Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8304033

JFR: Missing thread

    XMLWordPrintable

Details

    • Bug
    • Resolution: Fixed
    • P1
    • 21
    • 17, 20, 21
    • hotspot
    • jfr
    • b17
    • Not verified

    Description

      Reproducer:

      $ java -XX:StartFlightRecording:filename=r.jfr -jar jdk/demo/jfc/J2Ddemo/J2Ddemo.jar
      Click around on the different tabs.
      $ jfr print --events ThreadStart r.jfr

      jdk.ThreadStart {
        startTime = 19:50:04.836 (2023-03-12)
        thread = N/A
        parentThread = N/A
      }

      Note, might be OK for parent thread to be null (if it's the main thread), both event thread (hidden if null) and the thread field is N/A. Missing thread can also be observed in ExecutionSample.

      jdk.ExecutionSample {
        startTime = 16:02:06.365 (2023-03-05)
        sampledThread = N/A
        state = "STATE_RUNNABLE"
        stackTrace = [
          sun.lwawt.macosx.LWCToolkit.getPlatformWindowUnderMouse() line: 1038
          sun.lwawt.LWWindowPeer.notifyMouseEvent(int, long, int, int, int, int, int, int, int, boolean, byte[]) line: 856
          sun.lwawt.macosx.CPlatformResponder.handleMouseEvent(int, int, int, int, int, int, int, int) line: 92
          sun.lwawt.macosx.CPlatformView.deliverMouseEvent(NSEvent) line: 195
        ]
      }

      The missing threads seems to happen in the first 3-4 seconds of the recording or chunk, but I can't rule out that it happens later as well. Only looked at recording/chunk that lasted for a minute (one chunk) running on Mac.

      I = High, information missing
      L = M, happens sometimes with JFR
      W = H, no known workaround

      HMH -> P1

      Attachments

        Issue Links

          Activity

            People

              mgronlun Markus Grönlund
              egahlin Erik Gahlin
              Votes:
              0 Vote for this issue
              Watchers:
              5 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: