IT39773: MQ appliance might reload when querying status of queue manager or system resources

APAR status

• Closed as program error.

Error description

• The MQ Appliance might reload due to a watchdog restart when
  querying status of queue manager or system resources using
  WebGUI or REST API.
  
  When this occurs, the following can be observed on the
  backtrace file generated at the time of the reload.
  
  WATCHDOG RESTART is detected.
  Died from signal 12 (USR2)
  Reason Hint: [WATCHDOG]
  Referencing 0x0000000000000000 at 0x7f9056066ec6 in
  /lib64/libc.so.6 + 0x15cec6
  Signal is sent by PID: 475 UID: 0 Process: [main]
  Component=_SourceProtocol, Domain=_NoDomain
  
   #0    0x7f9056066ec6 in /lib64/libc.so.6 + 0x15cec6,
  basepointer 0x00007f8f1d1e9740
  ...
  Reason Hint: [WATCHDOG]
  Referencing 0x0000000000000000 at 0x7f9055fd30fd in
  /lib64/libc.so.6 + 0xc90fd
  Signal is sent by PID: 475 UID: 0 Process: [main]
  Component=xmlfirewall, Domain=default, Config=map
  Action=1, ActionName=map-match_90_304
  ...
  #4    0x02bcc7fb in Private::dpMqInfoData::RunMq(...)
  #5    0x02bcd8a4 in dpMqInfo::GetQueueManagersStatus(...)
  #6    0x00ac47e7 in  drQueueManagersStatus::Snapshot(...)
  #7    0x7f906339193c in dpStatusSnapshot::BuildSnapshot(...)
  #8    0x7f906339056b in dpStatusFactory::Open(...)
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using WebGUI or REST API to query queue manager status or
  system resources
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A defect in MQ appliance code which manages querying status of
  queue manager and system resources incorrectly triggered a hung
  process detection timeout resulting in appliance reload.
  

Problem conclusion

• MQ appliance code which manages querying status of queue manager
  and system resources has been modified to prevent this reload
  due to an incorrect hung process detection.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.6
  
  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 APPL M2002 V

• Fixed component ID

  5737H4701

Applicable component levels