OA45843: IVT5504I ABEND 0C4 OCCURRED IN IVTSMCSD 14/09/11 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• IVTSMCSD is scheduled because CSM storage is constrained.
  In the process of cycling through the CSM storage pools,
  an abend0c4 occurs when IVTSMCSD references already freed
  storage.
  Additional symptom:
  SRB loop of IVTSMCSD. SRB of IVTSMCSD points to itself.
  Possible double SRB condition can occur
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * ABEND0C4 in IVTSMCSD.                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply the PTF when it is available.                          *
  ****************************************************************
  This problem may be described as follows:
    1. CSM fixed storage was at constrained level.
    2. An application program issued a CSM PAGE_BUFFER
       request with type=page_eligible.
  
    3. IVTSMCBF received control to process the request.
       It found the CSM fixed storage was at the constrained
       level. It incorrectly checked to see if the side process
       routine IVTSMCSD was running. It scheduled the IVTSMCSD
       in error to page free the CSM fixed storage.
    4. This caused two processes of IVTSMCSD to be running at the
       same time and one of the processes received an ABEND0C4 in
  
       IVTSMCSD.
  

Problem conclusion

• IVTSMCBF has been changed to schedule the side process
  routine IVTSMCSD only if it was not already running.
  IVTSMCSD and IVTSMCFB have been included only for
  maintenance purposes.
  

Temporary fix

Comments

APAR Information

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

  OA45827

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

  UA74752

Modules/Macros

• IVTSMCBF IVTSMCSD IVTSMCFB
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R210 PSY UA74752

     UP14/09/19 P F409 «

Fix is available

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