PM82384: DFS1058E AND ABENDU0845 RC30: RPLI ALREADY ACTIVE

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APAR status

  • Closed as program error.

Error description

  • U0845 RC30 is issued when DFSDVSM0 is entered to process a GU
    call because the RPL is still active (RPLACTIV=FF).
    The U0845 RC30 error seems to be a VSAM flavor of the OSAM
    buffer hang following a termination of a stored procedures
    thread in the same region. The OSAM hang was fixed by OSAM
    APAR PM64610.
    Initial analysis of the VSAM case indicates the following:
    - An ODBA thread GU call was processing using a VSAM HDAM DB
    - The ODBA thread was cancelled while in this VSAM call
    - RPLACTIV=FF (RPL ACTIVE), PSTBHVSU (VSAM ACCESSED) left ON
    - PSTLRHLD (VSAM LRECL OWNED) was not ON because VSAM buffer
      not yet obtained. PSTBHACT(VSAM ACTIVE) was also ON
    Flags RPLACTIV, PSTBHVSU and PSTBHACT are set for the ODBA
    thread while processing the GU call. DFSFXC50 is called for
    dependent region termination and checks for flag PSTBHVSU in
    routine RELPSBPC. Since PSTBHVSU was ON, routine VBHRRELS in
    DFSDVBH0 was called to release any held VSAM buffer. However,
    PSTLRHLD was not ON because the GU call processing had not
    yet progressed to the point of acquiring a VSAM buffer.
    With PSTLRHLD OFF, logic in routine VBHR2000 wrote a DL/I
    trace record for the buffer release call (PSTFNCTN=DD) and
    returned to caller, leaving RPLACTIV=FF (RPL STILL ACTIVE).
    .
    The ODBA thread was restarted in the same region to process
    another GU call, using the same RPL addressed by PSTRPLI.
    RPLACTIV was still set to x'FF' (RPL ACTIVE) from the
    previously terminated ODBA thread GU call.  When DFSDVSM0
    was entered to process this GU call, RPLACTIV was found to
    contain a x'FF' value and ABENDU0845 RC30 was issued.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: IMS V11 users with VSAM databases may be     *
    *                 affected.                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: User received AbendU0845 and message    *
    *                      DFS1058E - REASON = 30 - RPLI ACTIVE ON *
    *                      ENTRY to DFSDVSM0.                      *
    *                      This occurred after an ODBA thread      *
    *                      was terminated and then restarted.      *
    ****************************************************************
    * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
    ****************************************************************
    AbendU0845 reason code 30 is issued by IMS module DFSDVSM0 when
    the RPLACTIV flag contains xFF at the beginning of a VSAM
    request.  This is an error condition because xFF indicates
    VSAM RPL (Request Parameter List) is currently being used for
    another VSAM request.
    
    When an ODBA thread or a dependent region abnormally terminates
    in the middle of DL/I processing, module DFSFXC50 does some
    cleanup including zero'ing out the RPLDACB field.  But it does
    not terminate the VSAM request that was in progress.
    When DL/I processing resumes, RPLACTIV is still on (i.e. xFF),
    and causes abendU0845 and MSGDFS1058E reason code 30 to be
    issued.
    

Problem conclusion

  • GEN:
    KEYWORDS:
    
    *** END IMS KEYWORDS ***
    Module DFSFXC50 has been changed to resolve the problem.
    An ENDREQ macro has been added to the cleanup logic to terminate
    a VSAM request if RPLACTIV is xFF and RPLDACB is non-zero.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM82384

  • Reported component name

    IMS V11

  • Reported component ID

    5635A0200

  • Reported release

    100

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-02-08

  • Closed date

    2014-01-31

  • Last modified date

    2014-03-03

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

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

    PM97725 PI07824 UI14737

Modules/Macros

  • DFSFXC50
    

Fix information

  • Fixed component name

    IMS V11

  • Fixed component ID

    5635A0200

Applicable component levels

  • R100 PSY UI14737

       UP14/02/05 P F402

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


More support for:

IMS

Software version:

100

Reference #:

PM82384

Modified date:

2014-03-03

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