| /** |
| * 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 com.alibaba.jstorm.metric; |
| |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.ThreadInfo; |
| import java.lang.management.ThreadMXBean; |
| |
| import com.codahale.metrics.Gauge; |
| |
| public class MetricJstack implements Gauge<String> { |
| |
| private String getTaskName(long id, String name) { |
| if (name == null) { |
| return Long.toString(id); |
| } |
| return id + " (" + name + ")"; |
| } |
| |
| public String dumpThread() throws Exception { |
| StringBuilder writer = new StringBuilder(); |
| |
| ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); |
| |
| boolean contention = threadMXBean.isThreadContentionMonitoringEnabled(); |
| |
| long[] threadIds = threadMXBean.getAllThreadIds(); |
| writer.append(threadIds.length + " active threads:"); |
| for (long tid : threadIds) { |
| writer.append(tid).append(" "); |
| } |
| writer.append("\n"); |
| |
| long[] deadLockTids = threadMXBean.findDeadlockedThreads(); |
| if (deadLockTids != null) { |
| writer.append(threadIds.length + " deadlocked threads:"); |
| for (long tid : deadLockTids) { |
| writer.append(tid).append(" "); |
| } |
| writer.append("\n"); |
| } |
| |
| long[] deadLockMonitorTids = threadMXBean.findMonitorDeadlockedThreads(); |
| if (deadLockMonitorTids != null) { |
| writer.append(threadIds.length + " deadlocked monitor threads:"); |
| for (long tid : deadLockMonitorTids) { |
| writer.append(tid).append(" "); |
| } |
| writer.append("\n"); |
| } |
| |
| for (long tid : threadIds) { |
| ThreadInfo info = threadMXBean.getThreadInfo(tid, Integer.MAX_VALUE); |
| if (info == null) { |
| writer.append(" Inactive").append("\n"); |
| continue; |
| } |
| writer.append("Thread " + getTaskName(info.getThreadId(), info.getThreadName()) + ":").append("\n"); |
| Thread.State state = info.getThreadState(); |
| writer.append(" State: " + state).append("\n"); |
| writer.append(" Blocked count: " + info.getBlockedCount()).append("\n"); |
| writer.append(" Waited count: " + info.getWaitedCount()).append("\n"); |
| writer.append(" Cpu time:").append(threadMXBean.getThreadCpuTime(tid) / 1000000).append("ms").append("\n"); |
| writer.append(" User time:").append(threadMXBean.getThreadUserTime(tid) / 1000000).append("ms").append("\n"); |
| if (contention) { |
| writer.append(" Blocked time: " + info.getBlockedTime()).append("\n"); |
| writer.append(" Waited time: " + info.getWaitedTime()).append("\n"); |
| } |
| if (state == Thread.State.WAITING) { |
| writer.append(" Waiting on " + info.getLockName()).append("\n"); |
| } else if (state == Thread.State.BLOCKED) { |
| writer.append(" Blocked on " + info.getLockName()).append("\n"); |
| writer.append(" Blocked by " + getTaskName(info.getLockOwnerId(), info.getLockOwnerName())).append("\n"); |
| } |
| |
| } |
| for (long tid : threadIds) { |
| ThreadInfo info = threadMXBean.getThreadInfo(tid, Integer.MAX_VALUE); |
| if (info == null) { |
| writer.append(" Inactive").append("\n"); |
| continue; |
| } |
| |
| writer.append("Thread " + getTaskName(info.getThreadId(), info.getThreadName()) + ": Stack").append("\n"); |
| for (StackTraceElement frame : info.getStackTrace()) { |
| writer.append(" " + frame.toString()).append("\n"); |
| } |
| } |
| |
| return writer.toString(); |
| } |
| |
| @Override |
| public String getValue() { |
| try { |
| return dumpThread(); |
| } catch (Exception e) { |
| return "Failed to get jstack thread info"; |
| } |
| } |
| |
| } |