PI42285: DFHSO0002 AN ABEND (CODE 0C4/AKEX) HAS OCCURRED AT OFFSET X'14A2' IN MODULE DFHSOS22.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You are running CICS/TS R5.1 and do a TCPIP_RECEIVE and get the
  error DFHSO0002 An abend (code 0C4/AKEX) has occurred at offset
  X'14A2' in module DFHSOS22. The abend happened because of a
  FIELD named LM_LOCK_OWNER had a value of ZEROS (00000000).
  
  
  
  
  
  
  
  
  
  Additional Symptom(s) Search Keyword(s): KIXREVSLY
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHSO0002 An abend (code 0C4/AKEX) has  *
  *                      occurred in module DFHSOS22.            *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Two SSL enabled CICS regions SYSA and SYSB are connected via
  IPIC connection. SYSA sends a heartbeat command to SYSB. SYSB
  returns OK response and SYSA socket listener receives the
  response. However, before socket pass the response to IS, task
  lost control. After 10 seconds interval, IS gets response
  TIMED_OUT. A second try to send heartbeat command is made and
  IS gets exception HEARTBEAT_TIMEOUT.
  CIST task is attached to terminate connection. All sockets and
  web sessions are freed. Then the task who received response got
  control and tries to pass response to IS. A program check AKEA
  happens because the socket is already freed and now is an
  invalid address.
  

Problem conclusion

• IS domain has been changed to defer the connection termination
  until the data receiving in CISR is done. This is to make
  sure the sockets and web sessions can not be freed when they
  are in use.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

  PI33796

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

  UI34478

Modules/Macros

• DFHCIS4  DFHISAL  DFHISCO  DFHISCOP DFHISCU  DFHISDM  DFHISDUF
  DFHISEM  DFHISEMP DFHISFS  DFHISIC  DFHISIF  DFHISIS  DFHISJU
  DFHISLQ  DFHISLQP DFHISPH  DFHISPHP DFHISPRP DFHISRE  DFHISRR
  DFHISRRP DFHISRS  DFHISRSP DFHISSR  DFHISST  DFHISTRI DFHISUE
  DFHISXF  DFHISXM  DFHISXS  DFHISZA  DFHMIRS
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R900 PSY UI34478

     UP16/01/23 P F601

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.