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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;</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.assertNull;</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.io.IOException;</span>
<span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.master.RegionState;</span>
<span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.testclassification.MediumTests;</span>
<span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.testclassification.MiscTests;</span>
<span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span>
<span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.util.Threads;</span>
<span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;</span>
<span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.zookeeper.ZKWatcher;</span>
<span class="source-line-no">032</span><span id="line-32">import org.apache.zookeeper.KeeperException;</span>
<span class="source-line-no">033</span><span id="line-33">import org.junit.After;</span>
<span class="source-line-no">034</span><span id="line-34">import org.junit.AfterClass;</span>
<span class="source-line-no">035</span><span id="line-35">import org.junit.Before;</span>
<span class="source-line-no">036</span><span id="line-36">import org.junit.BeforeClass;</span>
<span class="source-line-no">037</span><span id="line-37">import org.junit.ClassRule;</span>
<span class="source-line-no">038</span><span id="line-38">import org.junit.Test;</span>
<span class="source-line-no">039</span><span id="line-39">import org.junit.experimental.categories.Category;</span>
<span class="source-line-no">040</span><span id="line-40">import org.mockito.Mockito;</span>
<span class="source-line-no">041</span><span id="line-41">import org.slf4j.Logger;</span>
<span class="source-line-no">042</span><span id="line-42">import org.slf4j.LoggerFactory;</span>
<span class="source-line-no">043</span><span id="line-43"></span>
<span class="source-line-no">044</span><span id="line-44">import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;</span>
<span class="source-line-no">045</span><span id="line-45">import org.apache.hbase.thirdparty.com.google.protobuf.ServiceException;</span>
<span class="source-line-no">046</span><span id="line-46"></span>
<span class="source-line-no">047</span><span id="line-47">import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos;</span>
<span class="source-line-no">048</span><span id="line-48">import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.GetRequest;</span>
<span class="source-line-no">049</span><span id="line-49">import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.GetResponse;</span>
<span class="source-line-no">050</span><span id="line-50"></span>
<span class="source-line-no">051</span><span id="line-51">/**</span>
<span class="source-line-no">052</span><span id="line-52"> * Test {@link org.apache.hadoop.hbase.zookeeper.MetaTableLocator}</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({ MiscTests.class, MediumTests.class })</span>
<span class="source-line-no">055</span><span id="line-55">public class TestMetaTableLocator {</span>
<span class="source-line-no">056</span><span id="line-56"></span>
<span class="source-line-no">057</span><span id="line-57"> @ClassRule</span>
<span class="source-line-no">058</span><span id="line-58"> public static final HBaseClassTestRule CLASS_RULE =</span>
<span class="source-line-no">059</span><span id="line-59"> HBaseClassTestRule.forClass(TestMetaTableLocator.class);</span>
<span class="source-line-no">060</span><span id="line-60"></span>
<span class="source-line-no">061</span><span id="line-61"> private static final Logger LOG = LoggerFactory.getLogger(TestMetaTableLocator.class);</span>
<span class="source-line-no">062</span><span id="line-62"> private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();</span>
<span class="source-line-no">063</span><span id="line-63"> private static final ServerName SN =</span>
<span class="source-line-no">064</span><span id="line-64"> ServerName.valueOf("example.org", 1234, EnvironmentEdgeManager.currentTime());</span>
<span class="source-line-no">065</span><span id="line-65"> private ZKWatcher watcher;</span>
<span class="source-line-no">066</span><span id="line-66"> private Abortable abortable;</span>
<span class="source-line-no">067</span><span id="line-67"></span>
<span class="source-line-no">068</span><span id="line-68"> @BeforeClass</span>
<span class="source-line-no">069</span><span id="line-69"> public static void beforeClass() throws Exception {</span>
<span class="source-line-no">070</span><span id="line-70"> // Set this down so tests run quicker</span>
<span class="source-line-no">071</span><span id="line-71"> UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 3);</span>
<span class="source-line-no">072</span><span id="line-72"> UTIL.startMiniZKCluster();</span>
<span class="source-line-no">073</span><span id="line-73"> }</span>
<span class="source-line-no">074</span><span id="line-74"></span>
<span class="source-line-no">075</span><span id="line-75"> @AfterClass</span>
<span class="source-line-no">076</span><span id="line-76"> public static void afterClass() throws IOException {</span>
<span class="source-line-no">077</span><span id="line-77"> UTIL.getZkCluster().shutdown();</span>
<span class="source-line-no">078</span><span id="line-78"> }</span>
<span class="source-line-no">079</span><span id="line-79"></span>
<span class="source-line-no">080</span><span id="line-80"> @Before</span>
<span class="source-line-no">081</span><span id="line-81"> public void before() throws IOException {</span>
<span class="source-line-no">082</span><span id="line-82"> this.abortable = new Abortable() {</span>
<span class="source-line-no">083</span><span id="line-83"> @Override</span>
<span class="source-line-no">084</span><span id="line-84"> public void abort(String why, Throwable e) {</span>
<span class="source-line-no">085</span><span id="line-85"> LOG.info(why, e);</span>
<span class="source-line-no">086</span><span id="line-86"> }</span>
<span class="source-line-no">087</span><span id="line-87"></span>
<span class="source-line-no">088</span><span id="line-88"> @Override</span>
<span class="source-line-no">089</span><span id="line-89"> public boolean isAborted() {</span>
<span class="source-line-no">090</span><span id="line-90"> return false;</span>
<span class="source-line-no">091</span><span id="line-91"> }</span>
<span class="source-line-no">092</span><span id="line-92"> };</span>
<span class="source-line-no">093</span><span id="line-93"> this.watcher =</span>
<span class="source-line-no">094</span><span id="line-94"> new ZKWatcher(UTIL.getConfiguration(), this.getClass().getSimpleName(), this.abortable, true);</span>
<span class="source-line-no">095</span><span id="line-95"> }</span>
<span class="source-line-no">096</span><span id="line-96"></span>
<span class="source-line-no">097</span><span id="line-97"> @After</span>
<span class="source-line-no">098</span><span id="line-98"> public void after() {</span>
<span class="source-line-no">099</span><span id="line-99"> try {</span>
<span class="source-line-no">100</span><span id="line-100"> // Clean out meta location or later tests will be confused... they presume</span>
<span class="source-line-no">101</span><span id="line-101"> // start fresh in zk.</span>
<span class="source-line-no">102</span><span id="line-102"> MetaTableLocator.deleteMetaLocation(this.watcher);</span>
<span class="source-line-no">103</span><span id="line-103"> } catch (KeeperException e) {</span>
<span class="source-line-no">104</span><span id="line-104"> LOG.warn("Unable to delete hbase:meta location", e);</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"> this.watcher.close();</span>
<span class="source-line-no">108</span><span id="line-108"> }</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"> * Test normal operations</span>
<span class="source-line-no">112</span><span id="line-112"> */</span>
<span class="source-line-no">113</span><span id="line-113"> @Test</span>
<span class="source-line-no">114</span><span id="line-114"> public void testMetaLookup()</span>
<span class="source-line-no">115</span><span id="line-115"> throws IOException, InterruptedException, ServiceException, KeeperException {</span>
<span class="source-line-no">116</span><span id="line-116"> final ClientProtos.ClientService.BlockingInterface client =</span>
<span class="source-line-no">117</span><span id="line-117"> Mockito.mock(ClientProtos.ClientService.BlockingInterface.class);</span>
<span class="source-line-no">118</span><span id="line-118"></span>
<span class="source-line-no">119</span><span id="line-119"> Mockito.when(client.get((RpcController) Mockito.any(), (GetRequest) Mockito.any()))</span>
<span class="source-line-no">120</span><span id="line-120"> .thenReturn(GetResponse.newBuilder().build());</span>
<span class="source-line-no">121</span><span id="line-121"></span>
<span class="source-line-no">122</span><span id="line-122"> assertNull(MetaTableLocator.getMetaRegionLocation(this.watcher));</span>
<span class="source-line-no">123</span><span id="line-123"> for (RegionState.State state : RegionState.State.values()) {</span>
<span class="source-line-no">124</span><span id="line-124"> if (state.equals(RegionState.State.OPEN)) {</span>
<span class="source-line-no">125</span><span id="line-125"> continue;</span>
<span class="source-line-no">126</span><span id="line-126"> }</span>
<span class="source-line-no">127</span><span id="line-127"> MetaTableLocator.setMetaLocation(this.watcher, SN, state);</span>
<span class="source-line-no">128</span><span id="line-128"> assertNull(MetaTableLocator.getMetaRegionLocation(this.watcher));</span>
<span class="source-line-no">129</span><span id="line-129"> assertEquals(state, MetaTableLocator.getMetaRegionState(this.watcher).getState());</span>
<span class="source-line-no">130</span><span id="line-130"> }</span>
<span class="source-line-no">131</span><span id="line-131"> MetaTableLocator.setMetaLocation(this.watcher, SN, RegionState.State.OPEN);</span>
<span class="source-line-no">132</span><span id="line-132"> assertEquals(SN, MetaTableLocator.getMetaRegionLocation(this.watcher));</span>
<span class="source-line-no">133</span><span id="line-133"> assertEquals(RegionState.State.OPEN,</span>
<span class="source-line-no">134</span><span id="line-134"> MetaTableLocator.getMetaRegionState(this.watcher).getState());</span>
<span class="source-line-no">135</span><span id="line-135"></span>
<span class="source-line-no">136</span><span id="line-136"> MetaTableLocator.deleteMetaLocation(this.watcher);</span>
<span class="source-line-no">137</span><span id="line-137"> assertNull(MetaTableLocator.getMetaRegionState(this.watcher).getServerName());</span>
<span class="source-line-no">138</span><span id="line-138"> assertEquals(RegionState.State.OFFLINE,</span>
<span class="source-line-no">139</span><span id="line-139"> MetaTableLocator.getMetaRegionState(this.watcher).getState());</span>
<span class="source-line-no">140</span><span id="line-140"> assertNull(MetaTableLocator.getMetaRegionLocation(this.watcher));</span>
<span class="source-line-no">141</span><span id="line-141"> }</span>
<span class="source-line-no">142</span><span id="line-142"></span>
<span class="source-line-no">143</span><span id="line-143"> @Test(expected = NotAllMetaRegionsOnlineException.class)</span>
<span class="source-line-no">144</span><span id="line-144"> public void testTimeoutWaitForMeta() throws IOException, InterruptedException {</span>
<span class="source-line-no">145</span><span id="line-145"> MetaTableLocator.waitMetaRegionLocation(watcher, 100);</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"> * Test waiting on meat w/ no timeout specified.</span>
<span class="source-line-no">150</span><span id="line-150"> */</span>
<span class="source-line-no">151</span><span id="line-151"> @Test</span>
<span class="source-line-no">152</span><span id="line-152"> public void testNoTimeoutWaitForMeta() throws IOException, InterruptedException, KeeperException {</span>
<span class="source-line-no">153</span><span id="line-153"> ServerName hsa = MetaTableLocator.getMetaRegionLocation(watcher);</span>
<span class="source-line-no">154</span><span id="line-154"> assertNull(hsa);</span>
<span class="source-line-no">155</span><span id="line-155"></span>
<span class="source-line-no">156</span><span id="line-156"> // Now test waiting on meta location getting set.</span>
<span class="source-line-no">157</span><span id="line-157"> Thread t = new WaitOnMetaThread();</span>
<span class="source-line-no">158</span><span id="line-158"> startWaitAliveThenWaitItLives(t, 1);</span>
<span class="source-line-no">159</span><span id="line-159"> // Set a meta location.</span>
<span class="source-line-no">160</span><span id="line-160"> MetaTableLocator.setMetaLocation(this.watcher, SN, RegionState.State.OPEN);</span>
<span class="source-line-no">161</span><span id="line-161"> hsa = SN;</span>
<span class="source-line-no">162</span><span id="line-162"> // Join the thread... should exit shortly.</span>
<span class="source-line-no">163</span><span id="line-163"> t.join();</span>
<span class="source-line-no">164</span><span id="line-164"> // Now meta is available.</span>
<span class="source-line-no">165</span><span id="line-165"> assertTrue(MetaTableLocator.getMetaRegionLocation(watcher).equals(hsa));</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"> private void startWaitAliveThenWaitItLives(final Thread t, final int ms) {</span>
<span class="source-line-no">169</span><span id="line-169"> t.start();</span>
<span class="source-line-no">170</span><span id="line-170"> UTIL.waitFor(2000, t::isAlive);</span>
<span class="source-line-no">171</span><span id="line-171"> // Wait one second.</span>
<span class="source-line-no">172</span><span id="line-172"> Threads.sleep(ms);</span>
<span class="source-line-no">173</span><span id="line-173"> assertTrue("Assert " + t.getName() + " still waiting", t.isAlive());</span>
<span class="source-line-no">174</span><span id="line-174"> }</span>
<span class="source-line-no">175</span><span id="line-175"></span>
<span class="source-line-no">176</span><span id="line-176"> /**</span>
<span class="source-line-no">177</span><span id="line-177"> * Wait on META.</span>
<span class="source-line-no">178</span><span id="line-178"> */</span>
<span class="source-line-no">179</span><span id="line-179"> class WaitOnMetaThread extends Thread {</span>
<span class="source-line-no">180</span><span id="line-180"></span>
<span class="source-line-no">181</span><span id="line-181"> WaitOnMetaThread() {</span>
<span class="source-line-no">182</span><span id="line-182"> super("WaitOnMeta");</span>
<span class="source-line-no">183</span><span id="line-183"> }</span>
<span class="source-line-no">184</span><span id="line-184"></span>
<span class="source-line-no">185</span><span id="line-185"> @Override</span>
<span class="source-line-no">186</span><span id="line-186"> public void run() {</span>
<span class="source-line-no">187</span><span id="line-187"> try {</span>
<span class="source-line-no">188</span><span id="line-188"> doWaiting();</span>
<span class="source-line-no">189</span><span id="line-189"> } catch (InterruptedException e) {</span>
<span class="source-line-no">190</span><span id="line-190"> throw new RuntimeException("Failed wait", e);</span>
<span class="source-line-no">191</span><span id="line-191"> }</span>
<span class="source-line-no">192</span><span id="line-192"> LOG.info("Exiting " + getName());</span>
<span class="source-line-no">193</span><span id="line-193"> }</span>
<span class="source-line-no">194</span><span id="line-194"></span>
<span class="source-line-no">195</span><span id="line-195"> void doWaiting() throws InterruptedException {</span>
<span class="source-line-no">196</span><span id="line-196"> try {</span>
<span class="source-line-no">197</span><span id="line-197"> for (;;) {</span>
<span class="source-line-no">198</span><span id="line-198"> if (MetaTableLocator.waitMetaRegionLocation(watcher, 10000) != null) {</span>
<span class="source-line-no">199</span><span id="line-199"> break;</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"> } catch (NotAllMetaRegionsOnlineException e) {</span>
<span class="source-line-no">203</span><span id="line-203"> // Ignore</span>
<span class="source-line-no">204</span><span id="line-204"> }</span>
<span class="source-line-no">205</span><span id="line-205"> }</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>
</pre>
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