OA43846: PE NOT REMOVED FROM PE ENTRY TABLE DURING TERMINATION PROCESSINGRESULTING IN IEA_NO_PETS_AVAILABLE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• During task termination processing for a PAUSEd task RTM calls
  the RB Unpause service (IEAVETPT). During this processing the
  Suspended/Paused Status descriptor (SSD) is freed but the SSD
  address is not removed from the PE entry table. A subsequent
  call to IEAVEDPE by the TCB ESTAE to deallocate the PET returns
  IEA_PE_TOKEN_STALE as the PE has been invalidated. In the
  reported problem recursive abends resulted in
  IEA_NO_PETS_AVAILABLE as all 130560 PETs were used.
  
  IVP instructions:
  1. Get the SSD address for the PAUSE from the unique-1 field of
     the SSRV 11E system trace entry.
  2. Check if SSDFREE is set - the X'08' bit at offset X'10'.
  3. Search the PE entry tables for the SSD address.
     Get the PE segment table address from ECVTPEST and then get
     the PE entry table addresses starting at offset X'10'.
  
  If the SSD address is found in one of the PE tables then this
  is your problem.
  
  From the reported problem dump:
  
  00 00AE 006CC300  SSRV 11E  9518D502           0C950B88 00000000
  
  IP CBF 0C950B88 STR(SSD)
  SSD: 0C950B88
  +0000 SSD...... SSD       NEXT..... 0E997EA0  PREV..... 00000000
  +000C ASCB..... 00000000  SEQN..... 00061F    RSCODE... 00000000
  This SSD is on the SSD free queue.
  +0018 SSRB..... 00000000  FLAGS.... 00        INDEX.... 000000
  +0024 WEB...... 00000000  LOCK..... 00000000  _Owner_A. 00000000
  +0030 _Next_On. 00000000  _Prev_On. 00000000  _Dealloc. 000000
  
  IP CBF ECVT
  ECVT: 01AAEE18
  ...
  +024C  PEST..... 0265D450
  
  0265D450   C9C8C1D7   C5E2E340   00010033   00000003  | IHAPEST
  0265D460   01FF5000   1412A000   00000000   00000000
  
  1412A000   C9C8C1D7   C5C5E340   00000000   00000000  | IHAPEET
  1412A010   0286A798   0286A7E0   0286A3F0   0286A1F8
  ...
  1412A0C0   0C9508B8   0C950B40 **0C950B88** 133177E0
  1412A0D0   0C950438   133171B0   80010034   80010035
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users running z/OS HBB7770 or HBB7780.       *
  ****************************************************************
  * PROBLEM DESCRIPTION: PE entries are not removed from the     *
  *                      PE entry table during task              *
  *                      termination processing.                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Pause elements (PEs) are not removed from the Pause element
  entry table during task termination processing.  The PE is
  represented by a Suspended/Paused Status Descriptor (SSD),
  which does get freed, however, the SSD address remains in the
  PE entry table.  Eventually, this could lead to a table full
  condition resulting in a failed Pause request with a
  IEA_NO_PETS_AVAILABLE nonzero return code.
  
  Note that HBB7790 already has the fix for this problem.
  

Problem conclusion

• In task termination Pause processing, when it frees the SSD,
  add code to remove the PE, represented by the SSD address,
  from the PE entry table.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UA71986 UA71987

Modules/Macros

• IEAVETPT
  

Fix information

• Fixed component name

  SUPERVISOR CONT

• Fixed component ID

  5752SC1C5

Applicable component levels

• R770 PSY UA71986

     UP14/01/29 P F401 Ž

• R780 PSY UA71987

     UP14/01/29 P F401 Ž

Fix is available

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