PI91601: UNNECESSARY DFHSO1000 DUMP TAKEN FOR TIMED OUT SOCKET CONNECT REQUEST

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The new DFHSYDMP program  in, CICS TS 5.4,  sets up a system
  dump code for message DFHSO1000.  This, in turn, causes a
  system dump to be taken even in the case where a CONNECT_SOCK
  fails due to timeout.  This can cause multiple unnecessary
  dumps.  This APAR is being taken to explore changing DFHSOS12,
  to only issue an exception trace entry for an AioRc of 1127
  (x'467') meaning ETIMEDOUT and to not call DFHMEME to issue
  message DFHSO1000.
  
  SO 0E03 SOUS  *EXC* - ASYNCIO_REQUESTED_FUNCTION_ERROR
  RETURN_VALUE(-1) RETURN_CODE(1127) REASON_CODE(769E0291)
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: An SO1000 system dump is taken for      *
  *                      message DFHSO1000 when an IPCONN        *
  *                      has a HOST IP address that is valid     *
  *                      but not in use.                         *
  ****************************************************************
  The PLTPI SIT parameter had a value other than NO so
  CICS initialization invoked PLT programs, including the
  user-replaceable module (URM) DFHSYDMP. DFHSYDMP used EXEC CICS
  SET SYSDUMPCODE to add an entry for dump code SO1000 to the
  system dump table.
  An attempt was then made to ACQUIRE an IPCONN with a HOST IP
  address that was valid but not in use. Message DFHSO1000 was
  output, with sufficient information to diagnose the issue with
  the IPCONN. A system dump was also taken which was not needed
  to resolve the issue.
  

Problem conclusion

• The EXEC CICS SET SYSDUMPCODE request to add dump code SO1000 to
  the system dump table is commented out in DFHSYDMP. The request
  could be reinstated by editing the URM if a system dump is
  needed to resolve a TCP/IP communications failure reported
  by DFHSO1000.
  

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:

  UI53566

Modules/Macros

• DFHSYDMP
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R100 PSY UI53566

     UP18/02/01 P F801

Fix is available

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