PM52081: DFHSM0002 A SEVERE ERROR (CODE X'030F') HAS OCCURRED IN MODULE DFHSMGF DUE TO DOUBLE FREEMAIN OF AN APAID 12/03/08 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You receive message:
  .
  DFHSM0002 RGNNAME A severe error (code X'030F') has occurred in
            module DFHSMGF.
  .
  In the Internal Trace you see the following exception:
  .
  *EXC* - Quickcell_freemain_QPF_already_free - FUNCTION(FREEMAIN)
          SUBPOOL_TOKEN(21212121 , 000000B5) ADDRESS(12121212)
          REMARK(AID)
  .
  TASK 56242 does an EIP START for TERM 0101 TRAN NAME at SYSID
  SYS1.  A CSNC Task 00023 is attached to kick off the CRSR Task
  and gets suspended because Task 56241 owns the SMLOCK while
  running on a L8 TCB.  As a result, TASK 16576 gets to run, and
  issues a Syncpoint involving SYSID SYS1.  This does a RESET_AID
  _QUEUE and also a CANCEL_AID, and Freemains the APAID31 QPH
  that's going to be used in the CRSR Attach that's still pending
  from the SUSPEND.  When the Syncpoint ends, CSNC gets
  control back on the QR TCB and attaches CSRS TASK 56243, which
  then tries to Freemain the APAID31 QPH. This results in SM0002
  because the APAID31 QPH had been freemained by 16576 during the
  earlier Syncpoint.
  
  .
  Additional Symptom(s) Search Keyword(s):
  KIXREVSLD
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHSM0002 A severe error (code X'030F') *
  *                      has occurred in module DFHSMGF due to   *
  *                      double FREEMAIN of APAID31 QPH AID      *
  *                      storage after APAR PM27536.             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A user transaction issues a START command with the TERMID
  option. As the specified terminal id is remote transaction CSNC
  issues an ATTACH request for the remote scheduler transaction
  CRSR. DFHXMAT attach processing for CRSR becomes suspended on a
  getmain (remark XMTXN) because the SM_LOCK is held by another
  task.
  Whilst CSNC is suspended another task runs and issues a
  SYNCPOINT involving the remote system causing DFHALP
  RESET_AID_QUEUE processing to run. DFHALP finds the CRSR AID and
  CANCEL_AID processing runs to the freemain the AID.
  Later when CSNC is resumed attach processing completes and a
  second attempt is made to free the CRSR AID. This freemain
  attempt fails with the reported symptoms. DFHSM0002 A severe
  error (code X'030E'or X'030F') has occurred in module DFHSMGF,
  and a system dump is taken.
  
  Additional keywords: MSGDFHSM0002 SM0002 SMLOCK
  

Problem conclusion

• UK63430 UK67848 UK63800 UK75374 UK75381
  
  The CICS Terminal Allocation Program, DFHALP, has been changed
  for the reported problem. The DFHALP RESET_AID_QUEUE routine has
  been changed so that it will no longer invoke CANCEL_AID
  processing for a CRSR AID if it detects that CRSR is in the
  process of being attached.
  

Temporary fix

• 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:

  PM60213 UK77015 PM87918

Modules/Macros

•    DFHALP
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R600 PSY UK77015

     UP12/04/03 P F204

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.