PH34827: DFHSM0002 A SEVERE ERROR (CODE X'0D0A') HAS OCCURRED IN MODULE DFHSMMF. DOUBLE FREEMAIN OF TIOA AFTER CEKL FORCE PURGE.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• On a CICS in PRODUCTION, customer got a lot of abends :
  The
  first abend appeared when a transaction, after 10 minutes
  elapsed, was purged :
  F TOTO,CEKL SET TASK(xxxx) FORCEPUR
  
  Then:
  +DFHSM0002 A severe error (code X'0D0A') has occurred in
  module DFHSMMF.
  After this severe error ( code X'0D0A' ), they
  got a lot of:
  DFHSM0002 A severe error (code X'030D') has
  occurred in module DFHSMGF
  until CICS failed.
  
  DFHSM0002 '0D0A'
  is caused by a double freemain.
  The first freemain is in
  routine FREESMMC. The TIOA is being freed because the TIOA is
  not large enough.
  In this case, the data length at address
  2ECE0020 is 0778. The length needed to accommodate the new data
  is length 8C8.
  The second freemain is in routine FREEMAIN_SMMC
  called by FREEMAIN_SPECIFIC when TCTEFMSA is non-zero. TCTEFMSA
  contains address 2ECE0020.
  
  Dumps show the same symptoms
  resulting from a PURGE of a task.
  
  The first freemain occurs in
  DFHZRVS when a new TIOA is obtained because the current one is
  not large enough and therefore the overlength data flag is set.
  
  The old TIOA is then free'd, this however does not clear out
  the TCTECDSV field which was populated with this TIOA
  previously when a SEND with Change Direction was issued.
  As
  this field is populated, when DFHZFRE runs, it thinks that it
  needs to free the TIOA pointed to by this field, which results
  in the error.
  

Local fix

• NA
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS Users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Message DFHSM0002 code X'0D0A' is       *
  *                      received after a CICS application       *
  *                      issues an EXEC CICS CONVERSE for a      *
  *                      3270 terminal.                          *
  ****************************************************************
  CICS has been configured with HPO=YES. A CICS application
  issues an EXEC CICS CONVERSE for a 3270 terminal.
  CICS issues a SEND, with change direction, to VTAM.
  Before the RECEIVE completes, the TASK is FORCEPURGED.
  Message DFHSM0002 is then issued to report a severe error with
  code X'0D0A' in module DFHSMMF.
  The problem is that an attempt is being made to FREEMAIN
  a TIOA that has already been freed.
  
  KEYWORDS: TCTECDSV TCTTOSS FREESMMC TCASCSA
  

Problem conclusion

• DFHZRVS been changed to clear TCTECDSV when the addressed TIOA
  is FREED.
  

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:

  UI75334 UI75335

Modules/Macros

• DFHZRVS
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R200 PSY UI75335

     UP21/05/12 P F105

• R300 PSY UI75334

     UP21/05/12 P F105

Fix is available

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