PH12633: ABEND878 in IMS due to slow storage creep after APAR PH04092

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ABENDS878 in IMS due to storage growth when running with APAR
  PH04092.
  The IMS control region private storage slowly grows over time.
  With APAR PH04092, ETOS is doing a GETMAIN for x'190' bytes, but
  is only freeing x'186', therefore causing the slow storage creep
  (or leak). This leaves small pieces of allocated pages that
  don't get freed and eventually causes IMS to ABEND with S878.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IBM IMS Extended Terminal Option Support *
  *                 for z/OS Version 3 Release 2 (FMID=H1J4320)  *
  *                 users.                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: After APAR PI64585 / PTF UI48269 (for   *
  *                      IMS V13) or APAR PH04092 / PTF UI60354  *
  *                      (for IMS V14 and V15) of IMS ETO        *
  *                      support is applied, IMS control region  *
  *                      may abend with system completion code   *
  *                      878 due to a memory leak.               *
  *                                                              *
  *                      This occurs when both of the following  *
  *                      conditions are satisfied:               *
  *                                                              *
  *                      - "IMS" is selected as the DFS3650      *
  *                      option in an IMS ETO support.           *
  *                      - RACFMSG=Y is specified in the         *
  *                      DFSDCxxx PROCLIB member to activate the *
  *                      Greeting Messages exit routine          *
  *                      (DFSGMSG0).                             *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  When the above conditions are met, the DFSGMSG0 exit, provided
  by IMS ETO Support, is called every time signon is requested.
  For each call, the exit obtains and releases short storage to
  edit RACF singon message. The address and length for the storage
  release is incorrect and that causes a memory leak and
  fragmentation. Repeated call to the exit routine leads storage
  shortage in IMS control region.
  

Problem conclusion

• The address and length has been corrected when releasing the
  area.
  

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:

  UI63716

Modules/Macros

• IZTGMSGD IZTGMSGE IZTGMSGF
  

Fix information

• Fixed component name

  IMS ETO SUPPORT

• Fixed component ID

  5655E1200

Applicable component levels

• R320 PSY UI63716

     UP19/06/21 P F906 ­

Fix is available

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