IT43783: MQ processes and commands might fail if the qm.ini file containsunexpected character and MQ trace is enabled

APAR status

• Closed as program error.

Error description

• An unexpected character in the qm.ini file when MQ tracing is
  turned on for the Queue Manager
  caused crash of amqrmppa and runmqchl processes affecting
  stability of MQ Queue Manager.
  The issue might also affect other MQ processes and also
  commands(e.g. strmqm).
  
  FDC generated by runmqchl:
  
  Component         :- xehExceptionHandler
  Program Name      :- runmqchl
  Major Errorcode   :- STOP
  Probe Type        :- HALT6109
  Probe Severity    :- 1
  Probe Description :- AMQ6109S: An internal IBM MQ error has
  occurred.
  Arith1            :- 11 (0xb)
  Comment1          :- SIGSEGV: address not mapped((nil))
  
  O/S Call Stack for current thread
  /opt/mqm/lib64/libmqmcs_r.so(+0x1058af)[0x7ff1180ed8af]
  /opt/mqm/lib64/libmqmcs_r.so(+0x1293aa)[0x7ff1181113aa]
  /opt/mqm/lib64/libmqmcs_r.so(+0x128383)[0x7ff118110383]
  /opt/mqm/lib64/libmqmcs_r.so(xcsFFSTFn+0x20eb)[0x7ff11811351b]
  /opt/mqm/lib64/libmqmcs_r.so(xehExceptionHandler+0x6c9)[0x7ff118
  1050e9]
  /usr/lib64/libpthread.so.0(+0x12dd0)[0x7ff11782add0]
  /opt/mqm/lib64/libmqmcs_r.so(+0x2296a2)[0x7ff1182116a2]
  /opt/mqm/lib64/libmqmcs_r.so(+0x229a81)[0x7ff118211a81]
  /opt/mqm/lib64/libmqmcs_r.so(xcsBrowseIniCallback+0x1df)[0x7ff11
  8201d4f]
  /opt/mqm/lib64/libmqmcs_r.so(+0x16b01c)[0x7ff11815301c]
  /opt/mqm/lib64/libmqmcs_r.so(xeiGetTuningParameters+0xe4)[0x7ff1
  18154ec4]
  /opt/mqm/lib64/libmqmcs_r.so(xcsDisplayMessageForError+0x28e)[0x
  7ff1180f9fbe]
  /opt/mqm/lib64/libmqmr_r.so(rrxReportError+0x6cd)[0x7ff118fed8ad
  ]
  /opt/mqm/lib64/libmqmr_r.so(rriCallerEntry+0x7ac)[0x7ff118eefd7c
  ]
  /opt/mqm/bin/runmqchl[0x40139d]
  /usr/lib64/libc.so.6(__libc_start_main+0xf3)[0x7ff1172756a3]
  /opt/mqm/bin/runmqchl[0x401409]
  
  MQM Function Stack
  rriCaller
  rriCallerEntry
  rrxReportError
  xcsDisplayMessageForError
  xeiGetTuningParameters
  xeiReadConfig
  xcsBrowseIniCallback
  xusReadSingleStanza
  xusAddStanzaLineList
  xcsFFST
  
  FDC generated by strmqm:
  
  Probe Id          :- XC130003
  Component         :- xehExceptionHandler
  Program Name      :- strmqm
  Arith1            :- 11 (0xb)
  Comment1          :- SIGSEGV: address not mapped((nil))
  
  O/S Call Stack for current thread
  /opt/mq9206/lib64/libmqmcs_r.so(+0x10589f)[0x7f4fe1acc89f]
  /opt/mq9206/lib64/libmqmcs_r.so(+0x12925a)[0x7f4fe1af025a]
  /opt/mq9206/lib64/libmqmcs_r.so(+0x128233)[0x7f4fe1aef233]
  /opt/mq9206/lib64/libmqmcs_r.so(xcsFFSTFn+0x20eb)[0x7f4fe1af23cb
  ]
  /opt/mq9206/lib64/libmqmcs_r.so(xehExceptionHandler+0x6c9)[0x7f4
  fe1ae40d9]
  /usr/lib64/libpthread.so.0(+0xf630)[0x7f4fe040d630]
  /opt/mq9206/lib64/libmqmcs_r.so(+0x228d92)[0x7f4fe1befd92]
  /opt/mq9206/lib64/libmqmcs_r.so(+0x229171)[0x7f4fe1bf0171]
  /opt/mq9206/lib64/libmqmcs_r.so(xcsBrowseIniCallback+0x1df)[0x7f
  4fe1be05ff]
  /opt/mq9206/lib64/libmqml_r.so(zslStartQM+0x13e9)[0x7f4fe26321c9
  ]
  strmqm[0x400b49]
  /usr/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f4fdfe4e555]
  strmqm[0x400bb7]
  
  MQM Function Stack
  xcsBrowseIniCallback
  xusReadSingleStanza
  xusAddStanzaLineList
  xcsFFST
  

Local fix

• Find and remove the unexpected character from qm.ini and restart
  queue manager.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users enabling MQ trace when the qm.ini file contains an
  unexpected character.
  
  
  Platforms affected:
  AIX, Linux on x86-64, Windows
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A defect in validating the stanzas in the qm.ini file caused a
  memory exception and resulted in a failure of the MQ process or
  command if trace was enabled.
  

Problem conclusion

• MQ code has been modified to resolve the issue in validating the
  stanzas in the qm.ini file.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.20
  v9.3 LTS   9.3.0.10
  v9.x CD    9.3.4
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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:

Fix information

• Fixed component name

  MQ BASE V9.2

• Fixed component ID

  5724H7281

Applicable component levels