PH37259: ABEND 0C4 IN DFHSJDM+DAE AND DFHDUTM+5AA WHEN UNINITIALIZED STORAGE IS POPULATED WITH NONZERO VALUES.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You are running module IGVDGNPP for the utility PRIMEPSA in CICS
  TS 5.6.
  
  The utility initialized lowcore storage with nonzero values to
  find potential references to uninitialized storage.
  In this case, CICS is creating the DFHJXSU URIMAP, and obtaining
  the current task userid.
  
  Atypically, the code is running as part of domain
  initialization, and not as a user task, so the domain
  transaction token references lowcore storage.   While the code
  checks for a zero value in the first word of the token, the
  utility has populated that locale with nonzero values, leading
  to the ABENDs.
  KIXREVEAA
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS can abend 0C4 at startup in module *
  *                      DFHSJDM at offset 0xDAE if the z/OS     *
  *                      debug utility IGVDGNPP is being used.   *
  ****************************************************************
  If the z/OS debug utility IGVDGNPP is being used to prime unused
  areas of low core storage with values while CICS is started
  it is possible that CICS will abend with a 0C4 at offset 0xDAE
  in module DFHSJDM.
  
  A message like: "+DFHSJ0001 applid An abend (code 0C4/AKEA)
  has occurred at offset X'0DAE' in module DFHSJDM." will be seen
  in the job log just before the expected "Control is being given
  to CICS." message.
  
  A dump will be taken and another message should then be seen:
  "+DFHDM0105 applid Unsuccessful initialization of DFHSJ
  domain. CICS will terminate."
  
  Lastly, the job log will show: "IEF450I jobname CICS -
  ABEND=S000 U1800 REASON=00000000  920".
  

Problem conclusion

• CICS module DFHSJDM has been modified to avoid this 0C4 abend.
  

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:

  UI76981

Modules/Macros

• DFHSJDM
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R300 PSY UI76981

     UP21/09/02 P F109

Fix is available

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