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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.master;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import org.apache.hadoop.hbase.HConstants;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.TableName;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.regionserver.AnnotationReadingPriorityFunction;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.regionserver.RSRpcServices;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.security.User;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span><a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hbase.thirdparty.com.google.protobuf.Message;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span>/**<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * Priority function specifically for the master.<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> *<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * This doesn't make the super users always priority since that would make everything<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * to the master into high priority.<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> *<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * Specifically when reporting that a region is in transition master will try and edit the meta<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * table. That edit will block the thread until successful. However if at the same time meta is<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * also moving then we need to ensure that the regular region that's moving isn't blocking<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * processing of the request to online meta. To accomplish this this priority function makes sure<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * that all requests to transition meta are handled in different threads from other report region<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * in transition calls.<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * After HBASE-21754, ReportRegionStateTransitionRequest for meta region will be assigned a META_QOS<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * , a separate executor called metaTransitionExecutor will execute it. Other transition request<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * will be executed in priorityExecutor to prevent being mixed with normal requests<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> */<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>@InterfaceAudience.Private<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>public class MasterAnnotationReadingPriorityFunction extends AnnotationReadingPriorityFunction {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> public static final int META_TRANSITION_QOS = 300;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> public MasterAnnotationReadingPriorityFunction(final RSRpcServices rpcServices) {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> this(rpcServices, rpcServices.getClass());<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> }<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> public MasterAnnotationReadingPriorityFunction(RSRpcServices rpcServices,<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> Class<? extends RSRpcServices> clz) {<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> super(rpcServices, clz);<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> @Override<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> public int getPriority(RPCProtos.RequestHeader header, Message param, User user) {<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> // Yes this is copy pasted from the base class but it keeps from having to look in the<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> // annotatedQos table twice something that could get costly since this is called for<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> // every single RPC request.<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> int priorityByAnnotation = getAnnotatedPriority(header);<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> if (priorityByAnnotation >= 0) {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> // no one can have higher priority than meta transition.<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> if (priorityByAnnotation >= META_TRANSITION_QOS) {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> return META_TRANSITION_QOS - 1;<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> } else {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> return priorityByAnnotation;<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> }<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> }<a name="line.78"></a> |
| <span class="sourceLineNo">079</span><a name="line.79"></a> |
| <span class="sourceLineNo">080</span> // If meta is moving then all the other of reports of state transitions will be<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> // un able to edit meta. Those blocked reports should not keep the report that opens meta from<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> // running. Hence all reports of meta transition should always be in a different thread.<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> // This keeps from deadlocking the cluster.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> if (param instanceof RegionServerStatusProtos.ReportRegionStateTransitionRequest) {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> // Regions are moving. Lets see which ones.<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> RegionServerStatusProtos.ReportRegionStateTransitionRequest tRequest =<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> (RegionServerStatusProtos.ReportRegionStateTransitionRequest) param;<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> for (RegionServerStatusProtos.RegionStateTransition rst : tRequest.getTransitionList()) {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> if (rst.getRegionInfoList() != null) {<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> for (HBaseProtos.RegionInfo info : rst.getRegionInfoList()) {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> TableName tn = ProtobufUtil.toTableName(info.getTableName());<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> if (TableName.META_TABLE_NAME.equals(tn)) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> return META_TRANSITION_QOS;<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> }<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> return HConstants.HIGH_QOS;<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> }<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> // also use HIGH_QOS for region server report<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> if (param instanceof RegionServerStatusProtos.RegionServerReportRequest) {<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> return HConstants.HIGH_QOS;<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> }<a name="line.103"></a> |
| <span class="sourceLineNo">104</span><a name="line.104"></a> |
| <span class="sourceLineNo">105</span> // Handle the rest of the different reasons to change priority.<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> return getBasePriority(header, param);<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> |
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