PM83754: CONA TASK receives ABEND 0E0 RC28 / ASRB IN XQAB

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A problem occurred where the CMAS abended with a DFHSR0606
  0E0/AKEB abend.  The CMAs then terminated.  As a result, the
  MAS abended with a DFHAP0001 ASRB abend in XQAB and also
  terminated.  The abending task is the CONA task whose active
  stack was:
  .
   Task Meth
     28 XLOP
     28 NLRA
     28 NQTK
     28 NQGR
     28 NQK3
     28 NQGR
     28 NQRA
     28 XQPQ
     28 XZPT
     28 XQPQ
     28 XQAB
  .
  The ASRB abend was for a 0E0 program check with interuption
  code 28 which states
  .
    "Reserved bit positions in an access list entry token (ALET)
     were nonzero."
  .
  The psw for the abend is pointing into XQAB at offset x'11A' to
  a LOAD (64) instruction:  E300 E014 0004.  The abend is
  occurring due to RegE being x'FFFFFFFF' where it should be
  the address of the XQSB.  We are within the CRAB_FREE_RETRY
  routine where RegE is loaded from the CRAB_QUEUE_ALET which is
  bad (using RegD+108).
  .
  Additional symptoms:
  The CONA task may receive an 0C4 abend occurring in XQPQ around
  offset x'218'. This abend occurs within the label
  PUTQ_GET_QSCB on a CLC instruction: D503 6014 36A4 which fails
  due to Reg6 being x'7FFFF000'.
  .
  Additional Symptom(s) Search Keyword(s): ABENDASRB ABEND0E0
  RC28 PIC28 00000028 IC28 KIXREVrer
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICSPlex SM V4R2M0 Users                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: Various unpredictable results related   *
  *                      to the CPSM QUE component, can occur    *
  *                      when a CPSM single system image (SSI)   *
  *                      request (an API, WUI, RTA, CMCI or CICS *
  *                      Explorer request) sent to a MAS from a  *
  *                      CMAS is timed out.                      *
  *                                                              *
  *                      Results that may occur include, but are *
  *                      not limited to, the following:          *
  *                                                              *
  *                      -  Abend ASRB/S0E0 in method EYU0XQAB   *
  *                         (XQAB) or method EYU0XQBR (XQBR)     *
  *                         while processing the queue data and  *
  *                         index block FREEPOOL chain.          *
  *                                                              *
  *                      -  Abend ASRB/S0E0 or ASRA/S0C4 in      *
  *                         various QUE component methods        *
  *                         (EYU0XQxx) while chaining through    *
  *                         the data or index blocks for a       *
  *                         queue.                               *
  *                                                              *
  *                      -  Invalid or missing data returned to  *
  *                         an SSI request.                      *
  ****************************************************************
  * RECOMMENDATION: After applying the PTF that resolves this    *
  *                 APAR, all CMASes and MASes must be           *
  *                 restarted.  Note that the restarts do not    *
  *                 need to occur at the same time.              *
  ****************************************************************
  When an SSI request is shipped from a CMAS to a MAS, a CPSM work
  queue is passed with the request to the MAS.  After the MAS
  loads the queue with records, the queue is returned to the CMAS,
  which reads the records and adds them to the result queue for
  the request.
  
  Since the normal processing for work queues is to fill them with
  data and then empty them, there is no lock associated with the
  queue to serialize processing.  However, for these work queues
  shipped from a CMAS to a MAS for an SSI request, it is possible
  if the request is timed out, that the MAS will be writing to the
  queue at the same time as the CMAS is reading from it.  This can
  result in the queue and its control blocks being corrupted,
  which can result in various abends or incorrect results.
  

Problem conclusion

• Updates have been made to various methods for the CPSM QUE, KNL
  and SRV components to implement locking for work queues that are
  shipped from a CMAS to a MAS for an SSI request.  This will
  ensure that access to an SSI work queue between a CMAS and MAS
  is serialized, even in the case of a time out.
  

Temporary fix

•             *********
              * HIPER *
              *********
  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:

  PM85764 UK95937

Modules/Macros

•    CJA9DBUG CJB9DBUG CJC9DBUG EYU0DVQD EYU0DVQF
  EYU0DVQL EYU0UQAQ EYU0UQCP EYU0UQCQ EYU0UQDQ EYU0UQGQ EYU0UQIN
  EYU0UQIQ EYU0UQKQ EYU0UQLK EYU0UQPQ EYU0UQPR EYU0UQRS EYU0UQUQ
  EYU0USLR EYU0USRR EYU0XLSR EYU0XQAQ EYU0XQCP EYU0XQCQ EYU0XQDQ
  EYU0XQGQ EYU0XQIN EYU0XQIQ EYU0XQKQ EYU0XQLK EYU0XQPQ EYU0XQPR
  EYU0XQQQ EYU0XQRS EYU0XQSQ EYU0XQTQ EYU0XQUQ EYU0XSLR EYU0XSRR
  EYU9DBUG EYU9XQFG EYU9XQFI EYU9XQPU EYU9XQP3 EYU9XQP4 EYU9XQP6
  EYU9XQRU EYU9XQR3 EYU9XQR4 EYU9XQR6 EYU9XSPU EYU9XSP3 EYU9XSP4
  EYU9XSP6 EYU9XSRU EYU9XSR3 EYU9XSR4 EYU9XSR6
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R70M PSY UK95937

     UP13/07/22 P F307

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.