PI12515: ABEND0C4 IN HWSOMXGR DURING SHUTDOWN OF SCI AND IMS CONNECT.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Abend 0C4 in HWSOMXGR the notify processor in IMS Connect.
  Here is the sequence of events leading to this abend:
   1. Icon, SCI and ODBM are all being shutdown at the same time
   2. SCI 'begins' shutdown by denying input from applications
      (ICON,IMS)
   3. ICON sends a deregister request to SCI during shutdown
   4. SCI returns a non zero return code to deregister request.
   5. ICON frees the CSTOKEN and continues
   6  SCI drives notification to inform ICON that SCI is
      going away but the CSTOKEN used by the notify exit
      has already been freed. The result is the abend.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS V12 IMS Connect user's with          *
  *                 IMSPLEX support.                             *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABEND0C4 in HWSOMXGR during shutdown    *
  *                      of IMS Connect and SCI.                 *
  *                                                              *
  *                      ABEND0C1 in HWSOREG0 during shutdown    *
  *                      of IMS Connect and SCI.                 *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  Two symptoms resulting in abends as a consequence of both IMS
  Connect and SCI terminating at the same time.
  
  ABEND0C4 in HWSOMXGR:
  Here is the sequence of events leading to this abend:
   1. Icon, SCI and ODBM are all being shutdown at the same time
   2. SCI 'begins' shutdown by denying input from applications
      (ICON,IMS)
   3. ICON sends a deregister request to SCI during shutdown
   4. SCI returns a non zero return code to deregister request.
   5. ICON frees the CSTOKEN and continues
   6  SCI drives notification to inform ICON that SCI is
      going away but the CSTOKEN used by the notify exit
      has already been freed. The result is the abend.
  
  ABEND0C1 in HWSOREG0:
   1. Icon and SCI are all being shutdown at the same time.
   2. SCI drives the IMS Connect notification exit HWSOMXGR to
      inform of the SCI disconnection.
   3. IMS Connect notification exit HWSOMXGR enqueues an AWE
      to clean up it's SCI resources in action to the SCI
      disconnect.
   4. Prior to the processing of the AWE enqueued as a result of
      the SCI disconnect notification the IMS connect termination
      process invoked by the CLOSEHWS shutdown is not aware that
      SCI has disconnected attempts to deregister from OM.
   5. OM deregistration tries to access the already released SCI
      parm list resulting in an abends0c1 in HWSOREG0.
  
  Keywords: ABENDS0C4 S0C4 0C4 ABEND0C1 S0C1 0C1 CMDCLO CLOSEHWS
  

Problem conclusion

• GEN:
  KEYWORDS:
  
  *** END IMS KEYWORDS ***
  
  -To correct the ABEND0C4 in HWSOMXGR:
  Part HWSOMXTT has been modified.
  The CSTOKEN area required for the SCI notification exit HWSOMXGR
  will not be released if the response to the LEAVE (from SCI)
  request is non-zero.  This change ensures that the storage is
  available when SCI drives the exit during termination.
  
  -To correct the ABEND0C1 in HWSOREG0:
  Part HWSOMXTT has been modified to skip the SCI deregistration
  if the IMSplex is already disconnected from IMS Connect.
  
  Parts HWSOMXRC and HWSOMXDC have been modified to preserve the
  disconnect status of the IMSplex during IMS Connect termination
  which prevents the unecessary attempt to deregister the IMSplex.
  

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:

  PI16675 PI16676 UI20207

Modules/Macros

•    HWSOMXDC HWSOMXGR HWSOMXRC HWSOMXTT
  

Fix information

• Fixed component name

  IMS V12

• Fixed component ID

  5635A0300

Applicable component levels

• R200 PSY UI20207

     UP14/08/05 P F408 Ž

Fix is available

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