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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.assertTrue;</span> |
| <span class="source-line-no">022</span><span id="line-22">import static org.junit.Assert.fail;</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 java.io.InterruptedIOException;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.ArrayList;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.Arrays;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.Collection;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.List;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.Admin;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.client.BalanceResponse;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.client.Connection;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.client.ConnectionFactory;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.client.RegionInfo;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.client.RegionLocator;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.client.TableDescriptor;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.client.TableDescriptorBuilder;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.regionserver.HRegionServer;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.testclassification.FlakeyTests;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.testclassification.LargeTests;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.util.JVMClusterUtil;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.util.Threads;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.junit.After;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.junit.Before;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.junit.ClassRule;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.junit.Test;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.junit.experimental.categories.Category;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.junit.runner.RunWith;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.junit.runners.Parameterized;</span> |
| <span class="source-line-no">052</span><span id="line-52">import org.junit.runners.Parameterized.Parameters;</span> |
| <span class="source-line-no">053</span><span id="line-53">import org.slf4j.Logger;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56">import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58">/**</span> |
| <span class="source-line-no">059</span><span id="line-59"> * Test whether region re-balancing works. (HBASE-71) The test only works for cluster wide</span> |
| <span class="source-line-no">060</span><span id="line-60"> * balancing, not per table wide. Increase the margin a little to make StochasticLoadBalancer result</span> |
| <span class="source-line-no">061</span><span id="line-61"> * acceptable.</span> |
| <span class="source-line-no">062</span><span id="line-62"> */</span> |
| <span class="source-line-no">063</span><span id="line-63">@Category({ FlakeyTests.class, LargeTests.class })</span> |
| <span class="source-line-no">064</span><span id="line-64">@RunWith(value = Parameterized.class)</span> |
| <span class="source-line-no">065</span><span id="line-65">public class TestRegionRebalancing {</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> @ClassRule</span> |
| <span class="source-line-no">068</span><span id="line-68"> public static final HBaseClassTestRule CLASS_RULE =</span> |
| <span class="source-line-no">069</span><span id="line-69"> HBaseClassTestRule.forClass(TestRegionRebalancing.class);</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> @Parameters</span> |
| <span class="source-line-no">072</span><span id="line-72"> public static Collection<Object[]> data() {</span> |
| <span class="source-line-no">073</span><span id="line-73"> Object[][] balancers =</span> |
| <span class="source-line-no">074</span><span id="line-74"> new String[][] { { "org.apache.hadoop.hbase.master.balancer.SimpleLoadBalancer" },</span> |
| <span class="source-line-no">075</span><span id="line-75"> { "org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer" } };</span> |
| <span class="source-line-no">076</span><span id="line-76"> return Arrays.asList(balancers);</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> private static final byte[] FAMILY_NAME = Bytes.toBytes("col");</span> |
| <span class="source-line-no">080</span><span id="line-80"> private static final Logger LOG = LoggerFactory.getLogger(TestRegionRebalancing.class);</span> |
| <span class="source-line-no">081</span><span id="line-81"> private final HBaseTestingUtil UTIL = new HBaseTestingUtil();</span> |
| <span class="source-line-no">082</span><span id="line-82"> private RegionLocator regionLocator;</span> |
| <span class="source-line-no">083</span><span id="line-83"> private TableDescriptor tableDescriptor;</span> |
| <span class="source-line-no">084</span><span id="line-84"> private String balancerName;</span> |
| <span class="source-line-no">085</span><span id="line-85"></span> |
| <span class="source-line-no">086</span><span id="line-86"> public TestRegionRebalancing(String balancerName) {</span> |
| <span class="source-line-no">087</span><span id="line-87"> this.balancerName = balancerName;</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> }</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> @After</span> |
| <span class="source-line-no">092</span><span id="line-92"> public void after() throws Exception {</span> |
| <span class="source-line-no">093</span><span id="line-93"> UTIL.shutdownMiniCluster();</span> |
| <span class="source-line-no">094</span><span id="line-94"> }</span> |
| <span class="source-line-no">095</span><span id="line-95"></span> |
| <span class="source-line-no">096</span><span id="line-96"> @Before</span> |
| <span class="source-line-no">097</span><span id="line-97"> public void before() throws Exception {</span> |
| <span class="source-line-no">098</span><span id="line-98"> UTIL.getConfiguration().set("hbase.master.loadbalancer.class", this.balancerName);</span> |
| <span class="source-line-no">099</span><span id="line-99"> // set minCostNeedBalance to 0, make sure balancer run</span> |
| <span class="source-line-no">100</span><span id="line-100"> UTIL.startMiniCluster(1);</span> |
| <span class="source-line-no">101</span><span id="line-101"></span> |
| <span class="source-line-no">102</span><span id="line-102"> this.tableDescriptor = TableDescriptorBuilder.newBuilder(TableName.valueOf("test"))</span> |
| <span class="source-line-no">103</span><span id="line-103"> .setColumnFamily(ColumnFamilyDescriptorBuilder.of(FAMILY_NAME)).build();</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"> * For HBASE-71. Try a few different configurations of starting and stopping region servers to see</span> |
| <span class="source-line-no">108</span><span id="line-108"> * if the assignment or regions is pretty balanced.</span> |
| <span class="source-line-no">109</span><span id="line-109"> */</span> |
| <span class="source-line-no">110</span><span id="line-110"> @Test</span> |
| <span class="source-line-no">111</span><span id="line-111"> public void testRebalanceOnRegionServerNumberChange() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">112</span><span id="line-112"> try (Connection connection = ConnectionFactory.createConnection(UTIL.getConfiguration());</span> |
| <span class="source-line-no">113</span><span id="line-113"> Admin admin = connection.getAdmin()) {</span> |
| <span class="source-line-no">114</span><span id="line-114"> admin.createTable(this.tableDescriptor,</span> |
| <span class="source-line-no">115</span><span id="line-115"> Arrays.copyOfRange(HBaseTestingUtil.KEYS, 1, HBaseTestingUtil.KEYS.length));</span> |
| <span class="source-line-no">116</span><span id="line-116"> this.regionLocator = connection.getRegionLocator(this.tableDescriptor.getTableName());</span> |
| <span class="source-line-no">117</span><span id="line-117"></span> |
| <span class="source-line-no">118</span><span id="line-118"> MetaTableAccessor.fullScanMetaAndPrint(admin.getConnection());</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> assertEquals("Test table should have right number of regions", HBaseTestingUtil.KEYS.length,</span> |
| <span class="source-line-no">121</span><span id="line-121"> this.regionLocator.getStartKeys().length);</span> |
| <span class="source-line-no">122</span><span id="line-122"></span> |
| <span class="source-line-no">123</span><span id="line-123"> // verify that the region assignments are balanced to start out</span> |
| <span class="source-line-no">124</span><span id="line-124"> assertRegionsAreBalanced();</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> // add a region server - total of 2</span> |
| <span class="source-line-no">127</span><span id="line-127"> LOG.info("Started second server="</span> |
| <span class="source-line-no">128</span><span id="line-128"> + UTIL.getHBaseCluster().startRegionServer().getRegionServer().getServerName());</span> |
| <span class="source-line-no">129</span><span id="line-129"> UTIL.getHBaseCluster().getMaster().balance();</span> |
| <span class="source-line-no">130</span><span id="line-130"> assertRegionsAreBalanced();</span> |
| <span class="source-line-no">131</span><span id="line-131"></span> |
| <span class="source-line-no">132</span><span id="line-132"> // On a balanced cluster, calling balance() should return true</span> |
| <span class="source-line-no">133</span><span id="line-133"> BalanceResponse response = UTIL.getHBaseCluster().getMaster().balance();</span> |
| <span class="source-line-no">134</span><span id="line-134"> assertTrue(response.isBalancerRan());</span> |
| <span class="source-line-no">135</span><span id="line-135"> assertEquals(0, response.getMovesCalculated());</span> |
| <span class="source-line-no">136</span><span id="line-136"> assertEquals(0, response.getMovesExecuted());</span> |
| <span class="source-line-no">137</span><span id="line-137"></span> |
| <span class="source-line-no">138</span><span id="line-138"> // if we add a server, then the balance() call should return true</span> |
| <span class="source-line-no">139</span><span id="line-139"> // add a region server - total of 3</span> |
| <span class="source-line-no">140</span><span id="line-140"> LOG.info("Started third server="</span> |
| <span class="source-line-no">141</span><span id="line-141"> + UTIL.getHBaseCluster().startRegionServer().getRegionServer().getServerName());</span> |
| <span class="source-line-no">142</span><span id="line-142"> waitForAllRegionsAssigned();</span> |
| <span class="source-line-no">143</span><span id="line-143"></span> |
| <span class="source-line-no">144</span><span id="line-144"> response = UTIL.getHBaseCluster().getMaster().balance();</span> |
| <span class="source-line-no">145</span><span id="line-145"> assertTrue(response.isBalancerRan());</span> |
| <span class="source-line-no">146</span><span id="line-146"> assertTrue(response.getMovesCalculated() > 0);</span> |
| <span class="source-line-no">147</span><span id="line-147"> assertEquals(response.getMovesCalculated(), response.getMovesExecuted());</span> |
| <span class="source-line-no">148</span><span id="line-148"> assertRegionsAreBalanced();</span> |
| <span class="source-line-no">149</span><span id="line-149"></span> |
| <span class="source-line-no">150</span><span id="line-150"> // kill a region server - total of 2</span> |
| <span class="source-line-no">151</span><span id="line-151"> LOG.info("Stopped third server=" + UTIL.getHBaseCluster().stopRegionServer(2, false));</span> |
| <span class="source-line-no">152</span><span id="line-152"> UTIL.getHBaseCluster().waitOnRegionServer(2);</span> |
| <span class="source-line-no">153</span><span id="line-153"> waitOnCrashProcessing();</span> |
| <span class="source-line-no">154</span><span id="line-154"> UTIL.getHBaseCluster().getMaster().balance();</span> |
| <span class="source-line-no">155</span><span id="line-155"> assertRegionsAreBalanced();</span> |
| <span class="source-line-no">156</span><span id="line-156"></span> |
| <span class="source-line-no">157</span><span id="line-157"> // start two more region servers - total of 4</span> |
| <span class="source-line-no">158</span><span id="line-158"> LOG.info("Readding third server="</span> |
| <span class="source-line-no">159</span><span id="line-159"> + UTIL.getHBaseCluster().startRegionServer().getRegionServer().getServerName());</span> |
| <span class="source-line-no">160</span><span id="line-160"> LOG.info("Added fourth server="</span> |
| <span class="source-line-no">161</span><span id="line-161"> + UTIL.getHBaseCluster().startRegionServer().getRegionServer().getServerName());</span> |
| <span class="source-line-no">162</span><span id="line-162"> waitOnCrashProcessing();</span> |
| <span class="source-line-no">163</span><span id="line-163"> waitForAllRegionsAssigned();</span> |
| <span class="source-line-no">164</span><span id="line-164"></span> |
| <span class="source-line-no">165</span><span id="line-165"> response = UTIL.getHBaseCluster().getMaster().balance();</span> |
| <span class="source-line-no">166</span><span id="line-166"> assertTrue(response.isBalancerRan());</span> |
| <span class="source-line-no">167</span><span id="line-167"> assertTrue(response.getMovesCalculated() > 0);</span> |
| <span class="source-line-no">168</span><span id="line-168"> assertEquals(response.getMovesCalculated(), response.getMovesExecuted());</span> |
| <span class="source-line-no">169</span><span id="line-169"></span> |
| <span class="source-line-no">170</span><span id="line-170"> assertRegionsAreBalanced();</span> |
| <span class="source-line-no">171</span><span id="line-171"> for (int i = 0; i < 6; i++) {</span> |
| <span class="source-line-no">172</span><span id="line-172"> LOG.info("Adding " + (i + 5) + "th region server");</span> |
| <span class="source-line-no">173</span><span id="line-173"> UTIL.getHBaseCluster().startRegionServer();</span> |
| <span class="source-line-no">174</span><span id="line-174"> }</span> |
| <span class="source-line-no">175</span><span id="line-175"> waitForAllRegionsAssigned();</span> |
| <span class="source-line-no">176</span><span id="line-176"></span> |
| <span class="source-line-no">177</span><span id="line-177"> response = UTIL.getHBaseCluster().getMaster().balance();</span> |
| <span class="source-line-no">178</span><span id="line-178"> assertTrue(response.isBalancerRan());</span> |
| <span class="source-line-no">179</span><span id="line-179"> assertTrue(response.getMovesCalculated() > 0);</span> |
| <span class="source-line-no">180</span><span id="line-180"> assertEquals(response.getMovesCalculated(), response.getMovesExecuted());</span> |
| <span class="source-line-no">181</span><span id="line-181"></span> |
| <span class="source-line-no">182</span><span id="line-182"> assertRegionsAreBalanced();</span> |
| <span class="source-line-no">183</span><span id="line-183"> regionLocator.close();</span> |
| <span class="source-line-no">184</span><span id="line-184"> }</span> |
| <span class="source-line-no">185</span><span id="line-185"> }</span> |
| <span class="source-line-no">186</span><span id="line-186"></span> |
| <span class="source-line-no">187</span><span id="line-187"> /**</span> |
| <span class="source-line-no">188</span><span id="line-188"> * Wait on crash processing. Balancer won't run if processing a crashed server.</span> |
| <span class="source-line-no">189</span><span id="line-189"> */</span> |
| <span class="source-line-no">190</span><span id="line-190"> private void waitOnCrashProcessing() throws IOException {</span> |
| <span class="source-line-no">191</span><span id="line-191"> while (UTIL.getHBaseCluster().getMaster().getServerManager().areDeadServersInProgress()) {</span> |
| <span class="source-line-no">192</span><span id="line-192"> LOG.info("Waiting on processing of crashed server before proceeding...");</span> |
| <span class="source-line-no">193</span><span id="line-193"> Threads.sleep(1000);</span> |
| <span class="source-line-no">194</span><span id="line-194"> }</span> |
| <span class="source-line-no">195</span><span id="line-195"> }</span> |
| <span class="source-line-no">196</span><span id="line-196"></span> |
| <span class="source-line-no">197</span><span id="line-197"> /**</span> |
| <span class="source-line-no">198</span><span id="line-198"> * Determine if regions are balanced. Figure out the total, divide by the number of online</span> |
| <span class="source-line-no">199</span><span id="line-199"> * servers, then test if each server is +/- 1 of average rounded up.</span> |
| <span class="source-line-no">200</span><span id="line-200"> */</span> |
| <span class="source-line-no">201</span><span id="line-201"> private void assertRegionsAreBalanced() throws IOException {</span> |
| <span class="source-line-no">202</span><span id="line-202"> // TODO: Fix this test. Old balancer used to run with 'slop'. New</span> |
| <span class="source-line-no">203</span><span id="line-203"> // balancer does not.</span> |
| <span class="source-line-no">204</span><span id="line-204"> boolean success = false;</span> |
| <span class="source-line-no">205</span><span id="line-205"> float slop = (float) UTIL.getConfiguration().getFloat("hbase.regions.slop", 0.1f);</span> |
| <span class="source-line-no">206</span><span id="line-206"> if (slop <= 0) slop = 1;</span> |
| <span class="source-line-no">207</span><span id="line-207"></span> |
| <span class="source-line-no">208</span><span id="line-208"> for (int i = 0; i < 5; i++) {</span> |
| <span class="source-line-no">209</span><span id="line-209"> success = true;</span> |
| <span class="source-line-no">210</span><span id="line-210"> // make sure all the regions are reassigned before we test balance</span> |
| <span class="source-line-no">211</span><span id="line-211"> waitForAllRegionsAssigned();</span> |
| <span class="source-line-no">212</span><span id="line-212"></span> |
| <span class="source-line-no">213</span><span id="line-213"> long regionCount = UTIL.getMiniHBaseCluster().countServedRegions();</span> |
| <span class="source-line-no">214</span><span id="line-214"> List<HRegionServer> servers = getOnlineRegionServers();</span> |
| <span class="source-line-no">215</span><span id="line-215"> double avg = (double) regionCount / (double) servers.size();</span> |
| <span class="source-line-no">216</span><span id="line-216"> int avgLoadPlusSlop = (int) Math.ceil(avg * (1 + slop));</span> |
| <span class="source-line-no">217</span><span id="line-217"> int avgLoadMinusSlop = (int) Math.floor(avg * (1 - slop)) - 1;</span> |
| <span class="source-line-no">218</span><span id="line-218"> // Increase the margin a little to accommodate StochasticLoadBalancer</span> |
| <span class="source-line-no">219</span><span id="line-219"> if (this.balancerName.contains("StochasticLoadBalancer")) {</span> |
| <span class="source-line-no">220</span><span id="line-220"> avgLoadPlusSlop++;</span> |
| <span class="source-line-no">221</span><span id="line-221"> avgLoadMinusSlop--;</span> |
| <span class="source-line-no">222</span><span id="line-222"> }</span> |
| <span class="source-line-no">223</span><span id="line-223"> LOG.debug("There are " + servers.size() + " servers and " + regionCount</span> |
| <span class="source-line-no">224</span><span id="line-224"> + " regions. Load Average: " + avg + " low border: " + avgLoadMinusSlop + ", up border: "</span> |
| <span class="source-line-no">225</span><span id="line-225"> + avgLoadPlusSlop + "; attempt: " + i);</span> |
| <span class="source-line-no">226</span><span id="line-226"></span> |
| <span class="source-line-no">227</span><span id="line-227"> for (HRegionServer server : servers) {</span> |
| <span class="source-line-no">228</span><span id="line-228"> int serverLoad = ProtobufUtil.getOnlineRegions(server.getRSRpcServices()).size();</span> |
| <span class="source-line-no">229</span><span id="line-229"> LOG.debug(server.getServerName() + " Avg: " + avg + " actual: " + serverLoad);</span> |
| <span class="source-line-no">230</span><span id="line-230"> if (!(avg > 2.0 && serverLoad <= avgLoadPlusSlop && serverLoad >= avgLoadMinusSlop)) {</span> |
| <span class="source-line-no">231</span><span id="line-231"> for (RegionInfo hri : ProtobufUtil.getOnlineRegions(server.getRSRpcServices())) {</span> |
| <span class="source-line-no">232</span><span id="line-232"> if (hri.isMetaRegion()) serverLoad--;</span> |
| <span class="source-line-no">233</span><span id="line-233"> // LOG.debug(hri.getRegionNameAsString());</span> |
| <span class="source-line-no">234</span><span id="line-234"> }</span> |
| <span class="source-line-no">235</span><span id="line-235"> if (!(serverLoad <= avgLoadPlusSlop && serverLoad >= avgLoadMinusSlop)) {</span> |
| <span class="source-line-no">236</span><span id="line-236"> LOG.debug(server.getServerName() + " Isn't balanced!!! Avg: " + avg + " actual: "</span> |
| <span class="source-line-no">237</span><span id="line-237"> + serverLoad + " slop: " + slop);</span> |
| <span class="source-line-no">238</span><span id="line-238"> success = false;</span> |
| <span class="source-line-no">239</span><span id="line-239"> break;</span> |
| <span class="source-line-no">240</span><span id="line-240"> }</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"> }</span> |
| <span class="source-line-no">243</span><span id="line-243"></span> |
| <span class="source-line-no">244</span><span id="line-244"> if (!success) {</span> |
| <span class="source-line-no">245</span><span id="line-245"> // one or more servers are not balanced. sleep a little to give it a</span> |
| <span class="source-line-no">246</span><span id="line-246"> // chance to catch up. then, go back to the retry loop.</span> |
| <span class="source-line-no">247</span><span id="line-247"> try {</span> |
| <span class="source-line-no">248</span><span id="line-248"> Thread.sleep(10000);</span> |
| <span class="source-line-no">249</span><span id="line-249"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"></span> |
| <span class="source-line-no">252</span><span id="line-252"> UTIL.getHBaseCluster().getMaster().balance();</span> |
| <span class="source-line-no">253</span><span id="line-253"> continue;</span> |
| <span class="source-line-no">254</span><span id="line-254"> }</span> |
| <span class="source-line-no">255</span><span id="line-255"></span> |
| <span class="source-line-no">256</span><span id="line-256"> // if we get here, all servers were balanced, so we should just return.</span> |
| <span class="source-line-no">257</span><span id="line-257"> return;</span> |
| <span class="source-line-no">258</span><span id="line-258"> }</span> |
| <span class="source-line-no">259</span><span id="line-259"> // if we get here, we tried 5 times and never got to short circuit out of</span> |
| <span class="source-line-no">260</span><span id="line-260"> // the retry loop, so this is a failure.</span> |
| <span class="source-line-no">261</span><span id="line-261"> fail("After 5 attempts, region assignments were not balanced.");</span> |
| <span class="source-line-no">262</span><span id="line-262"> }</span> |
| <span class="source-line-no">263</span><span id="line-263"></span> |
| <span class="source-line-no">264</span><span id="line-264"> private List<HRegionServer> getOnlineRegionServers() {</span> |
| <span class="source-line-no">265</span><span id="line-265"> List<HRegionServer> list = new ArrayList<>();</span> |
| <span class="source-line-no">266</span><span id="line-266"> for (JVMClusterUtil.RegionServerThread rst : UTIL.getHBaseCluster().getRegionServerThreads()) {</span> |
| <span class="source-line-no">267</span><span id="line-267"> if (rst.getRegionServer().isOnline()) {</span> |
| <span class="source-line-no">268</span><span id="line-268"> list.add(rst.getRegionServer());</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"> return list;</span> |
| <span class="source-line-no">272</span><span id="line-272"> }</span> |
| <span class="source-line-no">273</span><span id="line-273"></span> |
| <span class="source-line-no">274</span><span id="line-274"> /**</span> |
| <span class="source-line-no">275</span><span id="line-275"> * Wait until all the regions are assigned.</span> |
| <span class="source-line-no">276</span><span id="line-276"> */</span> |
| <span class="source-line-no">277</span><span id="line-277"> private void waitForAllRegionsAssigned() throws IOException {</span> |
| <span class="source-line-no">278</span><span id="line-278"> int totalRegions = HBaseTestingUtil.KEYS.length;</span> |
| <span class="source-line-no">279</span><span id="line-279"> try {</span> |
| <span class="source-line-no">280</span><span id="line-280"> Thread.sleep(200);</span> |
| <span class="source-line-no">281</span><span id="line-281"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">282</span><span id="line-282"> throw new InterruptedIOException();</span> |
| <span class="source-line-no">283</span><span id="line-283"> }</span> |
| <span class="source-line-no">284</span><span id="line-284"> while (UTIL.getMiniHBaseCluster().countServedRegions() < totalRegions) {</span> |
| <span class="source-line-no">285</span><span id="line-285"> // while (!cluster.getMaster().allRegionsAssigned()) {</span> |
| <span class="source-line-no">286</span><span id="line-286"> LOG.debug("Waiting for there to be " + totalRegions + " regions, but there are "</span> |
| <span class="source-line-no">287</span><span id="line-287"> + UTIL.getMiniHBaseCluster().countServedRegions() + " right now.");</span> |
| <span class="source-line-no">288</span><span id="line-288"> try {</span> |
| <span class="source-line-no">289</span><span id="line-289"> Thread.sleep(200);</span> |
| <span class="source-line-no">290</span><span id="line-290"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">291</span><span id="line-291"> throw new InterruptedIOException();</span> |
| <span class="source-line-no">292</span><span id="line-292"> }</span> |
| <span class="source-line-no">293</span><span id="line-293"> }</span> |
| <span class="source-line-no">294</span><span id="line-294"> UTIL.waitUntilNoRegionsInTransition();</span> |
| <span class="source-line-no">295</span><span id="line-295"> }</span> |
| <span class="source-line-no">296</span><span id="line-296"></span> |
| <span class="source-line-no">297</span><span id="line-297">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |