PI50088: TASKS THAT ARE MARKED PURGEABLE IN DISPATCHER ARE NOT BEING TIMED OUT BY DTIMOUT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A TASK is marked PURGEABLE in Dispatcher but does not get timed
  out by DTIMOUT.  Going to Register 1 in the Register Save Area
  the TASK is waiting on an ECB and at that address it's all
  ZEROs.  So the ECB has been corrupted by another TASK.  This
  means that this task cannot be purged, and cannot be timed out
  by the CICS DTIMOUT mechanism.  All attempts to purge this task
  will return EXCEPTION/INVALID_STATE.
  Additional Symptom(s) Search Keyword(s): KIXREVEPH
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: A corrupted ECB can lead to all         *
  *                      tasks that are waiting to be            *
  *                      purged by DTIMOUT to wait forever.      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A task is waiting on an ECB. While waiting the ECB is corrupted.
  CICS processing will eventually try to purge the task due to
  DTIMOUT. This purge will fail as the ECB is corrupted and a
  reason code of INVALID_STATE is returned. When DTIMOUT
  processing occurs for a second time it will select the same task
  to purge, which will again fail due to the corrupted ECB. All
  other tasks that are purgeable and have passed by their timeout
  due value will never be selected to be purged by the DTIMOUT
  process.
  

Problem conclusion

• DFHDSDS3 has been altered to check for the INVALID_STATE reason
  from a DTIMOUT purge request and ensure that the task will not
  be selected for a second time when DTIMOUT processing occurs
  again. This allows the DTIMOUT mechanism to continue to function
  for other tasks in CICS.
  

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:

  PI54378 UI34673 UI34674

Modules/Macros

• DFHDSDS3
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R800 PSY UI34673

     UP16/01/28 P F601

• R900 PSY UI34674

     UP16/01/28 P F601

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.