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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.client;</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">import static org.junit.Assert.assertFalse;</span> |
| <span class="source-line-no">022</span><span id="line-22">import static org.junit.Assert.assertTrue;</span> |
| <span class="source-line-no">023</span><span id="line-23"></span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.ArrayList;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.Collections;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.List;</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.HConstants;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.HRegionLocation;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.MetaRegionLocationCache;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.MultithreadedTestUtil;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.ServerName;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.TableName;</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.RegionState;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.security.User;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.testclassification.MasterTests;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.testclassification.SmallTests;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.util.JVMClusterUtil;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.zookeeper.ZKUtil;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.zookeeper.ZKWatcher;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.hbase.zookeeper.ZNodePaths;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.junit.AfterClass;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.junit.BeforeClass;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.junit.ClassRule;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.junit.Test;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.junit.experimental.categories.Category;</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52">import org.apache.hbase.thirdparty.com.google.common.io.Closeables;</span> |
| <span class="source-line-no">053</span><span id="line-53"></span> |
| <span class="source-line-no">054</span><span id="line-54">@Category({ SmallTests.class, MasterTests.class })</span> |
| <span class="source-line-no">055</span><span id="line-55">public class TestMetaRegionLocationCache {</span> |
| <span class="source-line-no">056</span><span id="line-56"> @ClassRule</span> |
| <span class="source-line-no">057</span><span id="line-57"> public static final HBaseClassTestRule CLASS_RULE =</span> |
| <span class="source-line-no">058</span><span id="line-58"> HBaseClassTestRule.forClass(TestMetaRegionLocationCache.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"> private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();</span> |
| <span class="source-line-no">061</span><span id="line-61"> private static ConnectionRegistry REGISTRY;</span> |
| <span class="source-line-no">062</span><span id="line-62"></span> |
| <span class="source-line-no">063</span><span id="line-63"> @BeforeClass</span> |
| <span class="source-line-no">064</span><span id="line-64"> public static void setUp() throws Exception {</span> |
| <span class="source-line-no">065</span><span id="line-65"> TEST_UTIL.startMiniCluster(3);</span> |
| <span class="source-line-no">066</span><span id="line-66"> HBaseTestingUtil.setReplicas(TEST_UTIL.getAdmin(), TableName.META_TABLE_NAME, 3);</span> |
| <span class="source-line-no">067</span><span id="line-67"> REGISTRY = ConnectionRegistryFactory.create(TEST_UTIL.getConfiguration(), User.getCurrent());</span> |
| <span class="source-line-no">068</span><span id="line-68"> RegionReplicaTestHelper.waitUntilAllMetaReplicasAreReady(TEST_UTIL, REGISTRY);</span> |
| <span class="source-line-no">069</span><span id="line-69"> TEST_UTIL.getAdmin().balancerSwitch(false, true);</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"> @AfterClass</span> |
| <span class="source-line-no">073</span><span id="line-73"> public static void cleanUp() throws Exception {</span> |
| <span class="source-line-no">074</span><span id="line-74"> Closeables.close(REGISTRY, true);</span> |
| <span class="source-line-no">075</span><span id="line-75"> TEST_UTIL.shutdownMiniCluster();</span> |
| <span class="source-line-no">076</span><span id="line-76"> }</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 List<HRegionLocation> getCurrentMetaLocations(ZKWatcher zk) throws Exception {</span> |
| <span class="source-line-no">079</span><span id="line-79"> List<HRegionLocation> result = new ArrayList<>();</span> |
| <span class="source-line-no">080</span><span id="line-80"> for (String znode : zk.getMetaReplicaNodes()) {</span> |
| <span class="source-line-no">081</span><span id="line-81"> String path = ZNodePaths.joinZNode(zk.getZNodePaths().baseZNode, znode);</span> |
| <span class="source-line-no">082</span><span id="line-82"> int replicaId = zk.getZNodePaths().getMetaReplicaIdFromPath(path);</span> |
| <span class="source-line-no">083</span><span id="line-83"> RegionState state = MetaTableLocator.getMetaRegionState(zk, replicaId);</span> |
| <span class="source-line-no">084</span><span id="line-84"> result.add(new HRegionLocation(state.getRegion(), state.getServerName()));</span> |
| <span class="source-line-no">085</span><span id="line-85"> }</span> |
| <span class="source-line-no">086</span><span id="line-86"> return result;</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> // Verifies that the cached meta locations in the given master are in sync with what is in ZK.</span> |
| <span class="source-line-no">090</span><span id="line-90"> private void verifyCachedMetaLocations(HMaster master) throws Exception {</span> |
| <span class="source-line-no">091</span><span id="line-91"> // Wait until initial meta locations are loaded.</span> |
| <span class="source-line-no">092</span><span id="line-92"> int retries = 0;</span> |
| <span class="source-line-no">093</span><span id="line-93"> while (master.getMetaRegionLocationCache().getMetaRegionLocations().isEmpty()) {</span> |
| <span class="source-line-no">094</span><span id="line-94"> Thread.sleep(1000);</span> |
| <span class="source-line-no">095</span><span id="line-95"> if (++retries == 10) {</span> |
| <span class="source-line-no">096</span><span id="line-96"> break;</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</span> |
| <span class="source-line-no">098</span><span id="line-98"> }</span> |
| <span class="source-line-no">099</span><span id="line-99"> ZKWatcher zk = master.getZooKeeper();</span> |
| <span class="source-line-no">100</span><span id="line-100"> List<String> metaZnodes = zk.getMetaReplicaNodes();</span> |
| <span class="source-line-no">101</span><span id="line-101"> // Wait till all replicas available.</span> |
| <span class="source-line-no">102</span><span id="line-102"> retries = 0;</span> |
| <span class="source-line-no">103</span><span id="line-103"> while (</span> |
| <span class="source-line-no">104</span><span id="line-104"> master.getMetaRegionLocationCache().getMetaRegionLocations().size() != metaZnodes.size()</span> |
| <span class="source-line-no">105</span><span id="line-105"> ) {</span> |
| <span class="source-line-no">106</span><span id="line-106"> Thread.sleep(1000);</span> |
| <span class="source-line-no">107</span><span id="line-107"> if (++retries == 10) {</span> |
| <span class="source-line-no">108</span><span id="line-108"> break;</span> |
| <span class="source-line-no">109</span><span id="line-109"> }</span> |
| <span class="source-line-no">110</span><span id="line-110"> }</span> |
| <span class="source-line-no">111</span><span id="line-111"> List<HRegionLocation> metaHRLs = master.getMetaRegionLocationCache().getMetaRegionLocations();</span> |
| <span class="source-line-no">112</span><span id="line-112"> assertFalse(metaHRLs.isEmpty());</span> |
| <span class="source-line-no">113</span><span id="line-113"> assertEquals(metaZnodes.size(), metaHRLs.size());</span> |
| <span class="source-line-no">114</span><span id="line-114"> List<HRegionLocation> actualHRLs = getCurrentMetaLocations(zk);</span> |
| <span class="source-line-no">115</span><span id="line-115"> Collections.sort(metaHRLs);</span> |
| <span class="source-line-no">116</span><span id="line-116"> Collections.sort(actualHRLs);</span> |
| <span class="source-line-no">117</span><span id="line-117"> assertEquals(actualHRLs, metaHRLs);</span> |
| <span class="source-line-no">118</span><span id="line-118"> }</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> @Test</span> |
| <span class="source-line-no">121</span><span id="line-121"> public void testInitialMetaLocations() throws Exception {</span> |
| <span class="source-line-no">122</span><span id="line-122"> verifyCachedMetaLocations(TEST_UTIL.getMiniHBaseCluster().getMaster());</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"> @Test</span> |
| <span class="source-line-no">126</span><span id="line-126"> public void testStandByMetaLocations() throws Exception {</span> |
| <span class="source-line-no">127</span><span id="line-127"> HMaster standBy = TEST_UTIL.getMiniHBaseCluster().startMaster().getMaster();</span> |
| <span class="source-line-no">128</span><span id="line-128"> verifyCachedMetaLocations(standBy);</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"> /*</span> |
| <span class="source-line-no">132</span><span id="line-132"> * Shuffles the meta region replicas around the cluster and makes sure the cache is not stale.</span> |
| <span class="source-line-no">133</span><span id="line-133"> */</span> |
| <span class="source-line-no">134</span><span id="line-134"> @Test</span> |
| <span class="source-line-no">135</span><span id="line-135"> public void testMetaLocationsChange() throws Exception {</span> |
| <span class="source-line-no">136</span><span id="line-136"> List<HRegionLocation> currentMetaLocs =</span> |
| <span class="source-line-no">137</span><span id="line-137"> getCurrentMetaLocations(TEST_UTIL.getMiniHBaseCluster().getMaster().getZooKeeper());</span> |
| <span class="source-line-no">138</span><span id="line-138"> // Move these replicas to random servers.</span> |
| <span class="source-line-no">139</span><span id="line-139"> for (HRegionLocation location : currentMetaLocs) {</span> |
| <span class="source-line-no">140</span><span id="line-140"> RegionReplicaTestHelper.moveRegion(TEST_UTIL, location);</span> |
| <span class="source-line-no">141</span><span id="line-141"> }</span> |
| <span class="source-line-no">142</span><span id="line-142"> RegionReplicaTestHelper.waitUntilAllMetaReplicasAreReady(TEST_UTIL, REGISTRY);</span> |
| <span class="source-line-no">143</span><span id="line-143"> for (JVMClusterUtil.MasterThread masterThread : TEST_UTIL.getMiniHBaseCluster()</span> |
| <span class="source-line-no">144</span><span id="line-144"> .getMasterThreads()) {</span> |
| <span class="source-line-no">145</span><span id="line-145"> verifyCachedMetaLocations(masterThread.getMaster());</span> |
| <span class="source-line-no">146</span><span id="line-146"> }</span> |
| <span class="source-line-no">147</span><span id="line-147"> }</span> |
| <span class="source-line-no">148</span><span id="line-148"></span> |
| <span class="source-line-no">149</span><span id="line-149"> /**</span> |
| <span class="source-line-no">150</span><span id="line-150"> * Tests MetaRegionLocationCache's init procedure to make sure that it correctly watches the base</span> |
| <span class="source-line-no">151</span><span id="line-151"> * znode for notifications.</span> |
| <span class="source-line-no">152</span><span id="line-152"> */</span> |
| <span class="source-line-no">153</span><span id="line-153"> @Test</span> |
| <span class="source-line-no">154</span><span id="line-154"> public void testMetaRegionLocationCache() throws Exception {</span> |
| <span class="source-line-no">155</span><span id="line-155"> final String parentZnodeName = "/randomznodename";</span> |
| <span class="source-line-no">156</span><span id="line-156"> Configuration conf = new Configuration(TEST_UTIL.getConfiguration());</span> |
| <span class="source-line-no">157</span><span id="line-157"> conf.set(HConstants.ZOOKEEPER_ZNODE_PARENT, parentZnodeName);</span> |
| <span class="source-line-no">158</span><span id="line-158"> ServerName sn = ServerName.valueOf("localhost", 1234, 5678);</span> |
| <span class="source-line-no">159</span><span id="line-159"> try (ZKWatcher zkWatcher = new ZKWatcher(conf, null, null, true)) {</span> |
| <span class="source-line-no">160</span><span id="line-160"> // A thread that repeatedly creates and drops an unrelated child znode. This is to simulate</span> |
| <span class="source-line-no">161</span><span id="line-161"> // some ZK activity in the background.</span> |
| <span class="source-line-no">162</span><span id="line-162"> MultithreadedTestUtil.TestContext ctx = new MultithreadedTestUtil.TestContext(conf);</span> |
| <span class="source-line-no">163</span><span id="line-163"> ctx.addThread(new MultithreadedTestUtil.RepeatingTestThread(ctx) {</span> |
| <span class="source-line-no">164</span><span id="line-164"> @Override</span> |
| <span class="source-line-no">165</span><span id="line-165"> public void doAnAction() throws Exception {</span> |
| <span class="source-line-no">166</span><span id="line-166"> final String testZnode = parentZnodeName + "/child";</span> |
| <span class="source-line-no">167</span><span id="line-167"> ZKUtil.createNodeIfNotExistsAndWatch(zkWatcher, testZnode, testZnode.getBytes());</span> |
| <span class="source-line-no">168</span><span id="line-168"> ZKUtil.deleteNode(zkWatcher, testZnode);</span> |
| <span class="source-line-no">169</span><span id="line-169"> }</span> |
| <span class="source-line-no">170</span><span id="line-170"> });</span> |
| <span class="source-line-no">171</span><span id="line-171"> ctx.startThreads();</span> |
| <span class="source-line-no">172</span><span id="line-172"> try {</span> |
| <span class="source-line-no">173</span><span id="line-173"> MetaRegionLocationCache metaCache = new MetaRegionLocationCache(zkWatcher);</span> |
| <span class="source-line-no">174</span><span id="line-174"> // meta znodes do not exist at this point, cache should be empty.</span> |
| <span class="source-line-no">175</span><span id="line-175"> assertTrue(metaCache.getMetaRegionLocations().isEmpty());</span> |
| <span class="source-line-no">176</span><span id="line-176"> // Set the meta locations for a random meta replicas, simulating an active hmaster meta</span> |
| <span class="source-line-no">177</span><span id="line-177"> // assignment.</span> |
| <span class="source-line-no">178</span><span id="line-178"> for (int i = 0; i < 3; i++) {</span> |
| <span class="source-line-no">179</span><span id="line-179"> // Updates the meta znodes.</span> |
| <span class="source-line-no">180</span><span id="line-180"> MetaTableLocator.setMetaLocation(zkWatcher, sn, i, RegionState.State.OPEN);</span> |
| <span class="source-line-no">181</span><span id="line-181"> }</span> |
| <span class="source-line-no">182</span><span id="line-182"> // Wait until the meta cache is populated.</span> |
| <span class="source-line-no">183</span><span id="line-183"> int iters = 0;</span> |
| <span class="source-line-no">184</span><span id="line-184"> while (iters++ < 10) {</span> |
| <span class="source-line-no">185</span><span id="line-185"> if (metaCache.getMetaRegionLocations().size() == 3) {</span> |
| <span class="source-line-no">186</span><span id="line-186"> break;</span> |
| <span class="source-line-no">187</span><span id="line-187"> }</span> |
| <span class="source-line-no">188</span><span id="line-188"> Thread.sleep(1000);</span> |
| <span class="source-line-no">189</span><span id="line-189"> }</span> |
| <span class="source-line-no">190</span><span id="line-190"> List<HRegionLocation> metaLocations = metaCache.getMetaRegionLocations();</span> |
| <span class="source-line-no">191</span><span id="line-191"> assertEquals(3, metaLocations.size());</span> |
| <span class="source-line-no">192</span><span id="line-192"> for (HRegionLocation location : metaLocations) {</span> |
| <span class="source-line-no">193</span><span id="line-193"> assertEquals(sn, location.getServerName());</span> |
| <span class="source-line-no">194</span><span id="line-194"> }</span> |
| <span class="source-line-no">195</span><span id="line-195"> } finally {</span> |
| <span class="source-line-no">196</span><span id="line-196"> // clean up.</span> |
| <span class="source-line-no">197</span><span id="line-197"> ctx.stop();</span> |
| <span class="source-line-no">198</span><span id="line-198"> ZKUtil.deleteChildrenRecursively(zkWatcher, parentZnodeName);</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">}</span> |
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| </div> |
| </main> |
| </body> |
| </html> |
