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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.rsgroup;</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 edu.umd.cs.findbugs.annotations.NonNull;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.ArrayList;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.Collections;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.HashMap;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.List;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.Map;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.Set;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.TreeMap;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.stream.Collectors;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.ClusterMetrics;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.HBaseIOException;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.HConstants;</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.client.RegionInfo;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.constraint.ConstraintException;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.favored.FavoredNodesManager;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.favored.FavoredNodesPromoter;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.master.LoadBalancer;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.master.MasterServices;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.master.RegionPlan;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.master.balancer.ClusterInfoProvider;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.master.balancer.LoadBalancerFactory;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.hbase.master.balancer.MasterClusterInfoProvider;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.hbase.net.Address;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.hadoop.hbase.util.Pair;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.hadoop.hbase.util.ReflectionUtils;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.slf4j.Logger;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53">import org.apache.hbase.thirdparty.com.google.common.collect.ArrayListMultimap;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.apache.hbase.thirdparty.com.google.common.collect.ListMultimap;</span> |
| <span class="source-line-no">055</span><span id="line-55">import org.apache.hbase.thirdparty.com.google.common.collect.Lists;</span> |
| <span class="source-line-no">056</span><span id="line-56">import org.apache.hbase.thirdparty.com.google.common.collect.Maps;</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"> * GroupBasedLoadBalancer, used when Region Server Grouping is configured (HBase-6721) It does</span> |
| <span class="source-line-no">060</span><span id="line-60"> * region balance based on a table's group membership.</span> |
| <span class="source-line-no">061</span><span id="line-61"> * <p/></span> |
| <span class="source-line-no">062</span><span id="line-62"> * Most assignment methods contain two exclusive code paths: Online - when the group table is online</span> |
| <span class="source-line-no">063</span><span id="line-63"> * and Offline - when it is unavailable.</span> |
| <span class="source-line-no">064</span><span id="line-64"> * <p/></span> |
| <span class="source-line-no">065</span><span id="line-65"> * During Offline, assignments are assigned based on cached information in zookeeper. If unavailable</span> |
| <span class="source-line-no">066</span><span id="line-66"> * (ie bootstrap) then regions are assigned randomly.</span> |
| <span class="source-line-no">067</span><span id="line-67"> * <p/></span> |
| <span class="source-line-no">068</span><span id="line-68"> * Once the GROUP table has been assigned, the balancer switches to Online and will then start</span> |
| <span class="source-line-no">069</span><span id="line-69"> * providing appropriate assignments for user tables.</span> |
| <span class="source-line-no">070</span><span id="line-70"> */</span> |
| <span class="source-line-no">071</span><span id="line-71">@InterfaceAudience.Private</span> |
| <span class="source-line-no">072</span><span id="line-72">public class RSGroupBasedLoadBalancer implements LoadBalancer {</span> |
| <span class="source-line-no">073</span><span id="line-73"> private static final Logger LOG = LoggerFactory.getLogger(RSGroupBasedLoadBalancer.class);</span> |
| <span class="source-line-no">074</span><span id="line-74"></span> |
| <span class="source-line-no">075</span><span id="line-75"> private MasterServices masterServices;</span> |
| <span class="source-line-no">076</span><span id="line-76"> private ClusterInfoProvider provider;</span> |
| <span class="source-line-no">077</span><span id="line-77"> private FavoredNodesManager favoredNodesManager;</span> |
| <span class="source-line-no">078</span><span id="line-78"> private volatile RSGroupInfoManager rsGroupInfoManager;</span> |
| <span class="source-line-no">079</span><span id="line-79"> private volatile LoadBalancer internalBalancer;</span> |
| <span class="source-line-no">080</span><span id="line-80"></span> |
| <span class="source-line-no">081</span><span id="line-81"> /**</span> |
| <span class="source-line-no">082</span><span id="line-82"> * Set this key to {@code true} to allow region fallback. Fallback to the default rsgroup first,</span> |
| <span class="source-line-no">083</span><span id="line-83"> * then fallback to any group if no online servers in default rsgroup. Please keep balancer switch</span> |
| <span class="source-line-no">084</span><span id="line-84"> * on at the same time, which is relied on to correct misplaced regions</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 static final String FALLBACK_GROUP_ENABLE_KEY = "hbase.rsgroup.fallback.enable";</span> |
| <span class="source-line-no">087</span><span id="line-87"></span> |
| <span class="source-line-no">088</span><span id="line-88"> private volatile boolean fallbackEnabled = false;</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"> * Used by reflection in {@link org.apache.hadoop.hbase.master.balancer.LoadBalancerFactory}.</span> |
| <span class="source-line-no">092</span><span id="line-92"> */</span> |
| <span class="source-line-no">093</span><span id="line-93"> @InterfaceAudience.Private</span> |
| <span class="source-line-no">094</span><span id="line-94"> public RSGroupBasedLoadBalancer() {</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"> // must be called after calling initialize</span> |
| <span class="source-line-no">098</span><span id="line-98"> @Override</span> |
| <span class="source-line-no">099</span><span id="line-99"> public synchronized void updateClusterMetrics(ClusterMetrics sm) {</span> |
| <span class="source-line-no">100</span><span id="line-100"> assert internalBalancer != null;</span> |
| <span class="source-line-no">101</span><span id="line-101"> internalBalancer.updateClusterMetrics(sm);</span> |
| <span class="source-line-no">102</span><span id="line-102"> }</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> @Override</span> |
| <span class="source-line-no">105</span><span id="line-105"> public synchronized void</span> |
| <span class="source-line-no">106</span><span id="line-106"> updateBalancerLoadInfo(Map<TableName, Map<ServerName, List<RegionInfo>>> loadOfAllTable) {</span> |
| <span class="source-line-no">107</span><span id="line-107"> internalBalancer.updateBalancerLoadInfo(loadOfAllTable);</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"> public void setMasterServices(MasterServices masterServices) {</span> |
| <span class="source-line-no">111</span><span id="line-111"> this.masterServices = masterServices;</span> |
| <span class="source-line-no">112</span><span id="line-112"> }</span> |
| <span class="source-line-no">113</span><span id="line-113"></span> |
| <span class="source-line-no">114</span><span id="line-114"> /**</span> |
| <span class="source-line-no">115</span><span id="line-115"> * Balance by RSGroup.</span> |
| <span class="source-line-no">116</span><span id="line-116"> */</span> |
| <span class="source-line-no">117</span><span id="line-117"> @Override</span> |
| <span class="source-line-no">118</span><span id="line-118"> public synchronized List<RegionPlan> balanceCluster(</span> |
| <span class="source-line-no">119</span><span id="line-119"> Map<TableName, Map<ServerName, List<RegionInfo>>> loadOfAllTable) throws IOException {</span> |
| <span class="source-line-no">120</span><span id="line-120"> if (!isOnline()) {</span> |
| <span class="source-line-no">121</span><span id="line-121"> throw new ConstraintException(</span> |
| <span class="source-line-no">122</span><span id="line-122"> RSGroupInfoManager.class.getSimpleName() + " is not online, unable to perform balance");</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"> // Calculate correct assignments and a list of RegionPlan for mis-placed regions</span> |
| <span class="source-line-no">126</span><span id="line-126"> Pair<Map<TableName, Map<ServerName, List<RegionInfo>>>,</span> |
| <span class="source-line-no">127</span><span id="line-127"> List<RegionPlan>> correctedStateAndRegionPlans = correctAssignments(loadOfAllTable);</span> |
| <span class="source-line-no">128</span><span id="line-128"> Map<TableName, Map<ServerName, List<RegionInfo>>> correctedLoadOfAllTable =</span> |
| <span class="source-line-no">129</span><span id="line-129"> correctedStateAndRegionPlans.getFirst();</span> |
| <span class="source-line-no">130</span><span id="line-130"> List<RegionPlan> regionPlans = correctedStateAndRegionPlans.getSecond();</span> |
| <span class="source-line-no">131</span><span id="line-131"> RSGroupInfo defaultInfo = rsGroupInfoManager.getRSGroup(RSGroupInfo.DEFAULT_GROUP);</span> |
| <span class="source-line-no">132</span><span id="line-132"> // Add RegionPlan</span> |
| <span class="source-line-no">133</span><span id="line-133"> // for the regions which have been placed according to the region server group assignment</span> |
| <span class="source-line-no">134</span><span id="line-134"> // into the movement list</span> |
| <span class="source-line-no">135</span><span id="line-135"> try {</span> |
| <span class="source-line-no">136</span><span id="line-136"> // For each rsgroup</span> |
| <span class="source-line-no">137</span><span id="line-137"> for (RSGroupInfo rsgroup : rsGroupInfoManager.listRSGroups()) {</span> |
| <span class="source-line-no">138</span><span id="line-138"> LOG.debug("Balancing RSGroup={}", rsgroup.getName());</span> |
| <span class="source-line-no">139</span><span id="line-139"> Map<TableName, Map<ServerName, List<RegionInfo>>> loadOfTablesInGroup = new HashMap<>();</span> |
| <span class="source-line-no">140</span><span id="line-140"> for (Map.Entry<TableName, Map<ServerName, List<RegionInfo>>> entry : correctedLoadOfAllTable</span> |
| <span class="source-line-no">141</span><span id="line-141"> .entrySet()) {</span> |
| <span class="source-line-no">142</span><span id="line-142"> TableName tableName = entry.getKey();</span> |
| <span class="source-line-no">143</span><span id="line-143"> RSGroupInfo targetRSGInfo = RSGroupUtil</span> |
| <span class="source-line-no">144</span><span id="line-144"> .getRSGroupInfo(masterServices, rsGroupInfoManager, tableName).orElse(defaultInfo);</span> |
| <span class="source-line-no">145</span><span id="line-145"> if (targetRSGInfo.getName().equals(rsgroup.getName())) {</span> |
| <span class="source-line-no">146</span><span id="line-146"> loadOfTablesInGroup.put(tableName, entry.getValue());</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"> List<RegionPlan> groupPlans = null;</span> |
| <span class="source-line-no">150</span><span id="line-150"> if (!loadOfTablesInGroup.isEmpty()) {</span> |
| <span class="source-line-no">151</span><span id="line-151"> LOG.info("Start Generate Balance plan for group: " + rsgroup.getName());</span> |
| <span class="source-line-no">152</span><span id="line-152"> groupPlans = this.internalBalancer.balanceCluster(loadOfTablesInGroup);</span> |
| <span class="source-line-no">153</span><span id="line-153"> }</span> |
| <span class="source-line-no">154</span><span id="line-154"> if (groupPlans != null) {</span> |
| <span class="source-line-no">155</span><span id="line-155"> regionPlans.addAll(groupPlans);</span> |
| <span class="source-line-no">156</span><span id="line-156"> }</span> |
| <span class="source-line-no">157</span><span id="line-157"> }</span> |
| <span class="source-line-no">158</span><span id="line-158"> } catch (IOException exp) {</span> |
| <span class="source-line-no">159</span><span id="line-159"> LOG.warn("Exception while balancing cluster.", exp);</span> |
| <span class="source-line-no">160</span><span id="line-160"> regionPlans.clear();</span> |
| <span class="source-line-no">161</span><span id="line-161"> }</span> |
| <span class="source-line-no">162</span><span id="line-162"></span> |
| <span class="source-line-no">163</span><span id="line-163"> // Return the whole movement list</span> |
| <span class="source-line-no">164</span><span id="line-164"> return regionPlans;</span> |
| <span class="source-line-no">165</span><span id="line-165"> }</span> |
| <span class="source-line-no">166</span><span id="line-166"></span> |
| <span class="source-line-no">167</span><span id="line-167"> @Override</span> |
| <span class="source-line-no">168</span><span id="line-168"> @NonNull</span> |
| <span class="source-line-no">169</span><span id="line-169"> public Map<ServerName, List<RegionInfo>> roundRobinAssignment(List<RegionInfo> regions,</span> |
| <span class="source-line-no">170</span><span id="line-170"> List<ServerName> servers) throws IOException {</span> |
| <span class="source-line-no">171</span><span id="line-171"> Map<ServerName, List<RegionInfo>> assignments = Maps.newHashMap();</span> |
| <span class="source-line-no">172</span><span id="line-172"> List<Pair<List<RegionInfo>, List<ServerName>>> pairs =</span> |
| <span class="source-line-no">173</span><span id="line-173"> generateGroupAssignments(regions, servers);</span> |
| <span class="source-line-no">174</span><span id="line-174"> for (Pair<List<RegionInfo>, List<ServerName>> pair : pairs) {</span> |
| <span class="source-line-no">175</span><span id="line-175"> Map<ServerName, List<RegionInfo>> result =</span> |
| <span class="source-line-no">176</span><span id="line-176"> this.internalBalancer.roundRobinAssignment(pair.getFirst(), pair.getSecond());</span> |
| <span class="source-line-no">177</span><span id="line-177"> result.forEach((server, regionInfos) -> assignments</span> |
| <span class="source-line-no">178</span><span id="line-178"> .computeIfAbsent(server, s -> Lists.newArrayList()).addAll(regionInfos));</span> |
| <span class="source-line-no">179</span><span id="line-179"> }</span> |
| <span class="source-line-no">180</span><span id="line-180"> return assignments;</span> |
| <span class="source-line-no">181</span><span id="line-181"> }</span> |
| <span class="source-line-no">182</span><span id="line-182"></span> |
| <span class="source-line-no">183</span><span id="line-183"> @Override</span> |
| <span class="source-line-no">184</span><span id="line-184"> @NonNull</span> |
| <span class="source-line-no">185</span><span id="line-185"> public Map<ServerName, List<RegionInfo>> retainAssignment(Map<RegionInfo, ServerName> regions,</span> |
| <span class="source-line-no">186</span><span id="line-186"> List<ServerName> servers) throws HBaseIOException {</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"> Map<ServerName, List<RegionInfo>> assignments = new TreeMap<>();</span> |
| <span class="source-line-no">189</span><span id="line-189"> List<Pair<List<RegionInfo>, List<ServerName>>> pairs =</span> |
| <span class="source-line-no">190</span><span id="line-190"> generateGroupAssignments(Lists.newArrayList(regions.keySet()), servers);</span> |
| <span class="source-line-no">191</span><span id="line-191"> for (Pair<List<RegionInfo>, List<ServerName>> pair : pairs) {</span> |
| <span class="source-line-no">192</span><span id="line-192"> List<RegionInfo> regionList = pair.getFirst();</span> |
| <span class="source-line-no">193</span><span id="line-193"> Map<RegionInfo, ServerName> currentAssignmentMap = Maps.newTreeMap();</span> |
| <span class="source-line-no">194</span><span id="line-194"> regionList.forEach(r -> currentAssignmentMap.put(r, regions.get(r)));</span> |
| <span class="source-line-no">195</span><span id="line-195"> Map<ServerName, List<RegionInfo>> pairResult =</span> |
| <span class="source-line-no">196</span><span id="line-196"> this.internalBalancer.retainAssignment(currentAssignmentMap, pair.getSecond());</span> |
| <span class="source-line-no">197</span><span id="line-197"> pairResult.forEach((server, rs) -> assignments</span> |
| <span class="source-line-no">198</span><span id="line-198"> .computeIfAbsent(server, s -> Lists.newArrayList()).addAll(rs));</span> |
| <span class="source-line-no">199</span><span id="line-199"> }</span> |
| <span class="source-line-no">200</span><span id="line-200"> return assignments;</span> |
| <span class="source-line-no">201</span><span id="line-201"> } catch (IOException e) {</span> |
| <span class="source-line-no">202</span><span id="line-202"> throw new HBaseIOException("Failed to do online retain assignment", e);</span> |
| <span class="source-line-no">203</span><span id="line-203"> }</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"> @Override</span> |
| <span class="source-line-no">207</span><span id="line-207"> public ServerName randomAssignment(RegionInfo region, List<ServerName> servers)</span> |
| <span class="source-line-no">208</span><span id="line-208"> throws IOException {</span> |
| <span class="source-line-no">209</span><span id="line-209"> List<Pair<List<RegionInfo>, List<ServerName>>> pairs =</span> |
| <span class="source-line-no">210</span><span id="line-210"> generateGroupAssignments(Lists.newArrayList(region), servers);</span> |
| <span class="source-line-no">211</span><span id="line-211"> List<ServerName> filteredServers = pairs.iterator().next().getSecond();</span> |
| <span class="source-line-no">212</span><span id="line-212"> return this.internalBalancer.randomAssignment(region, filteredServers);</span> |
| <span class="source-line-no">213</span><span id="line-213"> }</span> |
| <span class="source-line-no">214</span><span id="line-214"></span> |
| <span class="source-line-no">215</span><span id="line-215"> private List<Pair<List<RegionInfo>, List<ServerName>>> generateGroupAssignments(</span> |
| <span class="source-line-no">216</span><span id="line-216"> List<RegionInfo> regions, List<ServerName> servers) throws HBaseIOException {</span> |
| <span class="source-line-no">217</span><span id="line-217"> try {</span> |
| <span class="source-line-no">218</span><span id="line-218"> ListMultimap<String, RegionInfo> regionMap = ArrayListMultimap.create();</span> |
| <span class="source-line-no">219</span><span id="line-219"> ListMultimap<String, ServerName> serverMap = ArrayListMultimap.create();</span> |
| <span class="source-line-no">220</span><span id="line-220"> RSGroupInfo defaultInfo = rsGroupInfoManager.getRSGroup(RSGroupInfo.DEFAULT_GROUP);</span> |
| <span class="source-line-no">221</span><span id="line-221"> for (RegionInfo region : regions) {</span> |
| <span class="source-line-no">222</span><span id="line-222"> String groupName =</span> |
| <span class="source-line-no">223</span><span id="line-223"> RSGroupUtil.getRSGroupInfo(masterServices, rsGroupInfoManager, region.getTable())</span> |
| <span class="source-line-no">224</span><span id="line-224"> .orElse(defaultInfo).getName();</span> |
| <span class="source-line-no">225</span><span id="line-225"> regionMap.put(groupName, region);</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 (String groupKey : regionMap.keySet()) {</span> |
| <span class="source-line-no">228</span><span id="line-228"> RSGroupInfo info = rsGroupInfoManager.getRSGroup(groupKey);</span> |
| <span class="source-line-no">229</span><span id="line-229"> serverMap.putAll(groupKey, filterOfflineServers(info, servers));</span> |
| <span class="source-line-no">230</span><span id="line-230"> }</span> |
| <span class="source-line-no">231</span><span id="line-231"></span> |
| <span class="source-line-no">232</span><span id="line-232"> List<Pair<List<RegionInfo>, List<ServerName>>> result = Lists.newArrayList();</span> |
| <span class="source-line-no">233</span><span id="line-233"> List<RegionInfo> fallbackRegions = Lists.newArrayList();</span> |
| <span class="source-line-no">234</span><span id="line-234"> for (String groupKey : regionMap.keySet()) {</span> |
| <span class="source-line-no">235</span><span id="line-235"> if (serverMap.get(groupKey).isEmpty()) {</span> |
| <span class="source-line-no">236</span><span id="line-236"> fallbackRegions.addAll(regionMap.get(groupKey));</span> |
| <span class="source-line-no">237</span><span id="line-237"> } else {</span> |
| <span class="source-line-no">238</span><span id="line-238"> result.add(Pair.newPair(regionMap.get(groupKey), serverMap.get(groupKey)));</span> |
| <span class="source-line-no">239</span><span id="line-239"> }</span> |
| <span class="source-line-no">240</span><span id="line-240"> }</span> |
| <span class="source-line-no">241</span><span id="line-241"> if (!fallbackRegions.isEmpty()) {</span> |
| <span class="source-line-no">242</span><span id="line-242"> List<ServerName> candidates = null;</span> |
| <span class="source-line-no">243</span><span id="line-243"> if (isFallbackEnabled()) {</span> |
| <span class="source-line-no">244</span><span id="line-244"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">245</span><span id="line-245"> LOG.debug("Falling back {} regions to servers outside their RSGroup. Regions: {}",</span> |
| <span class="source-line-no">246</span><span id="line-246"> fallbackRegions.size(), fallbackRegions.stream()</span> |
| <span class="source-line-no">247</span><span id="line-247"> .map(RegionInfo::getRegionNameAsString).collect(Collectors.toSet()));</span> |
| <span class="source-line-no">248</span><span id="line-248"> }</span> |
| <span class="source-line-no">249</span><span id="line-249"> candidates = getFallBackCandidates(servers);</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"> candidates = (candidates == null || candidates.isEmpty())</span> |
| <span class="source-line-no">252</span><span id="line-252"> ? Lists.newArrayList(BOGUS_SERVER_NAME)</span> |
| <span class="source-line-no">253</span><span id="line-253"> : candidates;</span> |
| <span class="source-line-no">254</span><span id="line-254"> result.add(Pair.newPair(fallbackRegions, candidates));</span> |
| <span class="source-line-no">255</span><span id="line-255"> }</span> |
| <span class="source-line-no">256</span><span id="line-256"> return result;</span> |
| <span class="source-line-no">257</span><span id="line-257"> } catch (IOException e) {</span> |
| <span class="source-line-no">258</span><span id="line-258"> throw new HBaseIOException("Failed to generate group assignments", e);</span> |
| <span class="source-line-no">259</span><span id="line-259"> }</span> |
| <span class="source-line-no">260</span><span id="line-260"> }</span> |
| <span class="source-line-no">261</span><span id="line-261"></span> |
| <span class="source-line-no">262</span><span id="line-262"> private List<ServerName> filterOfflineServers(RSGroupInfo RSGroupInfo,</span> |
| <span class="source-line-no">263</span><span id="line-263"> List<ServerName> onlineServers) {</span> |
| <span class="source-line-no">264</span><span id="line-264"> if (RSGroupInfo != null) {</span> |
| <span class="source-line-no">265</span><span id="line-265"> return filterServers(RSGroupInfo.getServers(), onlineServers);</span> |
| <span class="source-line-no">266</span><span id="line-266"> } else {</span> |
| <span class="source-line-no">267</span><span id="line-267"> LOG.warn("RSGroup Information found to be null. Some regions might be unassigned.");</span> |
| <span class="source-line-no">268</span><span id="line-268"> return Collections.emptyList();</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"></span> |
| <span class="source-line-no">272</span><span id="line-272"> /**</span> |
| <span class="source-line-no">273</span><span id="line-273"> * Filter servers based on the online servers.</span> |
| <span class="source-line-no">274</span><span id="line-274"> * <p/></span> |
| <span class="source-line-no">275</span><span id="line-275"> * servers is actually a TreeSet (see {@link org.apache.hadoop.hbase.rsgroup.RSGroupInfo}), having</span> |
| <span class="source-line-no">276</span><span id="line-276"> * its contains()'s time complexity as O(logn), which is good enough.</span> |
| <span class="source-line-no">277</span><span id="line-277"> * <p/></span> |
| <span class="source-line-no">278</span><span id="line-278"> * TODO: consider using HashSet to pursue O(1) for contains() throughout the calling chain if</span> |
| <span class="source-line-no">279</span><span id="line-279"> * needed.</span> |
| <span class="source-line-no">280</span><span id="line-280"> * @param servers the servers</span> |
| <span class="source-line-no">281</span><span id="line-281"> * @param onlineServers List of servers which are online.</span> |
| <span class="source-line-no">282</span><span id="line-282"> * @return the list</span> |
| <span class="source-line-no">283</span><span id="line-283"> */</span> |
| <span class="source-line-no">284</span><span id="line-284"> private List<ServerName> filterServers(Set<Address> servers, List<ServerName> onlineServers) {</span> |
| <span class="source-line-no">285</span><span id="line-285"> ArrayList<ServerName> finalList = new ArrayList<>();</span> |
| <span class="source-line-no">286</span><span id="line-286"> for (ServerName onlineServer : onlineServers) {</span> |
| <span class="source-line-no">287</span><span id="line-287"> if (servers.contains(onlineServer.getAddress())) {</span> |
| <span class="source-line-no">288</span><span id="line-288"> finalList.add(onlineServer);</span> |
| <span class="source-line-no">289</span><span id="line-289"> }</span> |
| <span class="source-line-no">290</span><span id="line-290"> }</span> |
| <span class="source-line-no">291</span><span id="line-291"> return finalList;</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"> private Pair<Map<TableName, Map<ServerName, List<RegionInfo>>>, List<RegionPlan>></span> |
| <span class="source-line-no">295</span><span id="line-295"> correctAssignments(Map<TableName, Map<ServerName, List<RegionInfo>>> existingAssignments)</span> |
| <span class="source-line-no">296</span><span id="line-296"> throws IOException {</span> |
| <span class="source-line-no">297</span><span id="line-297"> // To return</span> |
| <span class="source-line-no">298</span><span id="line-298"> Map<TableName, Map<ServerName, List<RegionInfo>>> correctAssignments = new HashMap<>();</span> |
| <span class="source-line-no">299</span><span id="line-299"> List<RegionPlan> regionPlansForMisplacedRegions = new ArrayList<>();</span> |
| <span class="source-line-no">300</span><span id="line-300"> RSGroupInfo defaultInfo = rsGroupInfoManager.getRSGroup(RSGroupInfo.DEFAULT_GROUP);</span> |
| <span class="source-line-no">301</span><span id="line-301"> for (Map.Entry<TableName, Map<ServerName, List<RegionInfo>>> assignments : existingAssignments</span> |
| <span class="source-line-no">302</span><span id="line-302"> .entrySet()) {</span> |
| <span class="source-line-no">303</span><span id="line-303"> TableName tableName = assignments.getKey();</span> |
| <span class="source-line-no">304</span><span id="line-304"> Map<ServerName, List<RegionInfo>> clusterLoad = assignments.getValue();</span> |
| <span class="source-line-no">305</span><span id="line-305"> RSGroupInfo targetRSGInfo = null;</span> |
| <span class="source-line-no">306</span><span id="line-306"> Map<ServerName, List<RegionInfo>> correctServerRegion = new TreeMap<>();</span> |
| <span class="source-line-no">307</span><span id="line-307"> try {</span> |
| <span class="source-line-no">308</span><span id="line-308"> targetRSGInfo = RSGroupUtil.getRSGroupInfo(masterServices, rsGroupInfoManager, tableName)</span> |
| <span class="source-line-no">309</span><span id="line-309"> .orElse(defaultInfo);</span> |
| <span class="source-line-no">310</span><span id="line-310"> } catch (IOException exp) {</span> |
| <span class="source-line-no">311</span><span id="line-311"> LOG.debug("RSGroup information null for region of table " + tableName, exp);</span> |
| <span class="source-line-no">312</span><span id="line-312"> }</span> |
| <span class="source-line-no">313</span><span id="line-313"> for (Map.Entry<ServerName, List<RegionInfo>> serverRegionMap : clusterLoad.entrySet()) {</span> |
| <span class="source-line-no">314</span><span id="line-314"> ServerName currentHostServer = serverRegionMap.getKey();</span> |
| <span class="source-line-no">315</span><span id="line-315"> List<RegionInfo> regionInfoList = serverRegionMap.getValue();</span> |
| <span class="source-line-no">316</span><span id="line-316"> if (</span> |
| <span class="source-line-no">317</span><span id="line-317"> targetRSGInfo == null || !targetRSGInfo.containsServer(currentHostServer.getAddress())</span> |
| <span class="source-line-no">318</span><span id="line-318"> ) {</span> |
| <span class="source-line-no">319</span><span id="line-319"> regionInfoList.forEach(regionInfo -> {</span> |
| <span class="source-line-no">320</span><span id="line-320"> regionPlansForMisplacedRegions.add(new RegionPlan(regionInfo, currentHostServer, null));</span> |
| <span class="source-line-no">321</span><span id="line-321"> });</span> |
| <span class="source-line-no">322</span><span id="line-322"> } else {</span> |
| <span class="source-line-no">323</span><span id="line-323"> correctServerRegion.put(currentHostServer, regionInfoList);</span> |
| <span class="source-line-no">324</span><span id="line-324"> }</span> |
| <span class="source-line-no">325</span><span id="line-325"> }</span> |
| <span class="source-line-no">326</span><span id="line-326"> correctAssignments.put(tableName, correctServerRegion);</span> |
| <span class="source-line-no">327</span><span id="line-327"> }</span> |
| <span class="source-line-no">328</span><span id="line-328"></span> |
| <span class="source-line-no">329</span><span id="line-329"> // Return correct assignments and region movement plan for mis-placed regions together</span> |
| <span class="source-line-no">330</span><span id="line-330"> return new Pair<Map<TableName, Map<ServerName, List<RegionInfo>>>, List<RegionPlan>>(</span> |
| <span class="source-line-no">331</span><span id="line-331"> correctAssignments, regionPlansForMisplacedRegions);</span> |
| <span class="source-line-no">332</span><span id="line-332"> }</span> |
| <span class="source-line-no">333</span><span id="line-333"></span> |
| <span class="source-line-no">334</span><span id="line-334"> @Override</span> |
| <span class="source-line-no">335</span><span id="line-335"> public void initialize() throws IOException {</span> |
| <span class="source-line-no">336</span><span id="line-336"> if (rsGroupInfoManager == null) {</span> |
| <span class="source-line-no">337</span><span id="line-337"> rsGroupInfoManager = masterServices.getRSGroupInfoManager();</span> |
| <span class="source-line-no">338</span><span id="line-338"> if (rsGroupInfoManager == null) {</span> |
| <span class="source-line-no">339</span><span id="line-339"> String msg = "RSGroupInfoManager hasn't been initialized";</span> |
| <span class="source-line-no">340</span><span id="line-340"> LOG.error(msg);</span> |
| <span class="source-line-no">341</span><span id="line-341"> throw new HBaseIOException(msg);</span> |
| <span class="source-line-no">342</span><span id="line-342"> }</span> |
| <span class="source-line-no">343</span><span id="line-343"> rsGroupInfoManager.start();</span> |
| <span class="source-line-no">344</span><span id="line-344"> }</span> |
| <span class="source-line-no">345</span><span id="line-345"></span> |
| <span class="source-line-no">346</span><span id="line-346"> // Create the balancer</span> |
| <span class="source-line-no">347</span><span id="line-347"> Configuration conf = masterServices.getConfiguration();</span> |
| <span class="source-line-no">348</span><span id="line-348"> Class<? extends LoadBalancer> balancerClass;</span> |
| <span class="source-line-no">349</span><span id="line-349"> @SuppressWarnings("deprecation")</span> |
| <span class="source-line-no">350</span><span id="line-350"> String balancerClassName = conf.get(HBASE_RSGROUP_LOADBALANCER_CLASS);</span> |
| <span class="source-line-no">351</span><span id="line-351"> if (balancerClassName == null) {</span> |
| <span class="source-line-no">352</span><span id="line-352"> balancerClass = conf.getClass(HConstants.HBASE_MASTER_LOADBALANCER_CLASS,</span> |
| <span class="source-line-no">353</span><span id="line-353"> LoadBalancerFactory.getDefaultLoadBalancerClass(), LoadBalancer.class);</span> |
| <span class="source-line-no">354</span><span id="line-354"> } else {</span> |
| <span class="source-line-no">355</span><span id="line-355"> try {</span> |
| <span class="source-line-no">356</span><span id="line-356"> balancerClass = Class.forName(balancerClassName).asSubclass(LoadBalancer.class);</span> |
| <span class="source-line-no">357</span><span id="line-357"> } catch (ClassNotFoundException e) {</span> |
| <span class="source-line-no">358</span><span id="line-358"> throw new IOException(e);</span> |
| <span class="source-line-no">359</span><span id="line-359"> }</span> |
| <span class="source-line-no">360</span><span id="line-360"> }</span> |
| <span class="source-line-no">361</span><span id="line-361"> this.provider = new MasterClusterInfoProvider(masterServices);</span> |
| <span class="source-line-no">362</span><span id="line-362"> // avoid infinite nesting</span> |
| <span class="source-line-no">363</span><span id="line-363"> if (getClass().isAssignableFrom(balancerClass)) {</span> |
| <span class="source-line-no">364</span><span id="line-364"> balancerClass = LoadBalancerFactory.getDefaultLoadBalancerClass();</span> |
| <span class="source-line-no">365</span><span id="line-365"> }</span> |
| <span class="source-line-no">366</span><span id="line-366"> internalBalancer = ReflectionUtils.newInstance(balancerClass);</span> |
| <span class="source-line-no">367</span><span id="line-367"> internalBalancer.setClusterInfoProvider(provider);</span> |
| <span class="source-line-no">368</span><span id="line-368"> // special handling for favor node balancers</span> |
| <span class="source-line-no">369</span><span id="line-369"> if (internalBalancer instanceof FavoredNodesPromoter) {</span> |
| <span class="source-line-no">370</span><span id="line-370"> favoredNodesManager = new FavoredNodesManager(provider);</span> |
| <span class="source-line-no">371</span><span id="line-371"> ((FavoredNodesPromoter) internalBalancer).setFavoredNodesManager(favoredNodesManager);</span> |
| <span class="source-line-no">372</span><span id="line-372"> }</span> |
| <span class="source-line-no">373</span><span id="line-373"> internalBalancer.initialize();</span> |
| <span class="source-line-no">374</span><span id="line-374"> // init fallback groups</span> |
| <span class="source-line-no">375</span><span id="line-375"> this.fallbackEnabled = conf.getBoolean(FALLBACK_GROUP_ENABLE_KEY, false);</span> |
| <span class="source-line-no">376</span><span id="line-376"> }</span> |
| <span class="source-line-no">377</span><span id="line-377"></span> |
| <span class="source-line-no">378</span><span id="line-378"> public boolean isOnline() {</span> |
| <span class="source-line-no">379</span><span id="line-379"> if (this.rsGroupInfoManager == null) {</span> |
| <span class="source-line-no">380</span><span id="line-380"> return false;</span> |
| <span class="source-line-no">381</span><span id="line-381"> }</span> |
| <span class="source-line-no">382</span><span id="line-382"></span> |
| <span class="source-line-no">383</span><span id="line-383"> return this.rsGroupInfoManager.isOnline();</span> |
| <span class="source-line-no">384</span><span id="line-384"> }</span> |
| <span class="source-line-no">385</span><span id="line-385"></span> |
| <span class="source-line-no">386</span><span id="line-386"> public boolean isFallbackEnabled() {</span> |
| <span class="source-line-no">387</span><span id="line-387"> return fallbackEnabled;</span> |
| <span class="source-line-no">388</span><span id="line-388"> }</span> |
| <span class="source-line-no">389</span><span id="line-389"></span> |
| <span class="source-line-no">390</span><span id="line-390"> @Override</span> |
| <span class="source-line-no">391</span><span id="line-391"> public void regionOnline(RegionInfo regionInfo, ServerName sn) {</span> |
| <span class="source-line-no">392</span><span id="line-392"> }</span> |
| <span class="source-line-no">393</span><span id="line-393"></span> |
| <span class="source-line-no">394</span><span id="line-394"> @Override</span> |
| <span class="source-line-no">395</span><span id="line-395"> public void regionOffline(RegionInfo regionInfo) {</span> |
| <span class="source-line-no">396</span><span id="line-396"> }</span> |
| <span class="source-line-no">397</span><span id="line-397"></span> |
| <span class="source-line-no">398</span><span id="line-398"> @Override</span> |
| <span class="source-line-no">399</span><span id="line-399"> public synchronized void onConfigurationChange(Configuration conf) {</span> |
| <span class="source-line-no">400</span><span id="line-400"> boolean newFallbackEnabled = conf.getBoolean(FALLBACK_GROUP_ENABLE_KEY, false);</span> |
| <span class="source-line-no">401</span><span id="line-401"> if (fallbackEnabled != newFallbackEnabled) {</span> |
| <span class="source-line-no">402</span><span id="line-402"> LOG.info("Changing the value of {} from {} to {}", FALLBACK_GROUP_ENABLE_KEY, fallbackEnabled,</span> |
| <span class="source-line-no">403</span><span id="line-403"> newFallbackEnabled);</span> |
| <span class="source-line-no">404</span><span id="line-404"> fallbackEnabled = newFallbackEnabled;</span> |
| <span class="source-line-no">405</span><span id="line-405"> }</span> |
| <span class="source-line-no">406</span><span id="line-406"> provider.onConfigurationChange(conf);</span> |
| <span class="source-line-no">407</span><span id="line-407"> internalBalancer.onConfigurationChange(conf);</span> |
| <span class="source-line-no">408</span><span id="line-408"> }</span> |
| <span class="source-line-no">409</span><span id="line-409"></span> |
| <span class="source-line-no">410</span><span id="line-410"> @Override</span> |
| <span class="source-line-no">411</span><span id="line-411"> public void stop(String why) {</span> |
| <span class="source-line-no">412</span><span id="line-412"> internalBalancer.stop(why);</span> |
| <span class="source-line-no">413</span><span id="line-413"> }</span> |
| <span class="source-line-no">414</span><span id="line-414"></span> |
| <span class="source-line-no">415</span><span id="line-415"> @Override</span> |
| <span class="source-line-no">416</span><span id="line-416"> public boolean isStopped() {</span> |
| <span class="source-line-no">417</span><span id="line-417"> return internalBalancer.isStopped();</span> |
| <span class="source-line-no">418</span><span id="line-418"> }</span> |
| <span class="source-line-no">419</span><span id="line-419"></span> |
| <span class="source-line-no">420</span><span id="line-420"> public LoadBalancer getInternalBalancer() {</span> |
| <span class="source-line-no">421</span><span id="line-421"> return internalBalancer;</span> |
| <span class="source-line-no">422</span><span id="line-422"> }</span> |
| <span class="source-line-no">423</span><span id="line-423"></span> |
| <span class="source-line-no">424</span><span id="line-424"> public FavoredNodesManager getFavoredNodesManager() {</span> |
| <span class="source-line-no">425</span><span id="line-425"> return favoredNodesManager;</span> |
| <span class="source-line-no">426</span><span id="line-426"> }</span> |
| <span class="source-line-no">427</span><span id="line-427"></span> |
| <span class="source-line-no">428</span><span id="line-428"> @Override</span> |
| <span class="source-line-no">429</span><span id="line-429"> public synchronized void postMasterStartupInitialize() {</span> |
| <span class="source-line-no">430</span><span id="line-430"> this.internalBalancer.postMasterStartupInitialize();</span> |
| <span class="source-line-no">431</span><span id="line-431"> }</span> |
| <span class="source-line-no">432</span><span id="line-432"></span> |
| <span class="source-line-no">433</span><span id="line-433"> public void updateBalancerStatus(boolean status) {</span> |
| <span class="source-line-no">434</span><span id="line-434"> internalBalancer.updateBalancerStatus(status);</span> |
| <span class="source-line-no">435</span><span id="line-435"> }</span> |
| <span class="source-line-no">436</span><span id="line-436"></span> |
| <span class="source-line-no">437</span><span id="line-437"> private List<ServerName> getFallBackCandidates(List<ServerName> servers) {</span> |
| <span class="source-line-no">438</span><span id="line-438"> List<ServerName> serverNames = null;</span> |
| <span class="source-line-no">439</span><span id="line-439"> try {</span> |
| <span class="source-line-no">440</span><span id="line-440"> RSGroupInfo info = rsGroupInfoManager.getRSGroup(RSGroupInfo.DEFAULT_GROUP);</span> |
| <span class="source-line-no">441</span><span id="line-441"> serverNames = filterOfflineServers(info, servers);</span> |
| <span class="source-line-no">442</span><span id="line-442"> } catch (IOException e) {</span> |
| <span class="source-line-no">443</span><span id="line-443"> LOG.error("Failed to get default rsgroup info to fallback", e);</span> |
| <span class="source-line-no">444</span><span id="line-444"> }</span> |
| <span class="source-line-no">445</span><span id="line-445"> return serverNames == null || serverNames.isEmpty() ? servers : serverNames;</span> |
| <span class="source-line-no">446</span><span id="line-446"> }</span> |
| <span class="source-line-no">447</span><span id="line-447"></span> |
| <span class="source-line-no">448</span><span id="line-448"> @Override</span> |
| <span class="source-line-no">449</span><span id="line-449"> public void setClusterInfoProvider(ClusterInfoProvider provider) {</span> |
| <span class="source-line-no">450</span><span id="line-450"> throw new UnsupportedOperationException("Just call set master service instead");</span> |
| <span class="source-line-no">451</span><span id="line-451"> }</span> |
| <span class="source-line-no">452</span><span id="line-452">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
