PK08494: MIGRATING TO CICS TS 3.1 SHORT ON STORAGE DFHSM0131 DURING INITIALIZATION KESTK24E SUBPOOL DFHAPIQ

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Migrating from CICS 2.3 to CICS 3.1, running the same workload,
  you now experience Short On Storage below the line.
  DFHSM0131  CICS is under stress (short on storage below
  DFHSM0132  CICS is no longer short on storage below 16MB
  Dumps at the time of the SOS appear to show more storage being
  used in subpool KESTK24E.  This apar is being taken to
  investigate this further.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHSM0131 CICS is under stress (short   *
  *                      on storage below 16MB).                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  CICS is short on storage (SOS) below 16MB and MSGDFHSM0131 is
  issued because the KESTK24E kernel stack extension subpool is
  unexpectedly occupying a large percentage of the CDSA.
  This subpool storage is needed for DFHAPIQX INQ_APPLICATION_DATA
  calls which are being made from a GLUE.
  
  In the definition of DFHAPIQ, SMODE is not specified so it
  defaults to SMODE(24) causing stack storage to be obtained from
  below the 16MB line.  As there are many concurrent tasks
  making the DFHAPIQX INQ_APPLICATION_DATA call this can lead to
  below the line DSA storage being exhausted.
  
  Additional keywords: SM0131 MSGDFHSM0132 DFHSM0132 SM0132
                       Global User Exit
  

Problem conclusion

• DFHAPIQ has been changed to add SMODE(31) to its definition.
  This will cause stack storage to be obtained from above the 16MB
  line.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

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

  UK07581

Modules/Macros

•    DESAPIQ  DFHAPIQ
  

Fix information

• Fixed component name

  CICSTS 3.1 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R400 PSY UK07581

     UP05/09/28 P F509

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.