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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 java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.ArrayList;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.HashMap;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.List;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.Map;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.ClusterMetrics;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.RegionMetrics;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.ScheduledChore;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.ServerMetrics;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.ServerName;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.Stoppable;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.client.PerClientRandomNonceGenerator;</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.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.slf4j.Logger;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">039</span><span id="line-39"></span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hbase.thirdparty.org.apache.commons.collections4.MapUtils;</span> |
| <span class="source-line-no">041</span><span id="line-41"></span> |
| <span class="source-line-no">042</span><span id="line-42">/**</span> |
| <span class="source-line-no">043</span><span id="line-43"> * This chore, every time it runs, will try to recover regions with high store ref count by</span> |
| <span class="source-line-no">044</span><span id="line-44"> * reopening them</span> |
| <span class="source-line-no">045</span><span id="line-45"> */</span> |
| <span class="source-line-no">046</span><span id="line-46">@InterfaceAudience.Private</span> |
| <span class="source-line-no">047</span><span id="line-47">public class RegionsRecoveryChore extends ScheduledChore {</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 Logger LOG = LoggerFactory.getLogger(RegionsRecoveryChore.class);</span> |
| <span class="source-line-no">050</span><span id="line-50"></span> |
| <span class="source-line-no">051</span><span id="line-51"> private static final String REGIONS_RECOVERY_CHORE_NAME = "RegionsRecoveryChore";</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53"> private static final String ERROR_REOPEN_REIONS_MSG =</span> |
| <span class="source-line-no">054</span><span id="line-54"> "Error reopening regions with high storeRefCount. ";</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> private final HMaster hMaster;</span> |
| <span class="source-line-no">057</span><span id="line-57"> private final int storeFileRefCountThreshold;</span> |
| <span class="source-line-no">058</span><span id="line-58"></span> |
| <span class="source-line-no">059</span><span id="line-59"> private static final PerClientRandomNonceGenerator NONCE_GENERATOR =</span> |
| <span class="source-line-no">060</span><span id="line-60"> PerClientRandomNonceGenerator.get();</span> |
| <span class="source-line-no">061</span><span id="line-61"></span> |
| <span class="source-line-no">062</span><span id="line-62"> /**</span> |
| <span class="source-line-no">063</span><span id="line-63"> * Construct RegionsRecoveryChore with provided params</span> |
| <span class="source-line-no">064</span><span id="line-64"> * @param stopper When {@link Stoppable#isStopped()} is true, this chore will cancel and</span> |
| <span class="source-line-no">065</span><span id="line-65"> * cleanup</span> |
| <span class="source-line-no">066</span><span id="line-66"> * @param configuration The configuration params to be used</span> |
| <span class="source-line-no">067</span><span id="line-67"> * @param hMaster HMaster instance to initiate RegionTableRegions</span> |
| <span class="source-line-no">068</span><span id="line-68"> */</span> |
| <span class="source-line-no">069</span><span id="line-69"> RegionsRecoveryChore(final Stoppable stopper, final Configuration configuration,</span> |
| <span class="source-line-no">070</span><span id="line-70"> final HMaster hMaster) {</span> |
| <span class="source-line-no">071</span><span id="line-71"> super(REGIONS_RECOVERY_CHORE_NAME, stopper, configuration</span> |
| <span class="source-line-no">072</span><span id="line-72"> .getInt(HConstants.REGIONS_RECOVERY_INTERVAL, HConstants.DEFAULT_REGIONS_RECOVERY_INTERVAL));</span> |
| <span class="source-line-no">073</span><span id="line-73"> this.hMaster = hMaster;</span> |
| <span class="source-line-no">074</span><span id="line-74"> this.storeFileRefCountThreshold = configuration.getInt(</span> |
| <span class="source-line-no">075</span><span id="line-75"> HConstants.STORE_FILE_REF_COUNT_THRESHOLD, HConstants.DEFAULT_STORE_FILE_REF_COUNT_THRESHOLD);</span> |
| <span class="source-line-no">076</span><span id="line-76"></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"> @Override</span> |
| <span class="source-line-no">080</span><span id="line-80"> protected void chore() {</span> |
| <span class="source-line-no">081</span><span id="line-81"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">082</span><span id="line-82"> LOG.trace(</span> |
| <span class="source-line-no">083</span><span id="line-83"> "Starting up Regions Recovery chore for reopening regions based on storeFileRefCount...");</span> |
| <span class="source-line-no">084</span><span id="line-84"> }</span> |
| <span class="source-line-no">085</span><span id="line-85"> try {</span> |
| <span class="source-line-no">086</span><span id="line-86"> // only if storeFileRefCountThreshold > 0, consider the feature turned on</span> |
| <span class="source-line-no">087</span><span id="line-87"> if (storeFileRefCountThreshold > 0) {</span> |
| <span class="source-line-no">088</span><span id="line-88"> final ClusterMetrics clusterMetrics = hMaster.getClusterMetrics();</span> |
| <span class="source-line-no">089</span><span id="line-89"> final Map<ServerName, ServerMetrics> serverMetricsMap =</span> |
| <span class="source-line-no">090</span><span id="line-90"> clusterMetrics.getLiveServerMetrics();</span> |
| <span class="source-line-no">091</span><span id="line-91"> final Map<TableName, List<byte[]>> tableToReopenRegionsMap =</span> |
| <span class="source-line-no">092</span><span id="line-92"> getTableToRegionsByRefCount(serverMetricsMap);</span> |
| <span class="source-line-no">093</span><span id="line-93"> if (MapUtils.isNotEmpty(tableToReopenRegionsMap)) {</span> |
| <span class="source-line-no">094</span><span id="line-94"> tableToReopenRegionsMap.forEach((tableName, regionNames) -> {</span> |
| <span class="source-line-no">095</span><span id="line-95"> try {</span> |
| <span class="source-line-no">096</span><span id="line-96"> LOG.warn("Reopening regions due to high storeFileRefCount. "</span> |
| <span class="source-line-no">097</span><span id="line-97"> + "TableName: {} , noOfRegions: {}", tableName, regionNames.size());</span> |
| <span class="source-line-no">098</span><span id="line-98"> hMaster.reopenRegions(tableName, regionNames, NONCE_GENERATOR.getNonceGroup(),</span> |
| <span class="source-line-no">099</span><span id="line-99"> NONCE_GENERATOR.newNonce());</span> |
| <span class="source-line-no">100</span><span id="line-100"> } catch (IOException e) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> LOG.error("{} tableName: {}, regionNames: {}", ERROR_REOPEN_REIONS_MSG, tableName,</span> |
| <span class="source-line-no">102</span><span id="line-102"> regionNames, e);</span> |
| <span class="source-line-no">103</span><span id="line-103"> }</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"> } else {</span> |
| <span class="source-line-no">107</span><span id="line-107"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">108</span><span id="line-108"> LOG.debug(</span> |
| <span class="source-line-no">109</span><span id="line-109"> "Reopening regions with very high storeFileRefCount is disabled. "</span> |
| <span class="source-line-no">110</span><span id="line-110"> + "Provide threshold value > 0 for {} to enable it.",</span> |
| <span class="source-line-no">111</span><span id="line-111"> HConstants.STORE_FILE_REF_COUNT_THRESHOLD);</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"> } catch (Exception e) {</span> |
| <span class="source-line-no">115</span><span id="line-115"> LOG.error("Error while reopening regions based on storeRefCount threshold", e);</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">118</span><span id="line-118"> LOG.trace(</span> |
| <span class="source-line-no">119</span><span id="line-119"> "Exiting Regions Recovery chore for reopening regions based on storeFileRefCount...");</span> |
| <span class="source-line-no">120</span><span id="line-120"> }</span> |
| <span class="source-line-no">121</span><span id="line-121"> }</span> |
| <span class="source-line-no">122</span><span id="line-122"></span> |
| <span class="source-line-no">123</span><span id="line-123"> private Map<TableName, List<byte[]>></span> |
| <span class="source-line-no">124</span><span id="line-124"> getTableToRegionsByRefCount(final Map<ServerName, ServerMetrics> serverMetricsMap) {</span> |
| <span class="source-line-no">125</span><span id="line-125"> final Map<TableName, List<byte[]>> tableToReopenRegionsMap = new HashMap<>();</span> |
| <span class="source-line-no">126</span><span id="line-126"> for (ServerMetrics serverMetrics : serverMetricsMap.values()) {</span> |
| <span class="source-line-no">127</span><span id="line-127"> Map<byte[], RegionMetrics> regionMetricsMap = serverMetrics.getRegionMetrics();</span> |
| <span class="source-line-no">128</span><span id="line-128"> for (RegionMetrics regionMetrics : regionMetricsMap.values()) {</span> |
| <span class="source-line-no">129</span><span id="line-129"> // For each region, each compacted store file can have different ref counts</span> |
| <span class="source-line-no">130</span><span id="line-130"> // We need to find maximum of all such ref counts and if that max count of compacted</span> |
| <span class="source-line-no">131</span><span id="line-131"> // store files is beyond a threshold value, we should reopen the region.</span> |
| <span class="source-line-no">132</span><span id="line-132"> // Here, we take max ref count of all compacted store files and not the cumulative</span> |
| <span class="source-line-no">133</span><span id="line-133"> // count of all compacted store files</span> |
| <span class="source-line-no">134</span><span id="line-134"> final int maxCompactedStoreFileRefCount = regionMetrics.getMaxCompactedStoreFileRefCount();</span> |
| <span class="source-line-no">135</span><span id="line-135"></span> |
| <span class="source-line-no">136</span><span id="line-136"> if (maxCompactedStoreFileRefCount > storeFileRefCountThreshold) {</span> |
| <span class="source-line-no">137</span><span id="line-137"> final byte[] regionName = regionMetrics.getRegionName();</span> |
| <span class="source-line-no">138</span><span id="line-138"> prepareTableToReopenRegionsMap(tableToReopenRegionsMap, regionName,</span> |
| <span class="source-line-no">139</span><span id="line-139"> maxCompactedStoreFileRefCount);</span> |
| <span class="source-line-no">140</span><span id="line-140"> }</span> |
| <span class="source-line-no">141</span><span id="line-141"> }</span> |
| <span class="source-line-no">142</span><span id="line-142"> }</span> |
| <span class="source-line-no">143</span><span id="line-143"> return tableToReopenRegionsMap;</span> |
| <span class="source-line-no">144</span><span id="line-144"> }</span> |
| <span class="source-line-no">145</span><span id="line-145"></span> |
| <span class="source-line-no">146</span><span id="line-146"> private void prepareTableToReopenRegionsMap(</span> |
| <span class="source-line-no">147</span><span id="line-147"> final Map<TableName, List<byte[]>> tableToReopenRegionsMap, final byte[] regionName,</span> |
| <span class="source-line-no">148</span><span id="line-148"> final int regionStoreRefCount) {</span> |
| <span class="source-line-no">149</span><span id="line-149"> final RegionInfo regionInfo = hMaster.getAssignmentManager().getRegionInfo(regionName);</span> |
| <span class="source-line-no">150</span><span id="line-150"> final TableName tableName = regionInfo.getTable();</span> |
| <span class="source-line-no">151</span><span id="line-151"> if (TableName.isMetaTableName(tableName)) {</span> |
| <span class="source-line-no">152</span><span id="line-152"> // Do not reopen regions of meta table even if it has</span> |
| <span class="source-line-no">153</span><span id="line-153"> // high store file reference count</span> |
| <span class="source-line-no">154</span><span id="line-154"> return;</span> |
| <span class="source-line-no">155</span><span id="line-155"> }</span> |
| <span class="source-line-no">156</span><span id="line-156"> LOG.warn("Region {} for Table {} has high storeFileRefCount {}, considering it for reopen..",</span> |
| <span class="source-line-no">157</span><span id="line-157"> regionInfo.getRegionNameAsString(), tableName, regionStoreRefCount);</span> |
| <span class="source-line-no">158</span><span id="line-158"> tableToReopenRegionsMap.computeIfAbsent(tableName, (key) -> new ArrayList<>()).add(regionName);</span> |
| <span class="source-line-no">159</span><span id="line-159"> }</span> |
| <span class="source-line-no">160</span><span id="line-160">}</span> |
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| </div> |
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