PI71401: ALZBATCH LOOP AFTER AN END-OF-VIRTUAL-MEMORY EVENT IS DETECTED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ALZBATCH batch goes into a loop after an end-of-virtual-memory
  event is detected, where it should report the event and end with
  RC=0008.
  This tight loop shows activity in routines:
  ALZBRSTM around x'cc'
  ALZXPORT around x'bc0'
  ALZ4QMGR around x'386'
  
  As part of this fix, we'll need to limit filter processing
  resource usage for message continuation records.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of IMS Problem Investigator            *
  ****************************************************************
  * PROBLEM DESCRIPTION: ALZBATCH - Reduce virtual-memory use    *
  *                      when using filtering and resolve an     *
  *                      end-of-VM handling issue.               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  1. After install of PI68447 the virtual memory requirement for
     ALZBATCH FILTER processing has increased and can be limiting
     when processing very large IMS log input files.
  
  2. ALZBATCH can enter a loop after an end-of-virtual-memory even
     is detected, where it should report the event and end RC=0008
  

Problem conclusion

• 1. To satisfy requirements of "RFE #90560 - Extract of Message
     Continuation" changes were made in batch filter processing
     that can result in a significant increase in the virtual
     storage requirement of ALZBATCH when very large IMS log input
     files are processed. The design of the enhancement provided i
     PI68447 has been modified in order to cap the resource overhe
     introduced by this enhancement.
  
  2. In many instances ALZBATCH is able to detect an
     the condition and end RC=0008. However, it currently enters a
     CPU-intensive loop. The process has been modified to ensure t
     the batch job ends cleanly after reporting the condition.
  

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:

  UI42632

Modules/Macros

• ALZA03E9 ALZBATCH ALZCA20A ALZCDOLI ALZLRFIL
  ALZ27A   ALZ27B   ALZ27C   ALZ27D   ALZ27E   ALZ4QMGR
  

Fix information

• Fixed component name

  IMS PROBLEM INV

• Fixed component ID

  5655K5000

Applicable component levels

• R240 PSY UI42632

     UP16/11/24 P F611

Fix is available

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