| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html lang="en"> |
| <head> |
| <title>Source code</title> |
| <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body> |
| <div class="sourceContainer"> |
| <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.ipc.AnnotationReadingPriorityFunction;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hbase.thirdparty.com.google.protobuf.Message;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span><a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span><a name="line.31"></a> |
| <span class="sourceLineNo">032</span>/**<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * Priority function specifically for the master.<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * <p/><a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * This doesn't make the super users always priority since that would make everything to the master<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * into high priority.<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * <p/><a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * Specifically when reporting that a region is in transition master will try and edit the meta<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * table. That edit will block the thread until successful. However if at the same time meta is also<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * moving then we need to ensure that the regular region that's moving isn't blocking processing of<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * the request to online meta. To accomplish this this priority function makes sure that all<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * requests to transition meta are handled in different threads from other report region in<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * transition calls.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * <p/><a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * After HBASE-21754, ReportRegionStateTransitionRequest for meta region will be assigned a META_QOS<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * , a separate executor called metaTransitionExecutor will execute it. Other transition request<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * will be executed in priorityExecutor to prevent being mixed with normal requests<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> */<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>@InterfaceAudience.Private<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>public class MasterAnnotationReadingPriorityFunction<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> extends AnnotationReadingPriorityFunction<MasterRpcServices> {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> /**<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * We reference this value in SimpleRpcScheduler so this class have to be public instead of<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * package private<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> */<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public static final int META_TRANSITION_QOS = 300;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> MasterAnnotationReadingPriorityFunction(MasterRpcServices rpcServices) {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> super(rpcServices);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> }<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> @Override<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> protected int normalizePriority(int priority) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> // no one can have higher priority than meta transition.<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> if (priority >= META_TRANSITION_QOS) {<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> return META_TRANSITION_QOS - 1;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> } else {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> return priority;<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><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> @Override<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> protected int getBasePriority(RequestHeader header, Message param) {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> // If meta is moving then all the other of reports of state transitions will be<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> // un able to edit meta. Those blocked reports should not keep the report that opens meta from<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> // running. Hence all reports of meta transition should always be in a different thread.<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> // This keeps from deadlocking the cluster.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> if (param instanceof RegionServerStatusProtos.ReportRegionStateTransitionRequest) {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> // Regions are moving. Lets see which ones.<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> RegionServerStatusProtos.ReportRegionStateTransitionRequest tRequest =<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> (RegionServerStatusProtos.ReportRegionStateTransitionRequest) param;<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> for (RegionServerStatusProtos.RegionStateTransition rst : tRequest.getTransitionList()) {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> if (rst.getRegionInfoList() != null) {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> for (HBaseProtos.RegionInfo info : rst.getRegionInfoList()) {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> TableName tn = ProtobufUtil.toTableName(info.getTableName());<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> if (TableName.META_TABLE_NAME.equals(tn)) {<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> return META_TRANSITION_QOS;<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> }<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> }<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> }<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> }<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> return HConstants.HIGH_QOS;<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> // also use HIGH_QOS for region server report<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> if (param instanceof RegionServerStatusProtos.RegionServerReportRequest) {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> return HConstants.HIGH_QOS;<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> // Trust the client-set priorities if set<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> if (header.hasPriority()) {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> return header.getPriority();<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> return HConstants.NORMAL_QOS;<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> }<a name="line.104"></a> |
| <span class="sourceLineNo">105</span><a name="line.105"></a> |
| <span class="sourceLineNo">106</span> @Override<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> public long getDeadline(RequestHeader header, Message param) {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> return 0;<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> }<a name="line.109"></a> |
| <span class="sourceLineNo">110</span>}<a name="line.110"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </body> |
| </html> |
