PI61207: DFHAP0002 A SEVERE ERROR (CODE X'095D') HAS OCCURRED IN DFHAPCE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A CONNECTION request was received causing a CISS task to be
  started. The customer is using IPCONN autoinstall.
  The CISS task successfully autoinstall the IPCONN and the
  4 SOCKETs used were successfully one. The CISS task then
  went into an IS_RECV wait to await the RESYNC flow.
  During that period, one of the SOCKET was closed
  (Probably by the other region).
  This caused the ISSS to be queued to the CISE task
  for SESSION_ERROR processing. The IPCONN now need to
  be closed (RELEASED). The CISS task system ISSB that
  is used is set with the ABEND flag and the IS_RECV ECB
  is posted. CISE then does an ATTACH for CIST to close
  down the IPCONN. Now the CISS and CIST tasks are competing
  to terminate the IPCON.
  The CIST task managed to close 3 SOCKETS and the CISS
  task close 1. Because the IPCONN is autoinstall, the CIST
  task get an EXCLUSIVE LOCK for ISCBCHN and preventing the
  CISS task to run. During that time all the SO, WB and IS
  control blocks to that IPCONN are freemain and removed
  from the directory. The LOCK is released. The CISS task
  get going and expect the ISCB to be found. Because it
  is not found this result in the DFHAP0002 abend.
  This error only happen when IPCONN AUTOINSTALL is used.
  If the customer would like a temporary solution it will
  be to use hard code IPCONN. This will also save processing
  time as the IPCONN will only get install once instead of
  being install on every CONNECTION request received and
  being deleted everytime the IPCONN is deleted.
  

Local fix

• Use hard code IPCONN and not IPCONN Autoinstall.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All CICS users.                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * DFHAP0002 A SEVERE ERROR (CODE X'095D')                      *
  * HAS OCCURRED IN DFHAPCE.                                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * .                                                            *
  ****************************************************************
  An IPIC CONNECTION request is received causing the CISS task to
  be started. This IPCONN is designed to apply autoinstall. Task
  CISS is suspended to wait for a RESYNC flow, after the IPCONN
  is autoinstalled. In this time slot, a session error happens,
  CISE is resumed and the related ISSS is queued to CISE for
  session error handling. CISE then attached CIST to close the
  IPCONN. Task CISS gets resumed and it also starts to close the
  IPCONN. Therefore, the CISS and CIST are running at the same
  time to terminate the IPCONN. The IPCONN sessions are closed
  by CISS and CIST accordingly. Because the IPCONN is
  autoinstalled, CIST gets an exclusive lock (which blocks the
  task CISS) and then frees all the ISSB, ISSS and ISCB control
  blocks of this IPCONN. After the freemain operation, the lock
  is released. Task CISS continues to run. It tries to inquire
  the IPCONN, but gets an exception as the ISCB has been deleted
  by CIST. This causes a DFHAP0002 message with a system dump.
  

Problem conclusion

• DFHISEM has been changed to make sure CIST will not be attached
  if a session error happens and CISS is running.
  

Temporary fix

Comments

APAR Information

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

  PI56923

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

  UI38169

Modules/Macros

• DFHISEM
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R000 PSY UI38169

     UP16/07/04 P F606

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.