PH61498: ABEND0C4 WHEN THE NOTIFY EXIT IS CALLED BY CSLSSR20 DURING QCF SERVER SHUTDOWN

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When shutting down the SCI address space and then shutting down
  the QCF Server, an ABENDS0C4 may occur in the Notify Exit module
  called by CSLSSR20 if multiple QCF servers that belong to the
  same PLEX are shut down at the same time.
  
  At this time, one of the following messages is shown:
  CSL3110E MEMBER qcf_sever_name EXIT SRB ABEND S0C4 PSW=psw
  RSN=00000011 CSLSSR20=module_address EXIT=exit_address IN EXIT
                               or
  CSL3110E MEMBER qcf_sever_name EXIT SRB ABEND S0C4 PSW=psw
  RSN=00000010 CSLSSR20=module_address EXIT=exit_address IN EXIT
                               or
  CSL3110E MEMBER qcf_sever_name EXIT SRB ABEND S0C4 PSW=psw
  RSN=00000004 CSLSSR20=module_address EXIT=exit_address IN EXIT
  
  RSN=00000011 is abended at IQCZPLM0 + x'0424'
  RSN=00000010 is abended at IQCZPLM0 + x'041C'
  RSN=00000004 is abended at IQCZXNF0 + x'030A'
  
  S0C4
  

Local fix

• Either of the following two steps will alleviate the abend:
   - Shut down the QCF Server and then shut down the SCI address
     space.
   - When shutting down multiple QCF Servers belonging to the same
     PLEX, shut them down in order with an interval of about 10
     seconds.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IBM IMS Queue Control Facility for z/OS  *
  *                 Version 3 Release 2 (FMID=H0GN320) users.    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When shutting down the SCI address      *
  *                      space and then shutting down the QCF    *
  *                      Server, an ABENDS0C4 may occur in the   *
  *                      Notify Exit module called by CSLSSR20   *
  *                      if multiple QCF servers that belong to  *
  *                      the same PLEX are shut down at the same *
  *                      time.                                   *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  If the SCI address space has already been stopped, when the
  Notify Exit receives a notification from the QCF Server on
  another node during the QCF server shutdown process, it may
  reference an area that has already been freed. This results in
  an abend with S0C4.
  
  At this time, one of the following messages is shown:
  CSL3110E MEMBER qcf_sever_name EXIT SRB ABEND S0C4 PSW=psw
  RSN=00000011 CSLSSR20=module_address EXIT=exit_address IN EXIT
  or
  CSL3110E MEMBER qcf_sever_name EXIT SRB ABEND S0C4 PSW=psw
  RSN=00000010 CSLSSR20=module_address EXIT=exit_address IN EXIT
  or
  CSL3110E MEMBER qcf_sever_name EXIT SRB ABEND S0C4 PSW=psw
  RSN=00000004 CSLSSR20=module_address EXIT=exit_address IN EXIT
  
  RSN=00000011 is abended at IQCZPLM0 + x'0424'
  RSN=00000010 is abended at IQCZPLM0 + x'041C'
  RSN=00000004 is abended at IQCZXNF0 + x'030A'
  

Problem conclusion

• QCF has been changed to ignore notifications received by the
  Notify Exit during the QCF Server shutdown process.
  

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:

  UI98480

Modules/Macros

• IQCZXNF0
  

Fix information

• Fixed component name

  IMS QUEUE CNTL

• Fixed component ID

  5697E9900

Applicable component levels

• R320 PSY UI98480

     UP24/09/21 P F409

Fix is available

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