PM74806: DFHWB0001 AN ABEND (CODE 0C4/AKEA) HAS OCCURRED AT OFFSET X'3620' IN MODULE DFHWBSV. 12/11/23 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• After applying maintenance including APAR PM59370 an abend0C4
  PIC4 may occurs in mod DFHWBSV (UK79032) at offset x'3620'.
  Failure is accompanied with CTG timeout message
  'CTG8430I Closed IPIC connection to CICS server ....'
  from an IPIC-connected CTG.
  Kernel stack for tranid CISR shows following module flow:
      DFHAPLI1
      CICS_INTERFACE
      DFHISRR
      DFHISRR_PROCESS_INPUT_QUEUE
      DFHISRR_PROCESS_IS_HEADER
      DFHISRR_RECEIVE_ZERO_REQUEST
  *Y* DFHWBSV
      WBSV_READ_REQUEST_ROUTINE
      WBCM_READ_MESSAGE
      WBCM_READ_CHECK_$READY_IN_BUF_B
      DFHMEME
  Exception trace entry is:
  WB 0D02 WBSV  *EXC* RECOVERY_ENTERED      READ_REQUEST,00000000
  

Local fix

• na
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users with PM59370  applied.        *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHWB0001 AN ABEND (CODE 0C4/AKEA)      *
  *                      AT OFFSET X'3620' IN MODULE DFHWBSV.    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  After applying APAR PM59370 an abend0C4 may occur in module
  DFHWBSV at offset x'3620'.
  This can happen if the CISR task loses control between
  receiving the DRAIN command to close the IPCONN and
  issuing an ASYNC RECEIVE to wait for the next request.
  In the time that CISR loses control, it is possible for the
  CIST task to clear the ISSS_WB_SESSION token which is used
  by CISR for the ASYNC RECEIVE.
  This problem can only occur during the close processing of the
  second socket.
  Additional keywords: 0C4 OC4 abend0C4
  

Problem conclusion

• UK78713 UK78714
  DFHISRR has been changed so that the ISSS_WB_SESSION token is
  validated before CISR issues an ASYNC RECEIVE request.
  

Temporary fix

•             *********
              * HIPER *
              *********
  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:

  UK90241 UK90242 PM84331

Modules/Macros

•    DFHISCO  DFHISEM  DFHISRE  DFHISRR
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R600 PSY UK90241

     UP12/12/15 P F212 ®

• R700 PSY UK90242

     UP12/12/15 P F212 ®

Fix is available

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