IBM Support

IV74043: INCREASE IN THE NUMBER OF SYSTEM.GC() CALLS AFTER APPLYING IV687 43

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APAR status

  • Closed as program error.

Error description

  • Error Message: An application that uses the
    -XX:maxDirectMemorySize to configure the maximum size of memory
    allocated for direct byte buffers, may see an increase in the
    number of System.gc() calls after applying IV68743.
    .
    Stack Trace: The System.gc() calls are triggered by this stack:
    java/lang/System.gc()
    java/nio/Bits.reserveMemory()
    java/nio/DirectByteBuffer.<init>()
    java/nio/ByteBuffer.allocateDirect()
    .
    

Local fix

Problem summary

  • This problem occurs after applying IV68743.
    

Problem conclusion

  • The direct memory management code has been updated to correct
    the problem.
    .
    This APAR will be fixed in the following Java Releases:
       8    SR1 FP10  (8.0.1.10)
       7 R1 SR3 FP10  (7.1.3.10)
       6 R1 SR8 FP7   (6.1.8.7)
       6    SR16 FP7  (6.0.16.7)
       7    SR9 FP 10 (7.0.9.10)
    .
    Contact your IBM Product's Service Team for these Service
    Refreshes and Fix Packs.
    For those running stand-alone, information about the available
    Service Refreshes and Fix Packs can be found at:
               https://www.ibm.com/developerworks/java/jdk/
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV74043

  • Reported component name

    JAVA CLASS LIBS

  • Reported component ID

    620700130

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-06-09

  • Closed date

    2015-07-31

  • Last modified date

    2015-07-31

  • 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

    JAVA CLASS LIBS

  • Fixed component ID

    620700130

Applicable component levels

  • R800 PSY

       UP

  • R700 PSY

       UP

  • R600 PSY

       UP



Document information

More support for: Runtimes for Java Technology
Java Class Libraries

Software version: 800

Reference #: IV74043

Modified date: 31 July 2015