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IV47664: JVMTI GETOBJECTMONITORUSAGE() RETURNS INVALID WAITERS AND NOTIFY_WAITERS COUNTS AND REFERENCES

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APAR status

  • Closed as program error.

Error description

  • Error Message: A SIGSEGV is received when the process attempts
    to access the waiters or notify_waiters returned by
    GetObjectMonitorUsage()
    .
    Stack Trace: Native Stack trace:
    getObjectMonitorOwner
    jvmtiGetObjectHashCode
    jdwp::ObjectReference::MonitorInfoHandler::Execute
    jdwp::SyncCommandHandler::Run
    jdwp::CommandDispatcher::ExecCommand
    jdwp::PacketDispatcher::Run
    jdwp::PacketDispatcher::StartFunction
    .
    

Local fix

Problem summary

  • The problem occurs when the state of the monitor gets modified
    while GetObjectMonitorUsage() is being executed.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR6
    6.0.1 SR7
    .
    The JVM has been updated to return consistent waiters and
    notify_waiters counts and references list.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV47664

  • Reported component name

    J9 COMMON CODE

  • Reported component ID

    620700127

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-08-28

  • Closed date

    2013-09-07

  • Last modified date

    2013-09-07

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    J9 COMMON CODE

  • Fixed component ID

    620700127

Applicable component levels

  • R260 PSY

       UP

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Document Information

Modified date:
21 February 2022