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PI87181: JVMSERVER statistics don't show GC collections with Java 8 SR 5

A fix is available

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APAR status

  • Closed as program error.

Error description

  • JVMSERVER statistics don't show GC collections with Java 8 SR 5.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All CICS users.                              *
    ****************************************************************
    * PROBLEM DESCRIPTION: Garbage Collection statistics return    *
    *                      zero with Java 8 SR 5.                  *
    ****************************************************************
    Java 8 Service Refresh 5 is a significant enhancement to the
    Java Virtual Machine. The JVM's internal Garbage Collection
    algorithm, and the associated storage heaps, have changed such
    that CICS is unable to accurately report statistics for the heap
    size and occupancy. Lower than expected heap sizes may be
    reported, together with zero GC activity.
    

Problem conclusion

  • CICS has been changed to report the full heap and GC statistics
    for Java 8 SR 5 and above.
    
    CICS has also been changed to disable the new heap structure by
    specifying -XX:+HeapManagementMXBeanCompatibility. This can be
    overridden in the JVM profile using
    -XX:-HeapManagementMXBeanCompatibility.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI87181

  • Reported component name

    CICS TS Z/OS V5

  • Reported component ID

    5655Y0400

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-09-12

  • Closed date

    2018-02-14

  • Last modified date

    2018-03-01

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

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

    UI53865 UI53866 UI53867 UI53868 UI53869 UI53870 UI53871 UI53872

Modules/Macros

  • DFHSJSC  DFJ@H356 DFJ@H467 DFJ@H468
    

Fix information

  • Fixed component name

    CICS TS Z/OS V5

  • Fixed component ID

    5655Y0400

Applicable component levels

  • R003 PSY UI53872

       UP18/02/15 P F802

  • R00D PSY UI53871

       UP18/02/15 P F802

  • R103 PSY UI53870

       UP18/02/15 P F802

  • R10D PSY UI53869

       UP18/02/15 P F802

  • R803 PSY UI53866

       UP18/02/21 P F802

  • R80D PSY UI53865

       UP18/02/20 P F802

  • R903 PSY UI53868

       UP18/02/24 P F802

  • R90D PSY UI53867

       UP18/02/24 P F802

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
01 March 2018