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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.regionserver;</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.security.PrivilegedAction;</span> |
| <span class="source-line-no">021</span><span id="line-21">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.client.RegionInfo;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.client.RegionInfoBuilder;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.regionserver.RegionServerServices.RegionStateTransitionContext;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.security.User;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.slf4j.Logger;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">031</span><span id="line-31"></span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;</span> |
| <span class="source-line-no">033</span><span id="line-33"></span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;</span> |
| <span class="source-line-no">035</span><span id="line-35"></span> |
| <span class="source-line-no">036</span><span id="line-36">/**</span> |
| <span class="source-line-no">037</span><span id="line-37"> * Handles processing region splits. Put in a queue, owned by HRegionServer.</span> |
| <span class="source-line-no">038</span><span id="line-38"> */</span> |
| <span class="source-line-no">039</span><span id="line-39">@InterfaceAudience.Private</span> |
| <span class="source-line-no">040</span><span id="line-40">class SplitRequest implements Runnable {</span> |
| <span class="source-line-no">041</span><span id="line-41"> private static final Logger LOG = LoggerFactory.getLogger(SplitRequest.class);</span> |
| <span class="source-line-no">042</span><span id="line-42"> private final RegionInfo parent;</span> |
| <span class="source-line-no">043</span><span id="line-43"> private final byte[] midKey;</span> |
| <span class="source-line-no">044</span><span id="line-44"> private final HRegionServer server;</span> |
| <span class="source-line-no">045</span><span id="line-45"> private final User user;</span> |
| <span class="source-line-no">046</span><span id="line-46"></span> |
| <span class="source-line-no">047</span><span id="line-47"> SplitRequest(Region region, byte[] midKey, HRegionServer hrs, User user) {</span> |
| <span class="source-line-no">048</span><span id="line-48"> Preconditions.checkNotNull(hrs);</span> |
| <span class="source-line-no">049</span><span id="line-49"> this.parent = region.getRegionInfo();</span> |
| <span class="source-line-no">050</span><span id="line-50"> this.midKey = midKey;</span> |
| <span class="source-line-no">051</span><span id="line-51"> this.server = hrs;</span> |
| <span class="source-line-no">052</span><span id="line-52"> this.user = user;</span> |
| <span class="source-line-no">053</span><span id="line-53"> }</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> @Override</span> |
| <span class="source-line-no">056</span><span id="line-56"> public String toString() {</span> |
| <span class="source-line-no">057</span><span id="line-57"> return "regionName=" + parent + ", midKey=" + Bytes.toStringBinary(midKey);</span> |
| <span class="source-line-no">058</span><span id="line-58"> }</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60"> private void doSplitting() {</span> |
| <span class="source-line-no">061</span><span id="line-61"> server.getMetrics().incrSplitRequest();</span> |
| <span class="source-line-no">062</span><span id="line-62"> if (user != null && user.getUGI() != null) {</span> |
| <span class="source-line-no">063</span><span id="line-63"> user.getUGI().doAs((PrivilegedAction<Void>) () -> {</span> |
| <span class="source-line-no">064</span><span id="line-64"> requestRegionSplit();</span> |
| <span class="source-line-no">065</span><span id="line-65"> return null;</span> |
| <span class="source-line-no">066</span><span id="line-66"> });</span> |
| <span class="source-line-no">067</span><span id="line-67"> } else {</span> |
| <span class="source-line-no">068</span><span id="line-68"> requestRegionSplit();</span> |
| <span class="source-line-no">069</span><span id="line-69"> }</span> |
| <span class="source-line-no">070</span><span id="line-70"> }</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> private void requestRegionSplit() {</span> |
| <span class="source-line-no">073</span><span id="line-73"> final TableName table = parent.getTable();</span> |
| <span class="source-line-no">074</span><span id="line-74"> final RegionInfo hri_a = RegionInfoBuilder.newBuilder(table).setStartKey(parent.getStartKey())</span> |
| <span class="source-line-no">075</span><span id="line-75"> .setEndKey(midKey).build();</span> |
| <span class="source-line-no">076</span><span id="line-76"> final RegionInfo hri_b =</span> |
| <span class="source-line-no">077</span><span id="line-77"> RegionInfoBuilder.newBuilder(table).setStartKey(midKey).setEndKey(parent.getEndKey()).build();</span> |
| <span class="source-line-no">078</span><span id="line-78"> // Send the split request to the master. the master will do the validation on the split-key.</span> |
| <span class="source-line-no">079</span><span id="line-79"> // The parent region will be unassigned and the two new regions will be assigned.</span> |
| <span class="source-line-no">080</span><span id="line-80"> // hri_a and hri_b objects may not reflect the regions that will be created, those objects</span> |
| <span class="source-line-no">081</span><span id="line-81"> // are created just to pass the information to the reportRegionStateTransition().</span> |
| <span class="source-line-no">082</span><span id="line-82"> if (</span> |
| <span class="source-line-no">083</span><span id="line-83"> !server.reportRegionStateTransition(new RegionStateTransitionContext(</span> |
| <span class="source-line-no">084</span><span id="line-84"> TransitionCode.READY_TO_SPLIT, HConstants.NO_SEQNUM, -1, -1, parent, hri_a, hri_b))</span> |
| <span class="source-line-no">085</span><span id="line-85"> ) {</span> |
| <span class="source-line-no">086</span><span id="line-86"> LOG.error("Unable to ask master to split " + parent.getRegionNameAsString());</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</span> |
| <span class="source-line-no">088</span><span id="line-88"> }</span> |
| <span class="source-line-no">089</span><span id="line-89"></span> |
| <span class="source-line-no">090</span><span id="line-90"> @Override</span> |
| <span class="source-line-no">091</span><span id="line-91"> public void run() {</span> |
| <span class="source-line-no">092</span><span id="line-92"> if (this.server.isStopping() || this.server.isStopped()) {</span> |
| <span class="source-line-no">093</span><span id="line-93"> LOG.debug("Skipping split because server is stopping=" + this.server.isStopping()</span> |
| <span class="source-line-no">094</span><span id="line-94"> + " or stopped=" + this.server.isStopped());</span> |
| <span class="source-line-no">095</span><span id="line-95"> return;</span> |
| <span class="source-line-no">096</span><span id="line-96"> }</span> |
| <span class="source-line-no">097</span><span id="line-97"></span> |
| <span class="source-line-no">098</span><span id="line-98"> doSplitting();</span> |
| <span class="source-line-no">099</span><span id="line-99"> }</span> |
| <span class="source-line-no">100</span><span id="line-100">}</span> |
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