221</span><span id="line-221"> */</span>
<span class="source-line-no">222</span><span id="line-222"> @Test</span>
<span class="source-line-no">223</span><span id="line-223"> public void testReplicationOfEmptyWALFollowedByNonEmptyWAL() throws Exception {</span>
<span class="source-line-no">224</span><span id="line-224"> // Disable the replication peer to accumulate the non empty WAL followed by empty WAL</span>
<span class="source-line-no">225</span><span id="line-225"> hbaseAdmin.disableReplicationPeer(PEER_ID2);</span>
<span class="source-line-no">226</span><span id="line-226"> int numOfEntriesToReplicate = 20;</span>
<span class="source-line-no">227</span><span id="line-227"></span>
<span class="source-line-no">228</span><span id="line-228"> final int numRs = UTIL1.getHBaseCluster().getRegionServerThreads().size();</span>
<span class="source-line-no">229</span><span id="line-229"> // for each RS, create an empty wal with same walGroupId</span>
<span class="source-line-no">230</span><span id="line-230"> final List&lt;Path&gt; emptyWalPaths = new ArrayList&lt;&gt;();</span>
<span class="source-line-no">231</span><span id="line-231"> long ts = EnvironmentEdgeManager.currentTime();</span>
<span class="source-line-no">232</span><span id="line-232"> WAL wal = null;</span>
<span class="source-line-no">233</span><span id="line-233"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">234</span><span id="line-234"> RegionInfo regionInfo =</span>
<span class="source-line-no">235</span><span id="line-235"> UTIL1.getHBaseCluster().getRegions(tableName.getName()).get(0).getRegionInfo();</span>
<span class="source-line-no">236</span><span id="line-236"> wal = UTIL1.getHBaseCluster().getRegionServer(i).getWAL(regionInfo);</span>
<span class="source-line-no">237</span><span id="line-237"> Path currentWalPath = AbstractFSWALProvider.getCurrentFileName(wal);</span>
<span class="source-line-no">238</span><span id="line-238"> appendEntriesToWal(numOfEntriesToReplicate, wal);</span>
<span class="source-line-no">239</span><span id="line-239"> String walGroupId = AbstractFSWALProvider.getWALPrefixFromWALName(currentWalPath.getName());</span>
<span class="source-line-no">240</span><span id="line-240"> Path emptyWalPath = new Path(UTIL1.getDataTestDir(), walGroupId + "." + ts);</span>
<span class="source-line-no">241</span><span id="line-241"> UTIL1.getTestFileSystem().create(emptyWalPath).close();</span>
<span class="source-line-no">242</span><span id="line-242"> emptyWalPaths.add(emptyWalPath);</span>
<span class="source-line-no">243</span><span id="line-243"></span>
<span class="source-line-no">244</span><span id="line-244"> }</span>
<span class="source-line-no">245</span><span id="line-245"> injectEmptyWAL(numRs, emptyWalPaths);</span>
<span class="source-line-no">246</span><span id="line-246"> // roll the WAL now</span>
<span class="source-line-no">247</span><span id="line-247"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">248</span><span id="line-248"> wal.rollWriter();</span>
<span class="source-line-no">249</span><span id="line-249"> }</span>
<span class="source-line-no">250</span><span id="line-250"> hbaseAdmin.enableReplicationPeer(PEER_ID2);</span>
<span class="source-line-no">251</span><span id="line-251"> // ReplicationSource should advance past the empty wal, or else the test will fail</span>
<span class="source-line-no">252</span><span id="line-252"> waitForLogAdvance(numRs);</span>
<span class="source-line-no">253</span><span id="line-253"></span>
<span class="source-line-no">254</span><span id="line-254"> // Now we should expect numOfEntriesToReplicate entries</span>
<span class="source-line-no">255</span><span id="line-255"> // replicated from each region server. This makes sure we didn't loose data</span>
<span class="source-line-no">256</span><span id="line-256"> // from any previous batch when we encounter EOF exception for empty file.</span>
<span class="source-line-no">257</span><span id="line-257"> Assert.assertEquals("Replicated entries are not correct", numOfEntriesToReplicate * numRs,</span>
<span class="source-line-no">258</span><span id="line-258"> replicatedEntries.size());</span>
<span class="source-line-no">259</span><span id="line-259"></span>
<span class="source-line-no">260</span><span id="line-260"> // We expect just one batch of replication to be shipped which will</span>
<span class="source-line-no">261</span><span id="line-261"> // for non empty WAL</span>
<span class="source-line-no">262</span><span id="line-262"> Assert.assertEquals("Replicated batches are not correct", 1, replicateCount.get());</span>
<span class="source-line-no">263</span><span id="line-263"> verifyNumberOfLogsInQueue(1, numRs);</span>
<span class="source-line-no">264</span><span id="line-264"> // we're now writing to the new wal</span>
<span class="source-line-no">265</span><span id="line-265"> // if everything works, the source should've stopped reading from the empty wal, and start</span>
<span class="source-line-no">266</span><span id="line-266"> // replicating from the new wal</span>
<span class="source-line-no">267</span><span id="line-267"> runSimplePutDeleteTest();</span>
<span class="source-line-no">268</span><span id="line-268"> rollWalsAndWaitForDeque(numRs);</span>
<span class="source-line-no">269</span><span id="line-269"> }</span>
<span class="source-line-no">270</span><span id="line-270"></span>
<span class="source-line-no">271</span><span id="line-271"> /**</span>
<span class="source-line-no">272</span><span id="line-272"> * This test make sure we replicate all the enties from the non empty WALs which are surrounding</span>
<span class="source-line-no">273</span><span id="line-273"> * the empty WALs</span>
<span class="source-line-no">274</span><span id="line-274"> * @throws Exception throws exception</span>
<span class="source-line-no">275</span><span id="line-275"> */</span>
<span class="source-line-no">276</span><span id="line-276"> @Test</span>
<span class="source-line-no">277</span><span id="line-277"> public void testReplicationOfEmptyWALSurroundedNonEmptyWAL() throws Exception {</span>
<span class="source-line-no">278</span><span id="line-278"> // Disable the replication peer to accumulate the non empty WAL followed by empty WAL</span>
<span class="source-line-no">279</span><span id="line-279"> hbaseAdmin.disableReplicationPeer(PEER_ID2);</span>
<span class="source-line-no">280</span><span id="line-280"> int numOfEntriesToReplicate = 20;</span>
<span class="source-line-no">281</span><span id="line-281"></span>
<span class="source-line-no">282</span><span id="line-282"> final int numRs = UTIL1.getHBaseCluster().getRegionServerThreads().size();</span>
<span class="source-line-no">283</span><span id="line-283"> // for each RS, create an empty wal with same walGroupId</span>
<span class="source-line-no">284</span><span id="line-284"> final List&lt;Path&gt; emptyWalPaths = new ArrayList&lt;&gt;();</span>
<span class="source-line-no">285</span><span id="line-285"> long ts = EnvironmentEdgeManager.currentTime();</span>
<span class="source-line-no">286</span><span id="line-286"> WAL wal = null;</span>
<span class="source-line-no">287</span><span id="line-287"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">288</span><span id="line-288"> RegionInfo regionInfo =</span>
<span class="source-line-no">289</span><span id="line-289"> UTIL1.getHBaseCluster().getRegions(tableName.getName()).get(0).getRegionInfo();</span>
<span class="source-line-no">290</span><span id="line-290"> wal = UTIL1.getHBaseCluster().getRegionServer(i).getWAL(regionInfo);</span>
<span class="source-line-no">291</span><span id="line-291"> Path currentWalPath = AbstractFSWALProvider.getCurrentFileName(wal);</span>
<span class="source-line-no">292</span><span id="line-292"> appendEntriesToWal(numOfEntriesToReplicate, wal);</span>
<span class="source-line-no">293</span><span id="line-293"> wal.rollWriter();</span>
<span class="source-line-no">294</span><span id="line-294"> String walGroupId = AbstractFSWALProvider.getWALPrefixFromWALName(currentWalPath.getName());</span>
<span class="source-line-no">295</span><span id="line-295"> Path emptyWalPath = new Path(UTIL1.getDataTestDir(), walGroupId + "." + ts);</span>
<span class="source-line-no">296</span><span id="line-296"> UTIL1.getTestFileSystem().create(emptyWalPath).close();</span>
<span class="source-line-no">297</span><span id="line-297"> emptyWalPaths.add(emptyWalPath);</span>
<span class="source-line-no">298</span><span id="line-298"> }</span>
<span class="source-line-no">299</span><span id="line-299"> injectEmptyWAL(numRs, emptyWalPaths);</span>
<span class="source-line-no">300</span><span id="line-300"></span>
<span class="source-line-no">301</span><span id="line-301"> // roll the WAL again with some entries</span>
<span class="source-line-no">302</span><span id="line-302"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">303</span><span id="line-303"> appendEntriesToWal(numOfEntriesToReplicate, wal);</span>
<span class="source-line-no">304</span><span id="line-304"> wal.rollWriter();</span>
<span class="source-line-no">305</span><span id="line-305"> }</span>
<span class="source-line-no">306</span><span id="line-306"></span>
<span class="source-line-no">307</span><span id="line-307"> hbaseAdmin.enableReplicationPeer(PEER_ID2);</span>
<span class="source-line-no">308</span><span id="line-308"> // ReplicationSource should advance past the empty wal, or else the test will fail</span>
<span class="source-line-no">309</span><span id="line-309"> waitForLogAdvance(numRs);</span>
<span class="source-line-no">310</span><span id="line-310"></span>
<span class="source-line-no">311</span><span id="line-311"> // Now we should expect numOfEntriesToReplicate entries</span>
<span class="source-line-no">312</span><span id="line-312"> // replicated from each region server. This makes sure we didn't loose data</span>
<span class="source-line-no">313</span><span id="line-313"> // from any previous batch when we encounter EOF exception for empty file.</span>
<span class="source-line-no">314</span><span id="line-314"> Assert.assertEquals("Replicated entries are not correct", numOfEntriesToReplicate * numRs * 2,</span>
<span class="source-line-no">315</span><span id="line-315"> replicatedEntries.size());</span>
<span class="source-line-no">316</span><span id="line-316"></span>
<span class="source-line-no">317</span><span id="line-317"> // We expect two batch of replication to be shipped which will</span>
<span class="source-line-no">318</span><span id="line-318"> // for non empty WAL</span>
<span class="source-line-no">319</span><span id="line-319"> Assert.assertEquals("Replicated batches are not correct", 2, replicateCount.get());</span>
<span class="source-line-no">320</span><span id="line-320"> verifyNumberOfLogsInQueue(1, numRs);</span>
<span class="source-line-no">321</span><span id="line-321"> // we're now writing to the new wal</span>
<span class="source-line-no">322</span><span id="line-322"> // if everything works, the source should've stopped reading from the empty wal, and start</span>
<span class="source-line-no">323</span><span id="line-323"> // replicating from the new wal</span>
<span class="source-line-no">324</span><span id="line-324"> runSimplePutDeleteTest();</span>
<span class="source-line-no">325</span><span id="line-325"> rollWalsAndWaitForDeque(numRs);</span>
<span class="source-line-no">326</span><span id="line-326"> }</span>
<span class="source-line-no">327</span><span id="line-327"></span>
<span class="source-line-no">328</span><span id="line-328"> // inject our empty wal into the replication queue, and then roll the original wal, which</span>
<span class="source-line-no">329</span><span id="line-329"> // enqueues a new wal behind our empty wal. We must roll the wal here as now we use the WAL to</span>
<span class="source-line-no">330</span><span id="line-330"> // determine if the file being replicated currently is still opened for write, so just inject a</span>
<span class="source-line-no">331</span><span id="line-331"> // new wal to the replication queue does not mean the previous file is closed.</span>
<span class="source-line-no">332</span><span id="line-332"> private void injectEmptyWAL(int numRs, List&lt;Path&gt; emptyWalPaths) throws IOException {</span>
<span class="source-line-no">333</span><span id="line-333"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">334</span><span id="line-334"> HRegionServer hrs = UTIL1.getHBaseCluster().getRegionServer(i);</span>
<span class="source-line-no">335</span><span id="line-335"> Replication replicationService = (Replication) hrs.getReplicationSourceService();</span>
<span class="source-line-no">336</span><span id="line-336"> replicationService.getReplicationManager().postLogRoll(emptyWalPaths.get(i));</span>
<span class="source-line-no">337</span><span id="line-337"> RegionInfo regionInfo =</span>
<span class="source-line-no">338</span><span id="line-338"> UTIL1.getHBaseCluster().getRegions(htable1.getName()).get(0).getRegionInfo();</span>
<span class="source-line-no">339</span><span id="line-339"> WAL wal = hrs.getWAL(regionInfo);</span>
<span class="source-line-no">340</span><span id="line-340"> wal.rollWriter(true);</span>
<span class="source-line-no">341</span><span id="line-341"> }</span>
<span class="source-line-no">342</span><span id="line-342"> }</span>
<span class="source-line-no">343</span><span id="line-343"></span>
<span class="source-line-no">344</span><span id="line-344"> protected WALKeyImpl getWalKeyImpl() {</span>
<span class="source-line-no">345</span><span id="line-345"> return new WALKeyImpl(info.getEncodedNameAsBytes(), tableName, 0, mvcc, scopes);</span>
<span class="source-line-no">346</span><span id="line-346"> }</span>
<span class="source-line-no">347</span><span id="line-347"></span>
<span class="source-line-no">348</span><span id="line-348"> // Roll the WAL and wait for it to get deque from the log queue</span>
<span class="source-line-no">349</span><span id="line-349"> private void rollWalsAndWaitForDeque(int numRs) throws IOException {</span>
<span class="source-line-no">350</span><span id="line-350"> RegionInfo regionInfo =</span>
<span class="source-line-no">351</span><span id="line-351"> UTIL1.getHBaseCluster().getRegions(tableName.getName()).get(0).getRegionInfo();</span>
<span class="source-line-no">352</span><span id="line-352"> for (int i = 0; i &lt; numRs; i++) {</span>
<span class="source-line-no">353</span><span id="line-353"> WAL wal = UTIL1.getHBaseCluster().getRegionServer(i).getWAL(regionInfo);</span>
<span class="source-line-no">354</span><span id="line-354"> wal.rollWriter();</span>
<span class="source-line-no">355</span><span id="line-355"> }</span>
<span class="source-line-no">356</span><span id="line-356"> waitForLogAdvance(numRs);</span>
<span class="source-line-no">357</span><span id="line-357"> }</span>
<span class="source-line-no">358</span><span id="line-358"></span>
<span class="source-line-no">359</span><span id="line-359"> private void appendEntriesToWal(int numEntries, WAL wal) throws IOException {</span>
<span class="source-line-no">360</span><span id="line-360"> long txId = -1;</span>
<span class="source-line-no">361</span><span id="line-361"> for (int i = 0; i &lt; numEntries; i++) {</span>
<span class="source-line-no">362</span><span id="line-362"> byte[] b = Bytes.toBytes(Integer.toString(i));</span>
<span class="source-line-no">363</span><span id="line-363"> KeyValue kv = new KeyValue(b, famName, b);</span>
<span class="source-line-no">364</span><span id="line-364"> WALEdit edit = new WALEdit();</span>
<span class="source-line-no">365</span><span id="line-365"> WALEditInternalHelper.addExtendedCell(edit, kv);</span>
<span class="source-line-no">366</span><span id="line-366"> txId = wal.appendData(info, getWalKeyImpl(), edit);</span>
<span class="source-line-no">367</span><span id="line-367"> }</span>
<span class="source-line-no">368</span><span id="line-368"> wal.sync(txId);</span>
<span class="source-line-no">369</span><span id="line-369"> }</span>
<span class="source-line-no">370</span><span id="line-370">}</span>
</pre>
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