PI41839: RANDOM ABENDS (S0C4, S0C6) PROCESSING IMS V13 LOG WITH RECORDS CONTAINING COMPRESSED DATA

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Random abends (S0C4, S0C6) processing IMS V13 log with records
  containing compressed data.  The IMS x'9904' record may be trun-
  cated at any point and a continuation record created. If the
  truncation occurs in a block of compressed data, which is then
  passed to the Data Compression and Expansion routine to be
  expanded with the original non-truncated length specified, the
  expansion fails but during the process unrelated storage may be
  overlaid at random causing subsequent abends to occur.
  In once case an ABEND0C4 occured in ALZ501 at offset x'559A'.
                                      ABENDS0C4 ABENDS0C6 ABEND0C6
  Note: For IMS PI V240 see APAR PI40569 as this is FF there.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of IMS Problem Investigator V2.3       *
  ****************************************************************
  * PROBLEM DESCRIPTION: Random abends (eg S0C4, S0C6)           *
  *                      processing IMS V13 log with records     *
  *                      containing compressed data.             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Random abends (eg S0C4, S0C6) processing IMS V13 log with
  records containing compressed data.
  

Problem conclusion

• The IMS x'9904' record may be truncated at any point and a
  continuation record created. If the truncation occurs in a
  block of compressed data, which is then passed to the Data
  Compression and Expansion routine to be expanded with the
  original non-truncated length specified, the expansion fails
  but during the process unrelated storage may be overlaid at
  at random causing subsequent abends to occur. In processing
  for the IMS x'9904' record, before calling the Data
  Compression routine to expand compressed data the supplied
  length must be validated against the actual data length
  to ensure truncation has not occurred.
  

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:

  UI28349

Modules/Macros

• ALZBATCH ALZBRAPI ALZBRFMT ALZBRMIO ALZBRPRE
  ALZLCAT  ALZLFMER ALZLRFIL ALZ99A   ALZ99B   ALZ99C   ALZ99D
  ALZ999
  

Fix information

• Fixed component name

  IMS PROBLEM INV

• Fixed component ID

  5655K5000

Applicable component levels

• R230 PSY UI28349

     UP15/06/11 P F506

Fix is available

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