PK51671: DFSRMD00 ABENDS0C4 ON XRF ALTERNATE 07/08/24 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• XRF Alternate fails with 0C4 in DFSRMD00 just after an XRF TKO
  completed .
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: IMS V10 XRF and Fast Path users with         *
  *                 an RM resource structure (STM=YES),          *
  *                 Shared EMHB, and apar PK45900 applied.       *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABENDS0C4 in DFSRMD00 during XRF        *
  *                      takeover.                               *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  A FINANCE terminal with OPTION=OPTACK defined entered a
  Fast Path transaction using Shared EMH.  The output was
  received, but not dequeued until the next input because
  of the OPTACK definition.  This leaves the output message
  locked in CQS.
  
  An XRF takeover was then initiated.
  
  During XRF takeover processing, the XRF alternate performed
  message resyncronization for the locked message.
  Additionally, DFSCRSP0 attempted to cleanup the EMHB and
  UOWE associated with the terminal.  Because of a coding
  error, the UOWE storage was released, but the EMHB still
  pointed to the UOWE.
  
  Because the terminal was class 2, takeover processing
  initiated a SIMLOGON for the terminal.  Eventually, the
  terminal attempted to input a new fast path transaction.
  This caused DFSRMD00 to be invoked, attempting to update
  status in RM for the terminal.  The abend occurred when
  attempting to access the freed UOWE from the EMHB.
  
  
  Additional keywords:
  
  ABEND0C4 0C4 S0C4
  

Problem conclusion

• AIDS: RIDS/DCS RIDS/CNTRL DCS CNTRL
    GEN:
  
  *** END IMS KEYWORDS ***
  DFSCRSP0 is modified to correctly reference the EMHB and
  UOWE, which will cause the blocks to be correctly processed.
  
  DFSRMD00 is modified to use unique EMHB trace codes when
  obtaining a EMHB for better diagnostics, and to avoid
  clearing the entire EMHB (which clobbers the EMHB trace)
  when creating a new EMHB.
  
  DBFEMHB is modified to define new EMHB trace code x'80' for
  DFSRMD00 to use when using an existing EMHB.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UK29003 UK29004

Modules/Macros

• DBFEMHB  DFSCRSP0 DFSRMD00
  

Fix information

• Fixed component name

  IMS V10

• Fixed component ID

  5635A0100

Applicable component levels

• R010 PSY UK29003

     UP07/09/11 P F709 «

• R012 PSY UK29004

     UP07/09/11 P F709 «

Fix is available

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