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PI76878: ZWAS LE ESTAE EXTENSION BBORLEXT UPDATE TO SUPPRESS DUMPS FOR PGM CHECKS OF TYPE PIC 7 / 0C7 WITH DXC CODE OF X'00' / 0X00

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • An optimization for the JIT Compiler in Java 8 for DAA
    (Data Access Acceleration, to access data in the COBOL Binary
    Coded Decimal (BCD) format) can emit code which makes use of
    hardware instructions designed to handle data in the BCD format.
    If these instructions encounter data that is not in BCD format
    the instruction will generate a Data Exception, interrupt code
    is 0c7 with a DXC code of x'00' / 0x00.
    DXC code 00 -> Decimal-operand data exception
    In a WebSphere environment on z/OS this causes the WebSphere
    provided LE Extension Routine BBORLEXT to take a SVC Dump.
    Dump title is:
    DUMP TITLE=COMPON=WEBSPHERE Z/OS,  COMPID=5655I3500,
    ISSUER=BBORLEXT,ABEND IN (MODULE NAME NOT KNOWN)
    Dump analysis would show the pgm check in JIT Compiled code
    (Use jdmpview command "info jitm" to dump the addresses in
    memory for the compiled code).
    The method involved will either be, or will have inlined, method
    com/ibm/dataaccess/DecimalData.convertPackedDecimalToLong
    The failing instruction will most likely be a EX pointing to
    a ZAP. Please open a PMR for help with analysis is you are
    not sure if this APAR applies to your specific case.
    This APAR is taken to suppress the dump for this case.
    Expected operation is that control returns to the JVM signal
    handler, operation continues and an IllegalArgumentException
    is thrown.
    

Local fix

  • Switch -Xjit:disableIntrinsics causes the JIT to not emit
    the instructions used for DAA.
    
    
    After setting -Xjit:disableIntrinsics you should
    clear the Shared Class Cache with clearClassCache.sh for the
    server involved, otherwise an AOT compiled version of the DAA
    code with the DAA instructions might still be used.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V8.5 and V9.0 for z/OS               *
    ****************************************************************
    * PROBLEM DESCRIPTION: A dump of a abend 0c7 reason code       *
    *                      00000000 is encountered when running    *
    *                      WebSphere Application Server for z/OS.  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Dump of a ABEND0C7/ABENDS0C7 reason code 00000000 is taken by
    bborlext because application data was encountered that is not
    in BCD format. bborlext should not take a dump because in Java
    8 the JIT generates instructions like ZeroAndAdd that will
    abend when bad data is encountered. The abend tells them there
    was bad data and their signal handler gets control to go back
    to the program with an appropriate exception.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PI76878

  • Reported component name

    WEBSPHERE FOR Z

  • Reported component ID

    5655I3500

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-02-20

  • Closed date

    2017-04-26

  • Last modified date

    2017-05-02

  • 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

    WEBSPHERE FOR Z

  • Fixed component ID

    5655I3500

Applicable component levels

  • R850 PSY

       UP

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850"}]

Document Information

Modified date:
06 September 2021