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javamultithreadingdaemonjvisualvm

getting a list of running non-daemon threads in jvisualvm

I am troubleshooting a shutdown that is not as graceful as it should be, so I would like to get a list of running non-daemon threads in jvisualvm (or other) to hunt the culprit.

Solution

  • jstack dumps all threads, there is a text that would tell if it is daemon or not

    ( jvisualvm produces same output in 'ThreadDump'- See this link for more useful documentation

     "Reference Handler" daemon prio=10 tid=0x00a98400 nid=0x1ee8 in Object.wait() [0x00b6f000]
           java.lang.Thread.State: WAITING (on object monitor)
                at java.lang.Object.wait(Native Method)
                at java.lang.Object.wait(Object.java:485)
                at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
                - locked <0x19835fa0> (a java.lang.ref.Reference$Lock)
    
    "VM Thread" prio=10 tid=0x00a95800 nid=0x264 runnable