PI52256: DFHDS0002 A SEVERE ERROR (CODE X'0072') HAS OCCURRED IN MODULE DFHDSSR. CISE, RESUME_ALREADY_RESUMED.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• CICS TS 5.2 using IPIC connections, CICS to CICS.
  During a period where IPIC connectivity is suffering
  many HEARTBEAT INTERVAL timeouts indicated by messages :
  
  DFHIS1050 11/02/2015 20:26:23 HEARTBEAT RESPONSE TIMEOUT IN
  IPCONN IP1C.
  
  DFHIS2011 11/02/2015 20:26:23 FORCEPURGE ISSUED SUCCESSFULLY FOR
  1 TASKS USING THE RECEIVE SESSIONS OF IPCONN IP1C. THERE ARE
  CURRENTLY 1 TASKS ACTIVE OF WHICH 1 ARE CURRENTLY BEING PURGED
  .
  CICS takes a DFHDS0002 abend :
  
  DFHDS0002 CP65 A SEVERE ERROR (CODE X'0072') HAS OCCURRED IN
  MODULE DFHDSSR.
  Filtering the trace in DS0002 dump we see :
  
  task number 00034  CISR
  task number 00035  CISE
  
  00035 QR DS 0004 DSSR  ENTRY SUSPEND
                   00810005,IS_ERROR,NO,IS_ERROQ
  00035 QR DS 0005 DSSR  EXIT  SUSPEND/OK
  00035 QR DS 0004 DSSR  ENTRY SUSPEND
                   00810005,IS_ERROR,NO,IS_ERROQ
  00034 QR DS 0004 DSSR  ENTRY RESUME    00810005
  00034 QR DS 0005 DSSR  EXIT  RESUME/OK
  
  00035 QR DS 0005 DSSR  EXIT  SUSPEND/OK
  00034 QR DS 0004 DSSR  ENTRY RESUME    00810005
  00034 QR DS 0072 DSSR  *EXC* RESUME_ALREADY_RESUMED
                         RESUME,00810005
  CISR transaction tried to resume CISE but CISE is already
  resumed and this causes the DFHDS0002 error and dump.
  .
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHDS0002 a severe error (CODE X'0072') *
  *                      occurred in module DFHDSSR.             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  There is a CICS region which has many IPIC connections to other
  CICS regions. A connection error is detected and CISE is resumed
  to handle that. A flag will be turned off once CISE gets control
  and starts to run. This flag is used for CISR to decide whether
  CISE should be resumed when there is a conversation error.
  As the CICS region is currently under stress, CISE doesn't get
  control to run for a while.
  
  In this time slot, a conversation error is detected and CISE is
  resumed for the second time, as the flag which should have been
  turned off is still on. Now the suspend token is in resumed
  status. Then CISE starts to run, it detaches the error chains
  for error handling, therefore the ISSS error queue is empty.
  Then another connection error is detected, CISR resumes CISE for
  the third time as the ISSS error queue is empty. Because the
  suspend token is already in resumed status, the resume operation
  fails with exception already resumed. This causes a DFHDS0002
  error message with a system dump.
  

Problem conclusion

• DFHISRR has been changed to make sure there is no DFHDS0002
  error message and system dump if a resume is issued when the
  corresponding Suspend Token is already in resumed status.
  

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:

  PI57932 UI36456

Modules/Macros

• DFHISRR
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R900 PSY UI36456

     UP16/04/01 P F603

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.