IT29838: Add charts (widgets) to the MQ V9.1 console generates FDC referencing XC130004 from amqzlsa0

APAR status

• Closed as program error.

Error description

• While adding charts using the IBM MQ V9.1 Console (WebUI), the
  following failure data capture (FDC) pattern was generated:
  .
  First an FDC, containing only the date and time, was created,
  followed by the following FDCs
  ZX065030  zxcInitiator  amqzxma0  zrcC_E_INVALID_HANDLE
  ZX061015  zxcSelectSocketAgent  amqzxma0  xecP_E_INVALID_PID
  XC130004  xehExceptionHandler  amqzlsa0  STOP  SIGSEGV
  ZL107060  zlsMainThread  amqzlsa0  xecF_E_UNEXPECTED_RC
  
  The relevant stack from the SEGV FDC is:
  
  | Probe Id          :- XC130004
                                                |
  | Component         :- xehExceptionHandler
                                     |
  | Program Name      :- amqzlsa0
                                                |
  
  O/S Call Stack for current thread
  /opt/mqm/lib64/libmqmcs_r.so(+0xffc3e)[0x7f1b5b949c3e]
  /opt/mqm/lib64/libmqmcs_r.so(+0x120f8a)[0x7f1b5b96af8a]
  /opt/mqm/lib64/libmqmcs_r.so(+0x120668)[0x7f1b5b96a668]
  /opt/mqm/lib64/libmqmcs_r.so(xcsFFSTFn+0x1f4c)[0x7f1b5b96d39c]
  /opt/mqm/lib64/libmqmcs_r.so(xehExceptionHandler+0xe09)[0x7f1b5b
  960de9]
  /lib64/libpthread.so.0(+0xf970)[0x7f1b5b08b970]
  /lib64/libc.so.6(+0x15cff6)[0x7f1b5ac02ff6]
  /opt/mqm/lib64/libmqmcs_r.so(xcsMemcpyFn+0x144)[0x7f1b5ba5f154]
  /opt/mqm/lib64/libmqml_r.so(kqiWaitForMessage+0x153e)[0x7f1b5c55
  cc8e]
  /opt/mqm/lib64/libmqml_r.so(kpiMQGET+0x3df)[0x7f1b5c55f54f]
  /opt/mqm/lib64/libmqml_r.so(zsqMQGET+0x3db)[0x7f1b5c75912b]
  /opt/mqm/lib64/libmqml_r.so(zlsMQGET+0x363)[0x7f1b5c6f94f3]
  /opt/mqm/lib64/libmqml_r.so(zlsProcessMQIRequest+0x376)[0x7f1b5c
  6fc126]
  /opt/mqm/lib64/libmqml_r.so(zlsProcessMessage+0x1de)[0x7f1b5c6f3
  8fe]
  /opt/mqm/lib64/libmqml_r.so(zlsMainThread+0x1156)[0x7f1b5c6f4ad6
  ]
  /opt/mqm/lib64/libmqmcs_r.so(+0x18d2d6)[0x7f1b5b9d72d6]
  /lib64/libpthread.so.0(+0x7e91)[0x7f1b5b083e91]
  /lib64/libc.so.6(clone+0x6d)[0x7f1b5abaa41d]
  
  MQM Function Stack
  zlsMainThread
  zlsProcessMessage
  zlsProcessMQIRequest
  zlsMQGET
  zsqMQGET
  kpiMQGET
  kqiWaitForMessage
  xcsMemcpy
  xcsFFST
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users who put messages outside of syncpoint may be affected by
  this issue.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When putting messages outside of syncpoint, MQ will attempt to
  pass messages directly to a waiting MQGET without first putting
  a message to the queue. A pool of buffers is used for this task
  which should be initialised before each use.  One of the values
  associated with these buffers was not initialised between use
  and this led to a segmentation violation.
  

Problem conclusion

• The code was modified so that memory was correctly initialised.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.1 CD    9.1.5
  v9.1 LTS   9.1.0.4
  
  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

  IBM MQ APPL M20

• Fixed component ID

  5725S1400

Applicable component levels