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PM86010: DFHWB0001 ABENDS0C4 X'3A98' IN DFHWBSV

A fix is available

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APAR status

  • Closed as program error.

Error description

  • You receive DFHWB0001 An abend (code 0C4/AKEA) has occurred at
    offset x'3A98' in module DFHWBSV.   You have APAR PM74806 on
    PTF UK90242 installed.    The ABEND0c4 occurs in DFHWBSV
    +x'3A94' on a STORE instruction because register 9 is 00000000.
    
    The trace shows CISR fails with:
     WB 0D02 WBSV  *EXC* - RECOVERY_ENTERED
    FUNCTION(WRITE_RESPONSE)
    SESSION_TOKEN(00000000 , 00000000) BODY(00000000 , 00000000)
    STATUS_CODE(C8) HEADER_NAME_LIST(0F240628 , 00000005)
    HEADER_VALUE_LIST(0EE138A0 , 00000005) MEDIATYPE
    (application/nnn.nnn.cics.isc)
    
    The problem occurs when CICS is responding to a pong message to
    a remote system.  CICS will reuse the buffer that the PING
    message came in, change the command type to PONG, and then call
    DFHWBSV to send it back.   There can be a timing issue if CIST
    runs and clears the wbs_session_token.  CISR abends with an
    abend0c4 due to the session token containing zeros.
    
    Additional Symptom(s) Search Keyword(s):
    KIXREV
    
    
    
    
    
    
    
    
    
    
    
    
    Additional Symptom(s) Search Keyword(s): KIXREVRJL
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All CICS users.                              *
    ****************************************************************
    * PROBLEM DESCRIPTION: CICS ABEND with message DFHWB0001 S0C4  *
    *                      at offset x'3A98' in DFHWBSV when it    *
    *                      responses a pong message over IPIC to   *
    *                      remote region.                          *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    A CICS 4.2 region is connected with a CICS 5.1 region over IPIC,
    CICS 5.1 region sends the ping message over IPIC every 60
    seconds. The IPCONN is released just after a ping message comes
    into CICS 4.2 region through one of the isss_wb_session,and
    isss_wb_session is set to 0 before CICS processes the ping
    message. CICS uses the same isss_wb_session to send pong
    message to remote CICS partner. Then,
    CICS reports DFHWB0001 and CISR ABEND with S0C4 because
    isss_wb_session contains invalid session token.
    Additional keywords: msgDFHWB0001,WB0001.
    

Problem conclusion

  • CICS has been changed to make sure isss_wb_session is valid
    before CICS sends pong message.
    

Temporary fix

  • FIX AVAILABLE BY PTF ONLY
    

Comments

APAR Information

  • APAR number

    PM86010

  • Reported component name

    CICS TS Z/OS V4

  • Reported component ID

    5655S9700

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-04-01

  • Closed date

    2013-07-12

  • Last modified date

    2013-08-02

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

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

    PM86723 UK95774

Modules/Macros

  •    DFHISRR
    

Fix information

  • Fixed component name

    CICS TS Z/OS V4

  • Fixed component ID

    5655S9700

Applicable component levels

  • R700 PSY UK95774

       UP13/07/18 P F307

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:
02 August 2013