JVM异常退出原因追踪

package com.xx;

import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.LockInfo;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MonitorInfo;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.ArrayList;
import java.util.List;

public class Test{
	static {
		/**
		 * 打印JVM退出堆栈信息
		 */
		jvmExitHook();
	}

	public static void jvmExitHook() {
		System.out.println("注册JVM Shutdown钩子方法---------");
		Runtime.getRuntime().addShutdownHook(new Thread() {
			@Override
			public void run() {
				MemoryMXBean memorymbean = ManagementFactory.getMemoryMXBean();
				System.out.println("####################内存信息####################");
				System.out.println("Heap Memory: " + memorymbean.getHeapMemoryUsage());
				System.out.println("Non Heap Memory: " + memorymbean.getNonHeapMemoryUsage());

				List<GarbageCollectorMXBean> list = ManagementFactory.getGarbageCollectorMXBeans();
				if (list != null && list.size() > 0) {
					System.out.println("####################Gc信息####################");
					for (GarbageCollectorMXBean gcBean : list) {
						String s = "gc name=" + gcBean.getName() + ",gc count=" + gcBean.getCollectionCount() + ",gc time=" + gcBean.getCollectionTime();
						System.out.println(s);
					}
				}

				ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
				long[] ids = threadBean.getAllThreadIds();
				System.out.println("####################线程信息####################");
				for (long id : ids) {
					ThreadInfo threadInfo = threadBean.getThreadInfo(id, Integer.MAX_VALUE);
					if (threadInfo != null) {
						String s = "blockcount=" + threadInfo.getBlockedCount() + ",blocktime=" + threadInfo.getBlockedTime();
						s = s + ",waitedcount=" + threadInfo.getWaitedCount() + ",waitedtime=" + threadInfo.getWaitedTime();
						System.out.println(s);
						System.out.println(getThreadInfo(threadInfo));
					}
				}

				long[] deadlock_ids = threadBean.findDeadlockedThreads();
				if (deadlock_ids != null) {
					System.out.println("####################死锁信息####################");
					for (long id : deadlock_ids) {
						System.out.println("死锁的线程号：" + id);
					}
				}
			}

		});
	}

	public static String getThreadInfo(ThreadInfo t) {

		try {
			StringBuilder sb = new StringBuilder("\"" + t.getThreadName() + "\"" + " Id=" + t.getThreadId() + " " + t.getThreadState());
			if (t.getLockName() != null) {
				sb.append(" on " + t.getLockName());
			}
			if (t.getLockOwnerName() != null) {
				sb.append(" owned by \"" + t.getLockOwnerName() + "\" Id=" + t.getLockOwnerId());
			}
			if (t.isSuspended()) {
				sb.append(" (suspended)");
			}
			if (t.isInNative()) {
				sb.append(" (in native)");
			}
			sb.append('\n');
			int i = 0;
			for (StackTraceElement ste : t.getStackTrace()) {
				sb.append("\tat " + ste.toString());
				sb.append('\n');
				if (i == 0 && t.getLockInfo() != null) {
					Thread.State ts = t.getThreadState();
					switch (ts) {
					case BLOCKED:
						sb.append("\t-  blocked on " + t.getLockInfo());
						sb.append('\n');
						break;
					case WAITING:
						sb.append("\t-  waiting on " + t.getLockInfo());
						sb.append('\n');
						break;
					case TIMED_WAITING:
						sb.append("\t-  waiting on " + t.getLockInfo());
						sb.append('\n');
						break;
					default:
					}
				}

				for (MonitorInfo mi : t.getLockedMonitors()) {
					if (mi.getLockedStackDepth() == i) {
						sb.append("\t-  locked " + mi);
						sb.append('\n');
					}
				}
			}
			if (i < t.getStackTrace().length) {
				sb.append("\t...");
				sb.append('\n');
			}

			LockInfo[] locks = t.getLockedSynchronizers();
			if (locks.length > 0) {
				sb.append("\n\tNumber of locked synchronizers = " + locks.length);
				sb.append('\n');
				for (LockInfo li : locks) {
					sb.append("\t- " + li);
					sb.append('\n');
				}
			}
			sb.append('\n');
			return sb.toString();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return "";
	}
}

 找一个类，启动的时候注册进去JVM退出的钩子方法

由于ThreadInfo默认只打出8行堆栈内容，可能会错过我们需要的报错信息。所以改写了toString方法