PI23838: ABEND SB78 WHEN AN AWE IS BEING RELEASED BY DFSAOSW0.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An abendSB78 occurs while attempting an OS Release Storage call
  for an AWE. The code requesting the Release is in DFSAOSW0.
  The AWE was obtained by module DFS6ECT0. The call by DFS6ECT0
  was a BCB call to get the AWE block so it should be returned
  to the AWE pool in IMS.
   The problem is that the AWE storage provided was only cleared
  for x'B' bytes and the flag that indicates if the storage was
  provided by on OS OBTAIN Storage call is at offset x'10'. There
  was residual data there and the bit was on from the prior use
  of the AWE.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS V12 users of AOS=X/B with            *
  *                 APPC/IMS timeout active.                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABEND SB78 occurs because IMS           *
  *                      releases the wrong type of storage.     *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  For AOS=X/B, when a front-end IMS sends an ACK to the
  back-end IMS, the front-end will put a reminder in a
  special queue.  This will be used just in case the back-end
  abends and the front-end needs to send a abend message to
  the client.  If APPC/IMS timeout is active and the APPC
  conversation times out, IMS will check if there is anything
  on that special queue and if it is, queue an AWE to remove
  it from the queue.  The AWE was not completely cleared and
  therefore some residual data has been used and the wrong
  service for freeing the AWE has been used.
  

Problem conclusion

• GEN:
  KEYWORDS:
  
  *** END IMS KEYWORDS ***
  Modul DFS6ECT0 has been modified to clear the entire AWE
  before queuing it to DFSAOSW0.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  PI27369 UI23097

Modules/Macros

•    DFS6ECT0
  

Fix information

• Fixed component name

  IMS V12

• Fixed component ID

  5635A0300

Applicable component levels

• R200 PSY UI23097

     UP14/11/18 P F411 Ž

Fix is available

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