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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>package org.apache.hadoop.hbase.regionserver.handler;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import edu.umd.cs.findbugs.annotations.Nullable;<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.concurrent.TimeUnit;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.HConstants;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.client.TableDescriptor;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.executor.EventHandler;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.executor.EventType;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.regionserver.HRegionServer;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.regionserver.Region;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.regionserver.RegionServerServices.PostOpenDeployContext;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.regionserver.RegionServerServices.RegionStateTransitionContext;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.util.RetryCounter;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.slf4j.Logger;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.slf4j.LoggerFactory;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span>/**<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * Handles opening of a region on a region server.<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * <p/><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * Just done the same thing with the old {@link OpenRegionHandler}, with some modifications on<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * fencing and retrying. But we need to keep the {@link OpenRegionHandler} as is to keep compatible<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * with the zk less assignment for 1.x, otherwise it is not possible to do rolling upgrade.<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> */<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>@InterfaceAudience.Private<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>public class AssignRegionHandler extends EventHandler {<a name="line.47"></a> |
| <span class="sourceLineNo">048</span><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> private static final Logger LOG = LoggerFactory.getLogger(AssignRegionHandler.class);<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> private final RegionInfo regionInfo;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> private final long openProcId;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private final TableDescriptor tableDesc;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> private final long masterSystemTime;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> private final RetryCounter retryCounter;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> public AssignRegionHandler(HRegionServer server, RegionInfo regionInfo, long openProcId,<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> @Nullable TableDescriptor tableDesc, long masterSystemTime, EventType eventType) {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> super(server, eventType);<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> this.regionInfo = regionInfo;<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> this.openProcId = openProcId;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> this.tableDesc = tableDesc;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> this.masterSystemTime = masterSystemTime;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> this.retryCounter = HandlerUtil.getRetryCounter();<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> }<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> private HRegionServer getServer() {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> return (HRegionServer) server;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> }<a name="line.73"></a> |
| <span class="sourceLineNo">074</span><a name="line.74"></a> |
| <span class="sourceLineNo">075</span> private void cleanUpAndReportFailure(IOException error) throws IOException {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> LOG.warn("Failed to open region {}, will report to master", regionInfo.getRegionNameAsString(),<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> error);<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> HRegionServer rs = getServer();<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> rs.getRegionsInTransitionInRS().remove(regionInfo.getEncodedNameAsBytes(), Boolean.TRUE);<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> if (!rs.reportRegionStateTransition(new RegionStateTransitionContext(TransitionCode.FAILED_OPEN,<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> HConstants.NO_SEQNUM, openProcId, masterSystemTime, regionInfo))) {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> throw new IOException(<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> "Failed to report failed open to master: " + regionInfo.getRegionNameAsString());<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span><a name="line.86"></a> |
| <span class="sourceLineNo">087</span> @Override<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> public void process() throws IOException {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> HRegionServer rs = getServer();<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> String encodedName = regionInfo.getEncodedName();<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> byte[] encodedNameBytes = regionInfo.getEncodedNameAsBytes();<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> String regionName = regionInfo.getRegionNameAsString();<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> Region onlineRegion = rs.getRegion(encodedName);<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> if (onlineRegion != null) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> LOG.warn("Received OPEN for {} which is already online", regionName);<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> // Just follow the old behavior, do we need to call reportRegionStateTransition? Maybe not?<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> // For normal case, it could happen that the rpc call to schedule this handler is succeeded,<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> // but before returning to master the connection is broken. And when master tries again, we<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> // have already finished the opening. For this case we do not need to call<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> // reportRegionStateTransition any more.<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> return;<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> Boolean previous = rs.getRegionsInTransitionInRS().putIfAbsent(encodedNameBytes, Boolean.TRUE);<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> if (previous != null) {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> if (previous) {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> // The region is opening and this maybe a retry on the rpc call, it is safe to ignore it.<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> LOG.info("Receiving OPEN for {} which we are already trying to OPEN" +<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> " - ignoring this new request for this region.", regionName);<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> } else {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> // The region is closing. This is possible as we will update the region state to CLOSED when<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> // calling reportRegionStateTransition, so the HMaster will think the region is offline,<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> // before we actually close the region, as reportRegionStateTransition is part of the<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> // closing process.<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> long backoff = retryCounter.getBackoffTimeAndIncrementAttempts();<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> LOG.info(<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> "Receiving OPEN for {} which we are trying to close, try again after {}ms",<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> regionName, backoff);<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> rs.getExecutorService().delayedSubmit(this, backoff, TimeUnit.MILLISECONDS);<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> }<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> return;<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> }<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> LOG.info("Open {}", regionName);<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> HRegion region;<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> try {<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> TableDescriptor htd =<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> tableDesc != null ? tableDesc : rs.getTableDescriptors().get(regionInfo.getTable());<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> if (htd == null) {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> throw new IOException("Missing table descriptor for " + regionName);<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> // pass null for the last parameter, which used to be a CancelableProgressable, as now the<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> // opening can not be interrupted by a close request any more.<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> region = HRegion.openHRegion(regionInfo, htd, rs.getWAL(regionInfo), rs.getConfiguration(),<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> rs, null);<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> } catch (IOException e) {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> cleanUpAndReportFailure(e);<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> return;<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> // From here on out, this is PONR. We can not revert back. The only way to address an<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> // exception from here on out is to abort the region server.<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> rs.postOpenDeployTasks(new PostOpenDeployContext(region, openProcId, masterSystemTime));<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> rs.addRegion(region);<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> LOG.info("Opened {}", regionName);<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> // Cache the open region procedure id after report region transition succeed.<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> rs.finishRegionProcedure(openProcId);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> Boolean current = rs.getRegionsInTransitionInRS().remove(regionInfo.getEncodedNameAsBytes());<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> if (current == null) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> // Should NEVER happen, but let's be paranoid.<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> LOG.error("Bad state: we've just opened {} which was NOT in transition", regionName);<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> } else if (!current) {<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> // Should NEVER happen, but let's be paranoid.<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> LOG.error("Bad state: we've just opened {} which was closing", regionName);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> }<a name="line.153"></a> |
| <span class="sourceLineNo">154</span><a name="line.154"></a> |
| <span class="sourceLineNo">155</span> @Override<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> protected void handleException(Throwable t) {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> LOG.warn("Fatal error occurred while opening region {}, aborting...",<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> regionInfo.getRegionNameAsString(), t);<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> // Clear any reference in getServer().getRegionsInTransitionInRS() otherwise can hold up<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> // regionserver abort on cluster shutdown. HBASE-23984.<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> getServer().getRegionsInTransitionInRS().remove(regionInfo.getEncodedNameAsBytes());<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> getServer().abort(<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> "Failed to open region " + regionInfo.getRegionNameAsString() + " and can not recover", t);<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> public static AssignRegionHandler create(HRegionServer server, RegionInfo regionInfo,<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> long openProcId, TableDescriptor tableDesc, long masterSystemTime) {<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> EventType eventType;<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> if (regionInfo.isMetaRegion()) {<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> eventType = EventType.M_RS_OPEN_META;<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> } else if (regionInfo.getTable().isSystemTable() ||<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> (tableDesc != null && tableDesc.getPriority() >= HConstants.ADMIN_QOS)) {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> eventType = EventType.M_RS_OPEN_PRIORITY_REGION;<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> } else {<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> eventType = EventType.M_RS_OPEN_REGION;<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> }<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> return new AssignRegionHandler(server, regionInfo, openProcId, tableDesc, masterSystemTime,<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> eventType);<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> }<a name="line.179"></a> |
| <span class="sourceLineNo">180</span>}<a name="line.180"></a> |
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