| /** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hbase.master.http; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.PrintStream; |
| import java.io.PrintWriter; |
| import java.util.Date; |
| import java.util.Map; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.ServerMetrics; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.master.HMaster; |
| import org.apache.hadoop.hbase.master.ServerManager; |
| import org.apache.hadoop.hbase.master.assignment.AssignmentManager; |
| import org.apache.hadoop.hbase.master.assignment.RegionStateNode; |
| import org.apache.hadoop.hbase.monitoring.StateDumpServlet; |
| import org.apache.hadoop.hbase.monitoring.TaskMonitor; |
| import org.apache.hadoop.hbase.regionserver.http.RSDumpServlet; |
| import org.apache.hadoop.hbase.util.LogMonitoring; |
| import org.apache.hadoop.hbase.util.Threads; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| @InterfaceAudience.Private |
| public class MasterDumpServlet extends StateDumpServlet { |
| private static final long serialVersionUID = 1L; |
| private static final String LINE = |
| "==========================================================="; |
| |
| @Override |
| public void doGet(HttpServletRequest request, HttpServletResponse response) |
| throws IOException { |
| HMaster master = (HMaster) getServletContext().getAttribute(HMaster.MASTER); |
| assert master != null : "No Master in context!"; |
| |
| response.setContentType("text/plain"); |
| OutputStream os = response.getOutputStream(); |
| try (PrintWriter out = new PrintWriter(os)) { |
| |
| out.println("Master status for " + master.getServerName() |
| + " as of " + new Date()); |
| |
| out.println("\n\nVersion Info:"); |
| out.println(LINE); |
| dumpVersionInfo(out); |
| |
| out.println("\n\nTasks:"); |
| out.println(LINE); |
| TaskMonitor.get().dumpAsText(out); |
| |
| out.println("\n\nServers:"); |
| out.println(LINE); |
| dumpServers(master, out); |
| |
| out.println("\n\nRegions-in-transition:"); |
| out.println(LINE); |
| dumpRIT(master, out); |
| |
| out.println("\n\nExecutors:"); |
| out.println(LINE); |
| dumpExecutors(master.getExecutorService(), out); |
| |
| out.println("\n\nStacks:"); |
| out.println(LINE); |
| out.flush(); |
| PrintStream ps = new PrintStream(response.getOutputStream(), false, "UTF-8"); |
| Threads.printThreadInfo(ps, ""); |
| ps.flush(); |
| |
| out.println("\n\nMaster configuration:"); |
| out.println(LINE); |
| Configuration conf = master.getConfiguration(); |
| out.flush(); |
| conf.writeXml(os); |
| os.flush(); |
| |
| out.println("\n\nRecent regionserver aborts:"); |
| out.println(LINE); |
| master.getRegionServerFatalLogBuffer().dumpTo(out); |
| |
| out.println("\n\nLogs"); |
| out.println(LINE); |
| long tailKb = getTailKbParam(request); |
| LogMonitoring.dumpTailOfLogs(out, tailKb); |
| |
| out.println("\n\nRS Queue:"); |
| out.println(LINE); |
| if (isShowQueueDump(conf)) { |
| RSDumpServlet.dumpQueue(master, out); |
| } |
| out.flush(); |
| } |
| } |
| |
| |
| private void dumpRIT(HMaster master, PrintWriter out) { |
| AssignmentManager am = master.getAssignmentManager(); |
| if (am == null) { |
| out.println("AssignmentManager is not initialized"); |
| return; |
| } |
| |
| for (RegionStateNode rs : am.getRegionsInTransition()) { |
| String rid = rs.getRegionInfo().getEncodedName(); |
| out.println("Region " + rid + ": " + rs.toDescriptiveString()); |
| } |
| } |
| |
| private void dumpServers(HMaster master, PrintWriter out) { |
| ServerManager sm = master.getServerManager(); |
| if (sm == null) { |
| out.println("ServerManager is not initialized"); |
| return; |
| } |
| |
| Map<ServerName, ServerMetrics> servers = sm.getOnlineServers(); |
| for (Map.Entry<ServerName, ServerMetrics> e : servers.entrySet()) { |
| out.println(e.getKey() + ": " + e.getValue()); |
| } |
| } |
| } |