Generate a Java thread dump without restarting.

Question

I\'d like to create a thread that keeps track of the memory usage and cpu usage.

If the application reaches a high level, I want to generate an heap dump or a thread

Answer 1

To dump the threads to the standard out, you may do something like this

ThreadInfo[] threads = ManagementFactory.getThreadMXBean()
        .dumpAllThreads(true, true);
for (ThreadInfo info : threads) {
    System.out.print(info);
}

in Java 6 using the ThreadMXBean class. But I would suggest to use real logging instead of the standard output.