PH35547: DFHSJ0002 A SEVERE ERROR (CODE X'0B19') HAS OCCURRED IN MODULE DFHSJJS.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• User was running some CICS Liberty tasks under CEDX on CICS
  5.6 and pressed F3 to end the CEDX session having established
  the environment was running and CICS reported:
  
  +DFHSJ0002 A severe error (code X'0B19') has occurred in module
   DFHSJJS.
  +DFHME0116 (Module:DFHMEME) CICS symptom string for message
   DFHSJ0002 is
   PIDS/5655Y0400 LVLS/730 MS/DFHSJ0002
   RIDS/DFHSJJS PTFS/UI73467
  +DFHDU0201 ABOUT TO TAKE SDUMP. DUMPCODE: SJ0002 ,
  
  The trace showed:
  
  SJ 0B19 SJJS *EXC* - WRONG_TCB - FUNCTION(BUILD_TRANSACTION)
   JVMSERVER(BANK)
   CLIENTPORT(nnnn) CLIENTIPFAMILY(XXX)
   SERVERPORT(XXX)
   SERVERIPFAMILY(XXX) SERVERIPADDR(nnn.nnn.nnn.n)
   CLIENTIPADDR(nnn.nnn.nnn.n) TRANID(CJSA) USERID()
   ZOS_SEC_ACTIVE() URL_BLOCK(22ED4F08 , 00000068)
   ORIGIN_DATA_BLOCK(22E18508 , 000001EC) TRNGRPID(....)
   SECURITY_INIT(NO)
  
  CEMT was showing that task as still waiting on XM_BUILD INQ TA
   STATUS: RESULTS - OVERTYPE TO MODIFY
  
  Tas(0000423) Tra(XXXX) Sus Tas Pri( 001 ) Sta(U ) Use(CICS000)
    Uow(D9617B975FEFCAC0) Hty(XM_BUILD)
  
  
  The problem is caused as follows:
   - use CEDX on a Liberty task
   - Have multiple
  Liberty requests that use the same transaction id.
  This had been done by using different browsers to send them in.
   - Held up those requests so that they did not run. That was
     achieved in this case by setting TCLASS(DFHEDFTC) to have
     MAXACTIVE(1).
   - Exited the EDF session during the first transaction
   - The second transaction to run will get the problem because
     its TXD still has a TCLASS of DFHEDFTC but EDF is no longer
     active for that transaction id.
  
  additional
  keywords & symptoms
  KIXREVDM DFHEDFX 0B19 B19
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DFHSJ0002 code(x'0B19') when using      *
  *                      CEDX to debug Liberty based tasks.      *
  ****************************************************************
  CEDX is being used to debug tasks that have been started in
  Liberty.  Activating CEDX for a transaction causes it to be
  given a temporary TCLASS of DFHEDFTC.  The DFHEDFTC TCLASS
  that is used by CEDX has been set to have a MAXACTIVE of 1 to
  allow each task to be debugged in turn.
  
  A series of Liberty tasks are attached.  The first of these
  drives a CEDX debug session.  The remainder are held up due to
  the TCLASS limit.
  While debugging the first task, the session is terminated.
  This deletes the TS queue entry containing the control record,
  and reverts the TCLASS to its original value.
  
  This change of TCLASS value only affects new tasks and does not
  affect the existing tasks that are held in the TCLASS wait.
  
  The next task in the TCLASS wait gets released and is allowed
  to run.  It still has the DFHEDFTC TCLASS value so during task
  initialisation a CEDX debug session is attempted to be started.
  DFHEDFX changes to the QR TCB and tries to locate the TSQ that
  contains its control information.  The TSQ is not found, so the
  debug session is not started, but DFHEDFX fails to switch back
  to the original T8 TCB.  DFHSJJS then detects that task
  initialisation has completed with the task running on the QR
  TCB instead of the expected T8 TCB.  This causes message
  DFHSJ0002 with code(x'0B19') to be issued along with a system
  dump.
  

Problem conclusion

• DFHEDFX has been updated to move the change mode to the QR TCB
  following the DFHTS GETQ call.
  

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:

  UI76690

Modules/Macros

• DFHEDFX
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R300 PSY UI76690

     UP21/08/13 P F108

Fix is available

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