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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;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.security.PrivilegedAction;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.HConstants;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.TableName;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.client.RegionInfoBuilder;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.regionserver.RegionServerServices.RegionStateTransitionContext;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.security.User;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.slf4j.Logger;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.slf4j.LoggerFactory;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span><a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span>/**<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * Handles processing region splits. Put in a queue, owned by HRegionServer.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> */<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>@InterfaceAudience.Private<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>class SplitRequest implements Runnable {<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> private static final Logger LOG = LoggerFactory.getLogger(SplitRequest.class);<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private final RegionInfo parent;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> private final byte[] midKey;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> private final HRegionServer server;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> private final User user;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span><a name="line.46"></a> |
| <span class="sourceLineNo">047</span> SplitRequest(Region region, byte[] midKey, HRegionServer hrs, User user) {<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> Preconditions.checkNotNull(hrs);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> this.parent = region.getRegionInfo();<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> this.midKey = midKey;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> this.server = hrs;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> this.user = user;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> }<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> @Override<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> public String toString() {<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> return "regionName=" + parent + ", midKey=" + Bytes.toStringBinary(midKey);<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> }<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> private void doSplitting() {<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> server.getMetrics().incrSplitRequest();<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> if (user != null && user.getUGI() != null) {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> user.getUGI().doAs((PrivilegedAction<Void>) () -> {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> requestRegionSplit();<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> return null;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> });<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> } else {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> requestRegionSplit();<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><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> private void requestRegionSplit() {<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> final TableName table = parent.getTable();<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> final RegionInfo hri_a = RegionInfoBuilder.newBuilder(table).setStartKey(parent.getStartKey())<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> .setEndKey(midKey).build();<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> final RegionInfo hri_b =<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> RegionInfoBuilder.newBuilder(table).setStartKey(midKey).setEndKey(parent.getEndKey()).build();<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> // Send the split request to the master. the master will do the validation on the split-key.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> // The parent region will be unassigned and the two new regions will be assigned.<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> // hri_a and hri_b objects may not reflect the regions that will be created, those objects<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> // are created just to pass the information to the reportRegionStateTransition().<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> if (<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> !server.reportRegionStateTransition(new RegionStateTransitionContext(<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> TransitionCode.READY_TO_SPLIT, HConstants.NO_SEQNUM, -1, parent, hri_a, hri_b))<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> ) {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> LOG.error("Unable to ask master to split " + parent.getRegionNameAsString());<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> }<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> }<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> @Override<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> public void run() {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> if (this.server.isStopping() || this.server.isStopped()) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> LOG.debug("Skipping split because server is stopping=" + this.server.isStopping()<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> + " or stopped=" + this.server.isStopped());<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> return;<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span><a name="line.97"></a> |
| <span class="sourceLineNo">098</span> doSplitting();<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> }<a name="line.99"></a> |
| <span class="sourceLineNo">100</span>}<a name="line.100"></a> |
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