PM80948: ABEND0C4 RC3B FROM DSNWALCK OFFSET258C

A fix is available

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APAR status

  • Closed as program error.

Error description

  • ABND=0C4-0000003B - LOC=DSNWAAP0.DSNWALCK+258C
    
    If the length of the caller's return area is exactly the same
    as the length of the response area, DSNWALCK will incorrectly
    assume that it don't fit. This will cause the ABEND0C4.
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of DB2 for z/OS 9 and 10.          *
    ****************************************************************
    * PROBLEM DESCRIPTION: 1. An IFI READS request causes ABEND0C4 *
    *                         in CSECT DSNWALCK.                   *
    *                                                              *
    *                      2. An invalid FROM CCSID may be used    *
    *                         when IFCID217 is written.            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    1. If the size of the response area used for an IFI request is
    exactly the size of the return data, an incorrect pointer will
    be used by DB2 IFI code to update IFCA fields.  This will lead
    to an ABEND0C4 in CSECT DSNWALCK.
    
    2. When writing an IFCID217, DB2 may incorrectly determine the
    FROM CCSID to be used to convert the QW0217QA field to UTF.
    Dealing with an invalid CCSID, will cause a significant number
    of CPU cycles to be used by the conversion services.  This can
    lead to an increase of CPU cycles in the conversion services
    code.
    

Problem conclusion

  • 1. Correct the logic error for updating IFCA fields  when
    the response data equals the return area size.
    
    2. Correctly determine the FROM CCSID when writing IFCID217
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM80948

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-01-19

  • Closed date

    2013-05-07

  • Last modified date

    2013-06-04

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

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

    UK94119 UK94120

Modules/Macros

  •    DSNTXSTB DSNWALCK
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UK94119

       UP13/05/25 P F305

  • R910 PSY UK94120

       UP13/05/25 P F305

Fix is available

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Document information


More support for:

DB2 for z/OS

Software version:

A10

Reference #:

PM80948

Modified date:

2013-06-04

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