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  1. JDK
  2. JDK-8219721

jcmd from earlier release will hang attaching to VM with JDK-8215622 applied

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Details

    • Bug
    • Resolution: Fixed
    • P2
    • 13
    • 13
    • core-svc
    • 13
    • b12

    Description

      https://mail.openjdk.java.net/pipermail/serviceability-dev/2019-February/027240.html


      When I attached to VM which is after 8215622 change via jcmd in JDK 8 on Linux, jcmd hanged.
      I checked the status of target VM and jcmd, LinuxAttachListener::read_request() on target VM was waiting for
      subsequent argument.

      JDK-8215622 increased number of arguments of Attach API [1].
      Thus AttachListener will be waiting the command from client infinitely.


      [1] http://hg.openjdk.java.net/jdk/jdk/rev/e7cf035682e3#l2.1

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8221730 jcmd process name matching broken

          • P3 - Major loss of function.
          • Resolved

          Enhancement - null JDK-8219896 Parameter size mismatch between client and VM sides of the Attach API

          • P3 - Major loss of function.
          • Open

          Sub-task - The sub-task of the issue JDK-8215622 Add dump to file support for jmap –histo

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Enhancement - null JDK-8337517 Redacted Heap Dumps

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Open

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              dholmes David Holmes
              ysuenaga Yasumasa Suenaga
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                Created:
                Updated:
                Resolved: