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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.client;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import static org.junit.Assert.assertEquals;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.junit.Assert.assertFalse;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.junit.Assert.assertTrue;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.ArrayList;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.Collections;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.List;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configuration;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HBaseTestingUtil;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HConstants;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.MetaRegionLocationCache;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.MultithreadedTestUtil;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.ServerName;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.TableName;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.master.HMaster;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.master.RegionState;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.security.User;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.util.JVMClusterUtil;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.zookeeper.ZKWatcher;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.zookeeper.ZNodePaths;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import org.junit.AfterClass;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>import org.junit.BeforeClass;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span>import org.junit.ClassRule;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>import org.junit.Test;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>import org.junit.experimental.categories.Category;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span><a name="line.51"></a> |
| <span class="sourceLineNo">052</span>import org.apache.hbase.thirdparty.com.google.common.io.Closeables;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span>@Category({ SmallTests.class, MasterTests.class })<a name="line.54"></a> |
| <span class="sourceLineNo">055</span>public class TestMetaRegionLocationCache {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> @ClassRule<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> HBaseClassTestRule.forClass(TestMetaRegionLocationCache.class);<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> private static ConnectionRegistry REGISTRY;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> @BeforeClass<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> public static void setUp() throws Exception {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> TEST_UTIL.startMiniCluster(3);<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> HBaseTestingUtil.setReplicas(TEST_UTIL.getAdmin(), TableName.META_TABLE_NAME, 3);<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> REGISTRY = ConnectionRegistryFactory.create(TEST_UTIL.getConfiguration(), User.getCurrent());<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> RegionReplicaTestHelper.waitUntilAllMetaReplicasAreReady(TEST_UTIL, REGISTRY);<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> TEST_UTIL.getAdmin().balancerSwitch(false, true);<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> }<a name="line.70"></a> |
| <span class="sourceLineNo">071</span><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> @AfterClass<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> public static void cleanUp() throws Exception {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> Closeables.close(REGISTRY, true);<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> TEST_UTIL.shutdownMiniCluster();<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> }<a name="line.76"></a> |
| <span class="sourceLineNo">077</span><a name="line.77"></a> |
| <span class="sourceLineNo">078</span> private List<HRegionLocation> getCurrentMetaLocations(ZKWatcher zk) throws Exception {<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> List<HRegionLocation> result = new ArrayList<>();<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> for (String znode : zk.getMetaReplicaNodes()) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> String path = ZNodePaths.joinZNode(zk.getZNodePaths().baseZNode, znode);<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> int replicaId = zk.getZNodePaths().getMetaReplicaIdFromPath(path);<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> RegionState state = MetaTableLocator.getMetaRegionState(zk, replicaId);<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> result.add(new HRegionLocation(state.getRegion(), state.getServerName()));<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> return result;<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> }<a name="line.87"></a> |
| <span class="sourceLineNo">088</span><a name="line.88"></a> |
| <span class="sourceLineNo">089</span> // Verifies that the cached meta locations in the given master are in sync with what is in ZK.<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> private void verifyCachedMetaLocations(HMaster master) throws Exception {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> // Wait until initial meta locations are loaded.<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> int retries = 0;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> while (master.getMetaRegionLocationCache().getMetaRegionLocations().isEmpty()) {<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> Thread.sleep(1000);<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> if (++retries == 10) {<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> break;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> ZKWatcher zk = master.getZooKeeper();<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> List<String> metaZnodes = zk.getMetaReplicaNodes();<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> // Wait till all replicas available.<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> retries = 0;<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> while (<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> master.getMetaRegionLocationCache().getMetaRegionLocations().size() != metaZnodes.size()<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> ) {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> Thread.sleep(1000);<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> if (++retries == 10) {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> break;<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> }<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> }<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> List<HRegionLocation> metaHRLs = master.getMetaRegionLocationCache().getMetaRegionLocations();<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> assertFalse(metaHRLs.isEmpty());<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> assertEquals(metaZnodes.size(), metaHRLs.size());<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> List<HRegionLocation> actualHRLs = getCurrentMetaLocations(zk);<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> Collections.sort(metaHRLs);<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> Collections.sort(actualHRLs);<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> assertEquals(actualHRLs, metaHRLs);<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> }<a name="line.118"></a> |
| <span class="sourceLineNo">119</span><a name="line.119"></a> |
| <span class="sourceLineNo">120</span> @Test<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> public void testInitialMetaLocations() throws Exception {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> verifyCachedMetaLocations(TEST_UTIL.getMiniHBaseCluster().getMaster());<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> }<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> @Test<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> public void testStandByMetaLocations() throws Exception {<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> HMaster standBy = TEST_UTIL.getMiniHBaseCluster().startMaster().getMaster();<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> verifyCachedMetaLocations(standBy);<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> /*<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * Shuffles the meta region replicas around the cluster and makes sure the cache is not stale.<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> */<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> @Test<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> public void testMetaLocationsChange() throws Exception {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> List<HRegionLocation> currentMetaLocs =<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> getCurrentMetaLocations(TEST_UTIL.getMiniHBaseCluster().getMaster().getZooKeeper());<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> // Move these replicas to random servers.<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> for (HRegionLocation location : currentMetaLocs) {<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> RegionReplicaTestHelper.moveRegion(TEST_UTIL, location);<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> }<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> RegionReplicaTestHelper.waitUntilAllMetaReplicasAreReady(TEST_UTIL, REGISTRY);<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> for (JVMClusterUtil.MasterThread masterThread : TEST_UTIL.getMiniHBaseCluster()<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> .getMasterThreads()) {<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> verifyCachedMetaLocations(masterThread.getMaster());<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> }<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> }<a name="line.147"></a> |
| <span class="sourceLineNo">148</span><a name="line.148"></a> |
| <span class="sourceLineNo">149</span> /**<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> * Tests MetaRegionLocationCache's init procedure to make sure that it correctly watches the base<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> * znode for notifications.<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> */<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> @Test<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> public void testMetaRegionLocationCache() throws Exception {<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> final String parentZnodeName = "/randomznodename";<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> Configuration conf = new Configuration(TEST_UTIL.getConfiguration());<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> conf.set(HConstants.ZOOKEEPER_ZNODE_PARENT, parentZnodeName);<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> ServerName sn = ServerName.valueOf("localhost", 1234, 5678);<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> try (ZKWatcher zkWatcher = new ZKWatcher(conf, null, null, true)) {<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> // A thread that repeatedly creates and drops an unrelated child znode. This is to simulate<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> // some ZK activity in the background.<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> MultithreadedTestUtil.TestContext ctx = new MultithreadedTestUtil.TestContext(conf);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> ctx.addThread(new MultithreadedTestUtil.RepeatingTestThread(ctx) {<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> @Override<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> public void doAnAction() throws Exception {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> final String testZnode = parentZnodeName + "/child";<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> ZKUtil.createNodeIfNotExistsAndWatch(zkWatcher, testZnode, testZnode.getBytes());<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> ZKUtil.deleteNode(zkWatcher, testZnode);<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> }<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> });<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> ctx.startThreads();<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> try {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> MetaRegionLocationCache metaCache = new MetaRegionLocationCache(zkWatcher);<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> // meta znodes do not exist at this point, cache should be empty.<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> assertTrue(metaCache.getMetaRegionLocations().isEmpty());<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> // Set the meta locations for a random meta replicas, simulating an active hmaster meta<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> // assignment.<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> for (int i = 0; i < 3; i++) {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> // Updates the meta znodes.<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> MetaTableLocator.setMetaLocation(zkWatcher, sn, i, RegionState.State.OPEN);<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> }<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> // Wait until the meta cache is populated.<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> int iters = 0;<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> while (iters++ < 10) {<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> if (metaCache.getMetaRegionLocations().size() == 3) {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> break;<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> }<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> Thread.sleep(1000);<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> }<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> List<HRegionLocation> metaLocations = metaCache.getMetaRegionLocations();<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> assertEquals(3, metaLocations.size());<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> for (HRegionLocation location : metaLocations) {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> assertEquals(sn, location.getServerName());<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> }<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> } finally {<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> // clean up.<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> ctx.stop();<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> ZKUtil.deleteChildrenRecursively(zkWatcher, parentZnodeName);<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> }<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> }<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> }<a name="line.201"></a> |
| <span class="sourceLineNo">202</span>}<a name="line.202"></a> |
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