PM94059: CPSM CICSPLEX OR CMAS BROADCAST LEG COUNT DECREMENTED INCORRECTLY

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• If a multi-leg broadcast gets timed out, but one of the legs is
  in an XMIT state (it is a multi-buffer send, and we have sent
  at least the first buffer, but not the last,) method CSLT may
  process this leg multiple times, invalidly decrementing the leg
  count to the point where it is 0. At this point method CTRC
  gets called and may pre-maturely clean up the entire broadcast.
  Additional Symptom(s) Search Keyword(s): KIXREVSVR
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICSPlex SM V4R2M0 Users                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: When a CMAS times out one leg of a      *
  *                      multi-leg broadcast, errors can occur   *
  *                      that result in control blocks in use    *
  *                      for the broadcast to be prematurely     *
  *                      made available for other communications *
  *                      requests.  This can cause invalid       *
  *                      failures for those requests, and the    *
  *                      orphaning of the control blocks,        *
  *                      leading to the CMAS issuing the         *
  *                      following error message:                *
  *                                                              *
  *                        EYUCT0105E Transport Services         *
  *                                   control block shortage     *
  *                                   has occurred.              *
  ****************************************************************
  * RECOMMENDATION: After applying the PTF that resolves this    *
  *                 APAR, all CMASes must be restarted.  Note    *
  *                 that the restarts do not need to occur at    *
  *                 the same time.                               *
  ****************************************************************
  When one leg of a multi-leg broadcast is timed out while in XMIT
  state (it is a multi-buffer broadcast, and at least the first
  buffer has been sent for the leg, but not the last buffer),
  logic errors in methods EYU0CSLT (CSLT) and EYU0CTRC (CTRC) can
  cause the control blocks in use by the broadcast being released
  while still in use.  If this occurs, it is possible that
  multiple communications requests can be using the same control
  blocks concurrently.  This will lead to the failure of those
  requests, and the orphaning of the control blocks
  

Problem conclusion

• CSLT and CTRC have been updated to properly handle the time out
  of one leg of a multi-leg broadcast, which is in XMIT state.
  

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:

  PM94840 UK96688

Modules/Macros

•    EYU0CSLT EYU0CTRC
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R70M PSY UK96688

     UP13/08/16 P F308

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.