IZ81155: ATTACH API INITIALIZATION IS SLOW ON Z/OS UNDER HEAVY LOAD

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: Attach API takes minutes to initialize on heavily
    loaded z/OS systems.
    .
    Stack Trace: The javacores show the following stack:
       3XMTHREADINFO      "Attach handler" (TID:0x2293BF00,
    sys_thread_t:0x2283FDF8, state:R, native ID:0x18A01F00) prio=5
       4XESTACKTRACE          at
    com/ibm/tools/attach/javaSE/IPC.processExistsImpl(Native Method)
       4XESTACKTRACE          at
    com/ibm/tools/attach/javaSE/IPC.processExists(IPC.java:121)
       4XESTACKTRACE          at
    com/ibm/tools/attach/javaSE/CommonDirectory.deleteStaleDirectori
    es(CommonDirectory.java:365)
       4XESTACKTRACE          at
    com/ibm/tools/attach/javaSE/AttachHandler.createFiles(AttachHand
    ler.java:140)
    .
    

Local fix

Problem summary

  • The problem is caused by slow performance of a heavily used
    system call on heavily loaded z/OS systems.
    

Problem conclusion

  • This defect will be fixed in:
    5.0.0 SR13
    6.0.0 SR9
    .
      The JVM has been updated to use a different system call and a
    more efficient algorithm.
    .
    To obtain the fix:
    Install build 20100819 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ81155

  • Reported component name

    JAVA 5 J9 COMMO

  • Reported component ID

    620500127

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-07-29

  • Closed date

    2010-08-20

  • Last modified date

    2010-08-20

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

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

    IZ81167

Fix information

  • Fixed component name

    JAVA 5 J9 COMMO

  • Fixed component ID

    620500127

Applicable component levels

  • R500 PSN

       UP



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Document information


More support for:

Runtimes for Java Technology
Virtual Machine

Software version:

5.0

Reference #:

IZ81155

Modified date:

2010-08-20

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