PI98233: DFHTR0004 CICSREGN A POSSIBLE LOOP HAS BEEN DETECTED AT OFFSET X'FFFF' IN MODULE DFHTRPT.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Had a task which appeared to be looping, turned on auxiliary
  trace to determine what the problem was.  Shortly afterwards
  received the TR0004 message and dump.
  .
  Here's a partial view of the failing Task's STACK.
  .
     3D2DC080 0B40 Sub  3815E300 B8167EA0 009BA0     DFHFCVS
     3E337040 0A90 Sub  38153500 B81539DE 0004DE     DFHFCLJ
     3E337AD0 0340 Dom  36A518F0 36A52F41 001651 *Y* DFHTRPT
     3E337E10 1290 Dom  36AAE6B0 36AB31BF 004B0F     DFHMEME
                   Int   +003E3C 36AAE9A4 0002F4     SEND
                   Int   +001848 36AB25D4 003F24     CONTINUE_SEND
     3E3390A0 0710 Dom  36B71CA8 B6B73862 001BBA     DFHDUDU
                   Int   +000C6C B6B71EBA 000212     SYSTEM_DUMP
  .
  A Task performs EXEC CICS REWRITE.  That caused DFHFCLJ to be
  called.  DFHFCLJ did NOT do a DFHTRPTM CALL CLEAR to trace
  module entry, because FC Level 2 tracing was off.  At some
  point a user used CETR to set component tracing for FC to ALL.
  DFHFCLJ then DID do a DFHTRPTM CALL to trace module exit,
  because FC Level 2 tracing was now on.  The problem is that the
  "exit"  DFHTRPTM CALL does not clear the TRPT domain call
  plist, and so it is incorrect.  DFHTRPT goes into a loop,
  because the plist is bad, and the TR0004 abend occurs.
  
  Additional Symptom(s) Search Keyword(s): KIXREVxxx
  DFHKE0303  A RECURSIVE ABEND HAS BEEN DETECTED BY THE KERNEL
   DOMAIN.
  Above message is followed by a KERNDUMP.
  Kernel error data shows a program check loop in modules DFHTRPT
  and DFHTRPX before the task is finally being abended as runaway.
  0C4 S0C4 abend0C4 abendS0C4
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS Users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHTRPT loops while processing DFHFCLJ  *
  *                      Exit trace point.                       *
  ****************************************************************
  * RECOMMENDATION: .                                            *
  ****************************************************************
  DFHFCLJ is active.
  CETR is used to change component tracing for FC to level 2.
  DFHFCLJ calls DFHTRPT to write a X'0BC1' FCLJ_TRACE_EXIT
  trace entry with an incorrect DFHTRPT_ARG parameter list.
  This causes a loop in DFHTRPT around labels ALLOC_SPACE and
  CDS_LOOP. The loop is detected and MsgDFHTR0004 is issued.
  

Problem conclusion

• DFHFCLJ has been changed to clear the DFHTRPT_ARG plist before
  use.
  

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:

  UI56501 UI56502 UI56503

Modules/Macros

• DFHFCLJ
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R000 PSY UI56503

     UP18/06/14 P F806

• R100 PSY UI56502

     UP18/06/14 P F806

• R900 PSY UI56501

     UP18/06/15 P F806

Fix is available

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