| /** |
| * |
| * 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.regionserver; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.PrintStream; |
| import java.io.PrintWriter; |
| import java.util.Date; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.monitoring.LogMonitoring; |
| import org.apache.hadoop.hbase.monitoring.StateDumpServlet; |
| import org.apache.hadoop.hbase.monitoring.TaskMonitor; |
| import org.apache.hadoop.hbase.util.Threads; |
| |
| @InterfaceAudience.Private |
| public class RSDumpServlet extends StateDumpServlet { |
| private static final long serialVersionUID = 1L; |
| private static final String LINE = |
| "==========================================================="; |
| |
| @Override |
| public void doGet(HttpServletRequest request, HttpServletResponse response) |
| throws IOException { |
| HRegionServer hrs = (HRegionServer)getServletContext().getAttribute( |
| HRegionServer.REGIONSERVER); |
| assert hrs != null : "No RS in context!"; |
| |
| response.setContentType("text/plain"); |
| |
| if (!hrs.isOnline()) { |
| response.getWriter().write("The RegionServer is initializing!"); |
| response.getWriter().close(); |
| return; |
| } |
| |
| OutputStream os = response.getOutputStream(); |
| PrintWriter out = new PrintWriter(os); |
| |
| out.println("RegionServer status for " + hrs.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\nRowLocks:"); |
| out.println(LINE); |
| dumpRowLock(hrs, out); |
| |
| out.println("\n\nExecutors:"); |
| out.println(LINE); |
| dumpExecutors(hrs.getExecutorService(), out); |
| |
| out.println("\n\nStacks:"); |
| out.println(LINE); |
| PrintStream ps = new PrintStream(response.getOutputStream(), false, "UTF-8"); |
| Threads.printThreadInfo(ps, ""); |
| ps.flush(); |
| |
| out.println("\n\nRS Configuration:"); |
| out.println(LINE); |
| Configuration conf = hrs.getConfiguration(); |
| out.flush(); |
| conf.writeXml(os); |
| os.flush(); |
| |
| 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)) { |
| dumpQueue(hrs, out); |
| } |
| |
| out.flush(); |
| } |
| |
| public static void dumpRowLock(HRegionServer hrs, PrintWriter out) { |
| StringBuilder sb = new StringBuilder(); |
| for (Region region : hrs.getOnlineRegions()) { |
| HRegion hRegion = (HRegion)region; |
| if (hRegion.getLockedRows().size() > 0) { |
| for (HRegion.RowLockContext rowLockContext : hRegion.getLockedRows().values()) { |
| sb.setLength(0); |
| sb.append(hRegion.getTableDesc().getTableName()).append(",") |
| .append(hRegion.getRegionInfo().getEncodedName()).append(","); |
| sb.append(rowLockContext.toString()); |
| out.println(sb.toString()); |
| } |
| } |
| } |
| } |
| |
| public static void dumpQueue(HRegionServer hrs, PrintWriter out) |
| throws IOException { |
| if (hrs.compactSplitThread != null) { |
| // 1. Print out Compaction/Split Queue |
| out.println("Compaction/Split Queue summary: " |
| + hrs.compactSplitThread.toString() ); |
| out.println(hrs.compactSplitThread.dumpQueue()); |
| } |
| |
| if (hrs.cacheFlusher != null) { |
| // 2. Print out flush Queue |
| out.println("\nFlush Queue summary: " |
| + hrs.cacheFlusher.toString()); |
| out.println(hrs.cacheFlusher.dumpQueue()); |
| } |
| } |
| } |