PM99771: ABENDU0757 SUBCODE04C OF IMS CONTROL REGION DURING QCF UNLOAD JOB RUN

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A QCF job was running to delete messages that were 7 days
  or older in a shared queues environment. At the time the job
  was running there were a large number of messages for one
  particular transaction that arrived. The QCF job was trying to
  read all of these messages prior to deleting the ones in
  criteria. They were fairly large messages, but not unexpected
  (so not a flood).  The IMS Queue buffers eventually filled
  causing EPVT storage to be exhausted and the U0757 SC04C.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: QCF3.1 users with shared queues.Problem      *
  *                 shows when there are a lot of                *
  *                 messages in the queues, and an QCF           *
  *                 UNLOAD is started - to delete aged           *
  *                 messages.                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFS629I IMS CTL TCB ABEND-IMS 0757      *
  *                      error shows after a request for         *
  *                      storage from the private pool -         *
  *                      the storage can not be obtained.        *
  *                      Short on storage is caused by QCF       *
  *                      reading all messages for a single       *
  *                      destination and  keeping them in        *
  *                      buffers till end of destination is      *
  *                      reached                                 *
  ****************************************************************
  * RECOMMENDATION: Do not submit UNLOAD job when the            *
  *                 queues are full. Submit when the             *
  *                 queues are at a low level.                   *
  ****************************************************************
  Programs are changed to determine
  when the Queue Buffers reach a
  certain threshold and send a
  return code instead of continuing
  to unload messages.
  Unload will end with error message
  the short on storage condition will
  be resolved, QCF unload should be
  repeated when the queues are low
  

Problem conclusion

• Install APAR
  

Temporary fix

Comments

APAR Information

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

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

  UI13145

Modules/Macros

• IQCQMR5A IQCQMR5B IQCQMR5C IQCQMR5D IQCQMR58 IQCQMR59
  

Fix information

• Fixed component name

  IMS QUEUE CNTL

• Fixed component ID

  5697E9900

Applicable component levels

• R310 PSY UI13145

     UP13/12/04 P F312

Fix is available

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