OA62134: MULTIPLE TASKS ABENDING AT ONCE; DUMP PRODUCED INDICATING "SERIALIZATION DEADLOCK AVOIDED"

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Many tasks on the system are abending at one time. Several of
  these tasks are all trying to write to the same SYSUDUMP.
  Eventually a dump is produced:
  
  COMPID=5752-SCDMP,COMPON=ABDUMP,ISSUER=IEAVTABD,ABDUMP SERIA
  LIZATION DEADLOCK AVOIDED FOR xxxxxxx
  
  ANALYSIS:
  At the time of the dump one TCB owns the SYSZTIOT as well as
  SNAP resource MAJOR=SYSIEA01 MINOR=IEA.  That TCB is waiting in
  IATDMEB3+3146 at base level V2R4.  That TCB  does a CALLRTM to
  kill the jobstep of a jobstep TCB, but the jobstep TCB is
  already going through its own 04E ABEND.  While  waiting, JES3
  is holding the resources and other tasks are queuing up for
  them.  The DSB in-hand for TCB the initial TCB is SYSUDUMP.
  
  There is the following code in IATDMEB3 at label EBSCT036:
  
  CLC   DSBDDNAM,=C'JESYSMSG'  SYSTEM MESSAGE DATA SET? @WA35217
  JNE   EBSCT041            NO, Go abend                @OA11567
  Since this is SYSUDUMP, JES3 takes the jump and proceeds to
  attempt the CALLRTM (and then indefinitely waits for the
  CANCEL).  The CANCEL will never come since the jobstep TCB is
  already being processed by RTM for the 04E ABEND.
  
  KNOWN IMPACT:
  JES3 waits indefinitely for SYSUDUMP when multiple tasks abend
  at once.
  
  
  VERIFICATION STEPS:
  1. Multiple tasks abending at once.
  2. Tasks appear stuck in the system.
  3. Dump produced with the following title:
  
  COMPID=5752-SCDMP,COMPON=ABDUMP,ISSUER=IEAVTABD,ABDUMP SERIA
  LIZATION DEADLOCK AVOIDED FOR xxxxxx
  
  The projected closing code is PER for HJS77B0 and above.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of HJS77B0, HJS77C0, and                           *
  * HJS77D0.                                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Task waits in module IATDMEB3                                *
  * holding SYSZTIOT resource after line                         *
  * limit exceeded for SYSUDUMP.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Multiple tasks for a job were abending and writing to
  SYSUDUMP.  The line limit for SYSUDUMP had been set to
  x'00FFFFFF', which was meant to indicate no limit, but
  eventually, this line limit was exceeded.  Module IATDMEB3
  issued CALLRTM and waited forever, expecting the CALLRTM to
  cancel the task, but the cancel did not occur.
  

Problem conclusion

• Installation On (All Processors)
               Order (Any)
  Activation   Order (Any)
               Type/JES3 restart (Hot,Local)
               Type/IPL (Rolling/DynLPA)
               CLPA (Yes)
  (See Apar II07968 for definitions)
  
  Module IATDMEB3 has been changed to bypass ABEND722
  processing for SYSUDUMP, SYSABEND, and SYSMDUMP.
  
  APAR OA62134 prereq's (and sup's) for FMID HJS77B0:
  Pre's: * NONE *
  APAR OA62134 prereq's (and sup's) for FMID HJS77C0:
  Pre's: * NONE *
  APAR OA62134 prereq's (and sup's) for FMID HJS77D0:
  Pre's: * NONE *
  

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:

  UJ07436 UJ07437 UJ07438

Modules/Macros

• IATDMEB3
  

Fix information

• Fixed component name

  JES3

• Fixed component ID

  5752SC1BA

Applicable component levels

• R7D0 PSY UJ07438

     UP21/12/28 P F112

• R7B0 PSY UJ07436

     UP21/12/28 P F112

• R7C0 PSY UJ07437

     UP21/12/28 P F112

Fix is available

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