PI15977: ABEND0C4 IPIGGET OR LOOP IPI4QMGR PROCESSING PSEUDO PROGRAM-SWITCH TRANSACTIONS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ABENDS0C4 in IPIGGET or loop IPIGGET and IPI4QMGR.
  In processing transactions in a program-switch chain, when IMS
  PA determines that the chain count in the input message
  (MSGPREFI) has wrapped from 65535 to 0 it flushes the existing
  transaction records to the report processors and re-establishes
  the head of the chain at the Zero input message. In the case
  where a transaction meeting the criteria is not a
  program-switch, attempting to flush the expected resulting chain
  of transactions may produce variable results in subsequent
  transactions from the same source, including an S0C4 (where
  transaction storage has been freed) and a program looping
  (where transaction chain pointers have become corrupted).
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of IMS Performance Analyzer V4.3       *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend SoC4/Loop processing pseudo       *
  *                      program-switch transactions             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  ABENDS0C4 in IPIGGET or loop IPIGGET and IPI4QMGR.
  In processing transactions in a program-switch chain, when IMS
  PA determines that the chain count in the input message
  (MSGPREFI) has wrapped from 65535 to 0 it flushes the existing
  transaction records to the report processors and re-establishes
  the head of the chain at the Zero input message. In the case
  where a transaction meeting the criteria is not a
  program-switch, attempting to flush the expected resulting chain
  of transactions may produce variable results in subsequent
  transactions from the same source, including an S0C4 (where
  transaction storage has been freed) and program loop
  (where transaction chain pointers have become corrupted).
  

Problem conclusion

• Do not flush program-switch chains that have been assumed to
  have wrapped, rather let HWM processing deal with excessive
  queues.
  

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:

Modules/Macros

• IPIIPROC IPISAPAR IPI4PROC
  

Fix information

• Fixed component name

  IMS PERF ANALYZ

• Fixed component ID

  5655E1500

Applicable component levels

• R430 PSY UI17339

     UP14/04/30 P F404

Fix is available

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