PM58324: DFHIS0002 0687DFHISXM.DFHIS0998 IPIC CSMI ABEND AIPL DFHXMAB

Obtain the fix for this APAR.

APAR status

• Closed as unreproducible.

Error description

• These messages were issued:
  ---------------------------------------------------------------
  DFHIS0002 severe error code X'0687' occurred in module DFHISXM.
  DFHIS0998 A transaction processing a request
          using IP Interconnectivity has abended with code AIPL
  DFHAC2236 Transaction CSMI abend AIPL in program DFHXMAB
  ---------------------------------------------------------------
  .
  A CICS trace showed these trace entries:
  ---------------------------------------------------------------
  IS 0200 ISIS  ENTRY BIND_RECEIVER
  IS 0201 ISIS  EXIT  BIND_RECEIVER/DISASTER
          FUNCTION(BIND_RECEIVER)
          RESPONSE(DISASTER)
          REASON()
  AP 0687 ISXM  *EXC* BIND_RECEIVER_FAILURE
          FUNCTION(BIND_XM_CLIENT)
  ME 0301 MEME  ENTRY SEND_MESSAGE 2,IS0002,2AEF7E7A ,
  ---------------------------------------------------------------
  .
    This is caused by a timing window when two (2) IPIC
  tasks are processing at the same time
  - one of which is in free processing -
  and the CISR task processing data being received.
    The error leads to an overlay
  of the previous data received
  and a program check while accessing the ISFLD in buffer.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: ALL CICS USER                                *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHIS0002 error code X'0687' in DFHISXM *
  *                      when processing some DPL requests over  *
  *                      IPIC.                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  CICS is processing DPL requests over IPIC.  A subsequent
  request arrives before the previous mirror task has finished
  freeing the IPIC session (ISSB).
  
  The CISR task detects that the session is still in use so
  issues the socket receive to obtain the new request specifying
  that the buffer in the IPIC queued attach block (ISQA) is used
  instead of the buffer in the ISSB.
  
  The mirror task finally frees the session.  It detects that
  there is another task waiting to use the session so it copies
  the ISQA buffer address and length, which is currently 0, over
  to the ISSB.The socket receive finally completes and DFHISRR
  updates the buffer length in the ISQA.  No attempt is made to
  update the length in the ISSB.  The request was large so there
  is still more data to receive from the client.
  
  The new mirror task starts up and sees it has not yet received
  all the client data so it issues a socket receive to get the
  remaining data specifying the start of the ISSB buffer address
  as the area to receive the data in because it believes the
  current length received so far is 0.
  
  The remaining data is received, overlaying the data already in
  the buffer.  When the request is parsed the expected ISFLDs are
  no longer present.  This causes DFHISXM to issue message
  DFHIS0002 with code x'0687' and for the new mirror task to abend
  AIPL.
  
  Additional keywords:
  msgDFHIS0002  msgDFHIS0998  msgDFHAC2236  ABENDAIPL
  

Problem conclusion

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

• DFHISRR has been changed to update the buffer length in the ISSB
  ISQA information has already been transfered to the ISSB.
  

APAR Information

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

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

  UK78489

Modules/Macros

•    DESISRR  DFHISRR  DFHISRRA DFHISRRM DFHISRRP
  DFHISRRT
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R600 PSY UK78489

     UP12/05/12 P F205

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.