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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.master;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.HashMap;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.Map;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configuration;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.ClusterMetrics;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HConstants;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.RegionMetrics;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.ScheduledChore;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.ServerMetrics;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.ServerName;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.Stoppable;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.TableName;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.PerClientRandomNonceGenerator;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.slf4j.Logger;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.slf4j.LoggerFactory;<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.hbase.thirdparty.org.apache.commons.collections4.MapUtils;<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>/**<a name="line.44"></a>
<span class="sourceLineNo">045</span> * This chore, every time it runs, will try to recover regions with high store ref count<a name="line.45"></a>
<span class="sourceLineNo">046</span> * by reopening them<a name="line.46"></a>
<span class="sourceLineNo">047</span> */<a name="line.47"></a>
<span class="sourceLineNo">048</span>@InterfaceAudience.Private<a name="line.48"></a>
<span class="sourceLineNo">049</span>public class RegionsRecoveryChore extends ScheduledChore {<a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
<span class="sourceLineNo">051</span> private static final Logger LOG = LoggerFactory.getLogger(RegionsRecoveryChore.class);<a name="line.51"></a>
<span class="sourceLineNo">052</span><a name="line.52"></a>
<span class="sourceLineNo">053</span> private static final String REGIONS_RECOVERY_CHORE_NAME = "RegionsRecoveryChore";<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span> private static final String ERROR_REOPEN_REIONS_MSG =<a name="line.55"></a>
<span class="sourceLineNo">056</span> "Error reopening regions with high storeRefCount. ";<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span> private final HMaster hMaster;<a name="line.58"></a>
<span class="sourceLineNo">059</span> private final int storeFileRefCountThreshold;<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span> private static final PerClientRandomNonceGenerator NONCE_GENERATOR =<a name="line.61"></a>
<span class="sourceLineNo">062</span> PerClientRandomNonceGenerator.get();<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span> /**<a name="line.64"></a>
<span class="sourceLineNo">065</span> * Construct RegionsRecoveryChore with provided params<a name="line.65"></a>
<span class="sourceLineNo">066</span> *<a name="line.66"></a>
<span class="sourceLineNo">067</span> * @param stopper When {@link Stoppable#isStopped()} is true, this chore will cancel and cleanup<a name="line.67"></a>
<span class="sourceLineNo">068</span> * @param configuration The configuration params to be used<a name="line.68"></a>
<span class="sourceLineNo">069</span> * @param hMaster HMaster instance to initiate RegionTableRegions<a name="line.69"></a>
<span class="sourceLineNo">070</span> */<a name="line.70"></a>
<span class="sourceLineNo">071</span> RegionsRecoveryChore(final Stoppable stopper, final Configuration configuration,<a name="line.71"></a>
<span class="sourceLineNo">072</span> final HMaster hMaster) {<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span> super(REGIONS_RECOVERY_CHORE_NAME, stopper, configuration.getInt(<a name="line.74"></a>
<span class="sourceLineNo">075</span> HConstants.REGIONS_RECOVERY_INTERVAL, HConstants.DEFAULT_REGIONS_RECOVERY_INTERVAL));<a name="line.75"></a>
<span class="sourceLineNo">076</span> this.hMaster = hMaster;<a name="line.76"></a>
<span class="sourceLineNo">077</span> this.storeFileRefCountThreshold = configuration.getInt(<a name="line.77"></a>
<span class="sourceLineNo">078</span> HConstants.STORE_FILE_REF_COUNT_THRESHOLD,<a name="line.78"></a>
<span class="sourceLineNo">079</span> HConstants.DEFAULT_STORE_FILE_REF_COUNT_THRESHOLD);<a name="line.79"></a>
<span class="sourceLineNo">080</span><a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> @Override<a name="line.83"></a>
<span class="sourceLineNo">084</span> protected void chore() {<a name="line.84"></a>
<span class="sourceLineNo">085</span> if (LOG.isTraceEnabled()) {<a name="line.85"></a>
<span class="sourceLineNo">086</span> LOG.trace(<a name="line.86"></a>
<span class="sourceLineNo">087</span> "Starting up Regions Recovery chore for reopening regions based on storeFileRefCount...");<a name="line.87"></a>
<span class="sourceLineNo">088</span> }<a name="line.88"></a>
<span class="sourceLineNo">089</span> try {<a name="line.89"></a>
<span class="sourceLineNo">090</span> // only if storeFileRefCountThreshold &gt; 0, consider the feature turned on<a name="line.90"></a>
<span class="sourceLineNo">091</span> if (storeFileRefCountThreshold &gt; 0) {<a name="line.91"></a>
<span class="sourceLineNo">092</span> final ClusterMetrics clusterMetrics = hMaster.getClusterMetrics();<a name="line.92"></a>
<span class="sourceLineNo">093</span> final Map&lt;ServerName, ServerMetrics&gt; serverMetricsMap =<a name="line.93"></a>
<span class="sourceLineNo">094</span> clusterMetrics.getLiveServerMetrics();<a name="line.94"></a>
<span class="sourceLineNo">095</span> final Map&lt;TableName, List&lt;byte[]&gt;&gt; tableToReopenRegionsMap =<a name="line.95"></a>
<span class="sourceLineNo">096</span> getTableToRegionsByRefCount(serverMetricsMap);<a name="line.96"></a>
<span class="sourceLineNo">097</span> if (MapUtils.isNotEmpty(tableToReopenRegionsMap)) {<a name="line.97"></a>
<span class="sourceLineNo">098</span> tableToReopenRegionsMap.forEach((tableName, regionNames) -&gt; {<a name="line.98"></a>
<span class="sourceLineNo">099</span> try {<a name="line.99"></a>
<span class="sourceLineNo">100</span> LOG.warn("Reopening regions due to high storeFileRefCount. " +<a name="line.100"></a>
<span class="sourceLineNo">101</span> "TableName: {} , noOfRegions: {}", tableName, regionNames.size());<a name="line.101"></a>
<span class="sourceLineNo">102</span> hMaster.reopenRegions(tableName, regionNames, NONCE_GENERATOR.getNonceGroup(),<a name="line.102"></a>
<span class="sourceLineNo">103</span> NONCE_GENERATOR.newNonce());<a name="line.103"></a>
<span class="sourceLineNo">104</span> } catch (IOException e) {<a name="line.104"></a>
<span class="sourceLineNo">105</span> LOG.error("{} tableName: {}, regionNames: {}", ERROR_REOPEN_REIONS_MSG,<a name="line.105"></a>
<span class="sourceLineNo">106</span> tableName, regionNames, e);<a name="line.106"></a>
<span class="sourceLineNo">107</span> }<a name="line.107"></a>
<span class="sourceLineNo">108</span> });<a name="line.108"></a>
<span class="sourceLineNo">109</span> }<a name="line.109"></a>
<span class="sourceLineNo">110</span> } else {<a name="line.110"></a>
<span class="sourceLineNo">111</span> if (LOG.isDebugEnabled()) {<a name="line.111"></a>
<span class="sourceLineNo">112</span> LOG.debug("Reopening regions with very high storeFileRefCount is disabled. " +<a name="line.112"></a>
<span class="sourceLineNo">113</span> "Provide threshold value &gt; 0 for {} to enable it.",<a name="line.113"></a>
<span class="sourceLineNo">114</span> HConstants.STORE_FILE_REF_COUNT_THRESHOLD);<a name="line.114"></a>
<span class="sourceLineNo">115</span> }<a name="line.115"></a>
<span class="sourceLineNo">116</span> }<a name="line.116"></a>
<span class="sourceLineNo">117</span> } catch (Exception e) {<a name="line.117"></a>
<span class="sourceLineNo">118</span> LOG.error("Error while reopening regions based on storeRefCount threshold", e);<a name="line.118"></a>
<span class="sourceLineNo">119</span> }<a name="line.119"></a>
<span class="sourceLineNo">120</span> if (LOG.isTraceEnabled()) {<a name="line.120"></a>
<span class="sourceLineNo">121</span> LOG.trace(<a name="line.121"></a>
<span class="sourceLineNo">122</span> "Exiting Regions Recovery chore for reopening regions based on storeFileRefCount...");<a name="line.122"></a>
<span class="sourceLineNo">123</span> }<a name="line.123"></a>
<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span> private Map&lt;TableName, List&lt;byte[]&gt;&gt; getTableToRegionsByRefCount(<a name="line.126"></a>
<span class="sourceLineNo">127</span> final Map&lt;ServerName, ServerMetrics&gt; serverMetricsMap) {<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span> final Map&lt;TableName, List&lt;byte[]&gt;&gt; tableToReopenRegionsMap = new HashMap&lt;&gt;();<a name="line.129"></a>
<span class="sourceLineNo">130</span> for (ServerMetrics serverMetrics : serverMetricsMap.values()) {<a name="line.130"></a>
<span class="sourceLineNo">131</span> Map&lt;byte[], RegionMetrics&gt; regionMetricsMap = serverMetrics.getRegionMetrics();<a name="line.131"></a>
<span class="sourceLineNo">132</span> for (RegionMetrics regionMetrics : regionMetricsMap.values()) {<a name="line.132"></a>
<span class="sourceLineNo">133</span> // For each region, each compacted store file can have different ref counts<a name="line.133"></a>
<span class="sourceLineNo">134</span> // We need to find maximum of all such ref counts and if that max count of compacted<a name="line.134"></a>
<span class="sourceLineNo">135</span> // store files is beyond a threshold value, we should reopen the region.<a name="line.135"></a>
<span class="sourceLineNo">136</span> // Here, we take max ref count of all compacted store files and not the cumulative<a name="line.136"></a>
<span class="sourceLineNo">137</span> // count of all compacted store files<a name="line.137"></a>
<span class="sourceLineNo">138</span> final int maxCompactedStoreFileRefCount = regionMetrics<a name="line.138"></a>
<span class="sourceLineNo">139</span> .getMaxCompactedStoreFileRefCount();<a name="line.139"></a>
<span class="sourceLineNo">140</span><a name="line.140"></a>
<span class="sourceLineNo">141</span> if (maxCompactedStoreFileRefCount &gt; storeFileRefCountThreshold) {<a name="line.141"></a>
<span class="sourceLineNo">142</span> final byte[] regionName = regionMetrics.getRegionName();<a name="line.142"></a>
<span class="sourceLineNo">143</span> prepareTableToReopenRegionsMap(tableToReopenRegionsMap, regionName,<a name="line.143"></a>
<span class="sourceLineNo">144</span> maxCompactedStoreFileRefCount);<a name="line.144"></a>
<span class="sourceLineNo">145</span> }<a name="line.145"></a>
<span class="sourceLineNo">146</span> }<a name="line.146"></a>
<span class="sourceLineNo">147</span> }<a name="line.147"></a>
<span class="sourceLineNo">148</span> return tableToReopenRegionsMap;<a name="line.148"></a>
<span class="sourceLineNo">149</span><a name="line.149"></a>
<span class="sourceLineNo">150</span> }<a name="line.150"></a>
<span class="sourceLineNo">151</span><a name="line.151"></a>
<span class="sourceLineNo">152</span> private void prepareTableToReopenRegionsMap(<a name="line.152"></a>
<span class="sourceLineNo">153</span> final Map&lt;TableName, List&lt;byte[]&gt;&gt; tableToReopenRegionsMap,<a name="line.153"></a>
<span class="sourceLineNo">154</span> final byte[] regionName, final int regionStoreRefCount) {<a name="line.154"></a>
<span class="sourceLineNo">155</span><a name="line.155"></a>
<span class="sourceLineNo">156</span> final RegionInfo regionInfo = hMaster.getAssignmentManager().getRegionInfo(regionName);<a name="line.156"></a>
<span class="sourceLineNo">157</span> final TableName tableName = regionInfo.getTable();<a name="line.157"></a>
<span class="sourceLineNo">158</span> if (TableName.isMetaTableName(tableName)) {<a name="line.158"></a>
<span class="sourceLineNo">159</span> // Do not reopen regions of meta table even if it has<a name="line.159"></a>
<span class="sourceLineNo">160</span> // high store file reference count<a name="line.160"></a>
<span class="sourceLineNo">161</span> return;<a name="line.161"></a>
<span class="sourceLineNo">162</span> }<a name="line.162"></a>
<span class="sourceLineNo">163</span> LOG.warn("Region {} for Table {} has high storeFileRefCount {}, considering it for reopen..",<a name="line.163"></a>
<span class="sourceLineNo">164</span> regionInfo.getRegionNameAsString(), tableName, regionStoreRefCount);<a name="line.164"></a>
<span class="sourceLineNo">165</span> tableToReopenRegionsMap<a name="line.165"></a>
<span class="sourceLineNo">166</span> .computeIfAbsent(tableName, (key) -&gt; new ArrayList&lt;&gt;()).add(regionName);<a name="line.166"></a>
<span class="sourceLineNo">167</span> }<a name="line.167"></a>
<span class="sourceLineNo">168</span><a name="line.168"></a>
<span class="sourceLineNo">169</span> // hashcode/equals implementation to ensure at-most one object of RegionsRecoveryChore<a name="line.169"></a>
<span class="sourceLineNo">170</span> // is scheduled at a time - RegionsRecoveryConfigManager<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span> @Override<a name="line.172"></a>
<span class="sourceLineNo">173</span> public boolean equals(Object o) {<a name="line.173"></a>
<span class="sourceLineNo">174</span> if (this == o) {<a name="line.174"></a>
<span class="sourceLineNo">175</span> return true;<a name="line.175"></a>
<span class="sourceLineNo">176</span> }<a name="line.176"></a>
<span class="sourceLineNo">177</span> return o != null &amp;&amp; getClass() == o.getClass();<a name="line.177"></a>
<span class="sourceLineNo">178</span> }<a name="line.178"></a>
<span class="sourceLineNo">179</span><a name="line.179"></a>
<span class="sourceLineNo">180</span> @Override<a name="line.180"></a>
<span class="sourceLineNo">181</span> public int hashCode() {<a name="line.181"></a>
<span class="sourceLineNo">182</span> return 31;<a name="line.182"></a>
<span class="sourceLineNo">183</span> }<a name="line.183"></a>
<span class="sourceLineNo">184</span><a name="line.184"></a>
<span class="sourceLineNo">185</span>}<a name="line.185"></a>
</pre>
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