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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.master;</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.io.IOException;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.HBaseClassTestRule;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.HBaseTestingUtil;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.ServerName;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.Waiter;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.BalanceRequest;</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.RegionInfo;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.regionserver.HRegionServer;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.testclassification.MasterTests;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.testclassification.MediumTests;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.junit.After;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.junit.ClassRule;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.junit.Test;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.junit.experimental.categories.Category;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.mockito.Mockito;</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43">@Category({ MasterTests.class, MediumTests.class })</span> |
| <span class="source-line-no">044</span><span id="line-44">public class TestMasterDryRunBalancer {</span> |
| <span class="source-line-no">045</span><span id="line-45"> @ClassRule</span> |
| <span class="source-line-no">046</span><span id="line-46"> public static final HBaseClassTestRule CLASS_RULE =</span> |
| <span class="source-line-no">047</span><span id="line-47"> HBaseClassTestRule.forClass(TestMasterDryRunBalancer.class);</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49"> private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();</span> |
| <span class="source-line-no">050</span><span id="line-50"> private static final byte[] FAMILYNAME = Bytes.toBytes("fam");</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> @After</span> |
| <span class="source-line-no">053</span><span id="line-53"> public void shutdown() throws Exception {</span> |
| <span class="source-line-no">054</span><span id="line-54"> TEST_UTIL.shutdownMiniCluster();</span> |
| <span class="source-line-no">055</span><span id="line-55"> }</span> |
| <span class="source-line-no">056</span><span id="line-56"></span> |
| <span class="source-line-no">057</span><span id="line-57"> @Test</span> |
| <span class="source-line-no">058</span><span id="line-58"> public void testDryRunBalancer() throws Exception {</span> |
| <span class="source-line-no">059</span><span id="line-59"> TEST_UTIL.startMiniCluster(2);</span> |
| <span class="source-line-no">060</span><span id="line-60"></span> |
| <span class="source-line-no">061</span><span id="line-61"> int numRegions = 100;</span> |
| <span class="source-line-no">062</span><span id="line-62"> int regionsPerRs = numRegions / 2;</span> |
| <span class="source-line-no">063</span><span id="line-63"> TableName tableName = createTable("testDryRunBalancer", numRegions);</span> |
| <span class="source-line-no">064</span><span id="line-64"> HMaster master = Mockito.spy(TEST_UTIL.getHBaseCluster().getMaster());</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66"> // dry run should be possible with balancer disabled</span> |
| <span class="source-line-no">067</span><span id="line-67"> // disabling it will ensure the chore does not mess with our forced unbalance below</span> |
| <span class="source-line-no">068</span><span id="line-68"> master.balanceSwitch(false);</span> |
| <span class="source-line-no">069</span><span id="line-69"> assertFalse(master.isBalancerOn());</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> HRegionServer biasedServer = unbalance(master, tableName);</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> BalanceResponse response = master.balance(BalanceRequest.newBuilder().setDryRun(true).build());</span> |
| <span class="source-line-no">074</span><span id="line-74"> assertTrue(response.isBalancerRan());</span> |
| <span class="source-line-no">075</span><span id="line-75"> // we don't know for sure that it will be exactly half the regions</span> |
| <span class="source-line-no">076</span><span id="line-76"> assertTrue(response.getMovesCalculated() >= (regionsPerRs - 1)</span> |
| <span class="source-line-no">077</span><span id="line-77"> && response.getMovesCalculated() <= (regionsPerRs + 1));</span> |
| <span class="source-line-no">078</span><span id="line-78"> // but we expect no moves executed due to dry run</span> |
| <span class="source-line-no">079</span><span id="line-79"> assertEquals(0, response.getMovesExecuted());</span> |
| <span class="source-line-no">080</span><span id="line-80"></span> |
| <span class="source-line-no">081</span><span id="line-81"> // sanity check that we truly don't try to execute any plans</span> |
| <span class="source-line-no">082</span><span id="line-82"> Mockito.verify(master, Mockito.never()).executeRegionPlansWithThrottling(Mockito.anyList());</span> |
| <span class="source-line-no">083</span><span id="line-83"></span> |
| <span class="source-line-no">084</span><span id="line-84"> // should still be unbalanced post dry run</span> |
| <span class="source-line-no">085</span><span id="line-85"> assertServerContainsAllRegions(biasedServer.getServerName(), tableName);</span> |
| <span class="source-line-no">086</span><span id="line-86"></span> |
| <span class="source-line-no">087</span><span id="line-87"> TEST_UTIL.deleteTable(tableName);</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"> private TableName createTable(String table, int numRegions) throws IOException {</span> |
| <span class="source-line-no">091</span><span id="line-91"> TableName tableName = TableName.valueOf(table);</span> |
| <span class="source-line-no">092</span><span id="line-92"> TEST_UTIL.createMultiRegionTable(tableName, FAMILYNAME, numRegions);</span> |
| <span class="source-line-no">093</span><span id="line-93"> return tableName;</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"> private HRegionServer unbalance(HMaster master, TableName tableName) throws Exception {</span> |
| <span class="source-line-no">097</span><span id="line-97"> waitForRegionsToSettle(master);</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> HRegionServer biasedServer = TEST_UTIL.getMiniHBaseCluster().getRegionServer(0);</span> |
| <span class="source-line-no">100</span><span id="line-100"></span> |
| <span class="source-line-no">101</span><span id="line-101"> for (RegionInfo regionInfo : TEST_UTIL.getAdmin().getRegions(tableName)) {</span> |
| <span class="source-line-no">102</span><span id="line-102"> master.move(regionInfo.getEncodedNameAsBytes(),</span> |
| <span class="source-line-no">103</span><span id="line-103"> Bytes.toBytes(biasedServer.getServerName().getServerName()));</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"> waitForRegionsToSettle(master);</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> assertServerContainsAllRegions(biasedServer.getServerName(), tableName);</span> |
| <span class="source-line-no">109</span><span id="line-109"></span> |
| <span class="source-line-no">110</span><span id="line-110"> return biasedServer;</span> |
| <span class="source-line-no">111</span><span id="line-111"> }</span> |
| <span class="source-line-no">112</span><span id="line-112"></span> |
| <span class="source-line-no">113</span><span id="line-113"> private void assertServerContainsAllRegions(ServerName serverName, TableName tableName)</span> |
| <span class="source-line-no">114</span><span id="line-114"> throws IOException {</span> |
| <span class="source-line-no">115</span><span id="line-115"> int numRegions = TEST_UTIL.getAdmin().getRegions(tableName).size();</span> |
| <span class="source-line-no">116</span><span id="line-116"> assertEquals(numRegions,</span> |
| <span class="source-line-no">117</span><span id="line-117"> TEST_UTIL.getMiniHBaseCluster().getRegionServer(serverName).getRegions(tableName).size());</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"> private void waitForRegionsToSettle(HMaster master) {</span> |
| <span class="source-line-no">121</span><span id="line-121"> Waiter.waitFor(TEST_UTIL.getConfiguration(), 60_000,</span> |
| <span class="source-line-no">122</span><span id="line-122"> () -> master.getAssignmentManager().getRegionStates().getRegionsInTransitionCount() <= 0);</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> |
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| </pre> |
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