PI10330: CHIN ABEND WITH ABN=5C6-00E50002,,C=R3600.710, LOC=CSQMLPLM.CSQMMTPR+xxxxxxxx

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The CHIN abends with ABN=5C6-00E50002,
  LOC=CSQMLPLM.CSQMMTPR+xxxxxxxx.
  .
  The CHIN joblog showed two abends:
  CSQY291E CSQWDSDM SDUMPX FAILED, RC=00000208,SSID,
    ABN=5C6-00E50002,LOC=CSQMLPLM.CSQMMTPR+xxxxxxxx
  CSQY291E CSQXDMPS SDUMPX FAILED, RC=00000208,SSID,
    ABN= 5C6-00E7014F,LOC=CSQXADPM.CSQXADPM+xxxxxxxx
  .
  The problem has occurred because CSQMMTIN has
  released the MTME at 3B4B7AF0
  (trace entry =0095275=) while EB 14E79448 is
  waiting for a latch on the MTME.
  The problem occurs as CSQMMTPR releases the
  MTME synonym chain latch during
  CSQM_CHECK_MSG_TOKEN_MARK processing.
  .
  Dump Title:
  SSID,ABN=5C6-00E50002,U=STCMQMP ,C=R3600.710.ASMC-
  CSQVUNLX,M=CSQVLFRR,LOC=CSQMLPLM.CSQMMTPR+xxxxxxxx
  .
  Symptom             Description
  -------             -----------
  PIDS/5655R3600      Program id: 5655R3600
  RIDS/CSQMLPLM#L     Load module name: CSQMLPLM
  RIDS/CSQMMTPR       Csect name: CSQMMTPR
  AB/S05C6            System abend code: 05C6
  PRCS/00E50002       Abend reason code: 00E50002
  REGS/0E2B8          Register/PSW difference for R0E: 2B8
  REGS/C04DE          Register/PSW difference for R0C:-04DE
  RIDS/CSQVLFRR#R     Recovery routine csect name: CSQVLFRR
  .
  Date Assembled:          20130128
  Module Level:            UK91224
  Subfunction:             ASMC CSQVUNLX CSQVXUL0
  .
  PSW: 07741001 80000000 00000000 15350552
  Instruction length: 02   Interrupt code: 000D
  Failing instruction text: 5810C018 0A0DB917 004D5890
  
  Breaking event address: 00000000_00FF3C30
  AR/GR 0-1    00000000/0000000D_40DE0A84
               00000002/00000000_845C6000
  AR/GR 2-3    00000000/00000000_0000001C
               00000000/00000000_3B4B7B00
  AR/GR 4-5    00000000/00000000_00000000
               00000000/00000000_00000000
  AR/GR 6-7    00000000/00000000_14E79448
               00000000/00000000_3B4B7B00
  AR/GR 8-9    00000000/00000000_00000000
               00000000/00000000_00000000
  AR/GR 10-11  00000000/00000000_0000001C
               00000000/00000000_40DDFC80
  AR/GR 12-13  00000000/00000000_15350A30
               00000000/00000000_40DE08D0
  AR/GR 14-15  00000000/00000000_9535029A
               00000000/00000000_00E50002
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: The queue manager issues abend          *
  *                      5C6-00E50002 in CSQMMTPR.               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An MTME block is being located by CSQMMTPR to check if a given
  message on a queue is already marked. After the MTME block was
  located, the synonym chain latch was released.
  At this point, the synonym chain latch is acquired by CSQMMTIN,
  a process scanning the chain for blocks that can be deleted. The
  same block was found and the latch on it acquired.
  CSQMMTPR continues processing and tries to acquire the MTME
  latch. As it is currently held by CSQMMTIN, it waits for the
  latch to become available.
  When the latch becomes available, CSQMMTPR acquires it and
  continues processing. The MTME block however has been freed and
  can be reused.
  This happens, and the data in the control block is cleared,
  including the latch control data.
  When CSQMMTPR reaches the point where the latch is released, it
  detects that the latch control data is inconsistent and abends
  with 5C6-00E50002.
  

Problem conclusion

• The code was changed to prevent the MTME block from being
  deleted whilst the latch is acquired by check_msg_token_mark.
  100Y
  CSQMMTPR
  

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:

  UI17256

Modules/Macros

• CSQMMTPR
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UI17256

     UP14/05/17 P F405

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.