IZ18142: ENDMQM CAN TAKE MANY MINUTES TO END THE QUEUE MANAGER IF THERE ARE ACTIVE SVRCONN CHANNELS

WebSphere MQ V6.0 Fix Pack 6.0.2.5
WebSphere MQ 6.0 for HP OpenVMS Alpha and Itanium - Fix Pack 6.0.2.7
WebSphere MQ 6.0 for HP OpenVMS Alpha and Itanium - Fix Pack 6.0.2.10 (FP03)

APAR status

• Closed as program error.

Error description

• A customer using endmqm found that their queue manager
  would take up to 10 minutes to end if there were any SVRCONN
  channels running when the endmqm command was issued.
  
  No errors or FFSTs were reported. Hangdoc (SIGUSR2/amqldbgn)
  FFSTs revealed that endmqm is stuck inside rrxStopAllChannels fo
  a long time, even though the channel threads have all received
  MQRC_CONNECTION_BROKEN from their MQI calls.
  

Local fix

• test fix supplied to customer
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users who issue endmqm at a time when SVRCONN channels are
  active who need the queue manager to end quickly. There is a
  subtle timing condition which triggers the delay, so not all
  endmqm commands would be affected.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  During endmqm processing, the endmqm command waits for all
  channel processes to end before it will exit.
  
  There was a defect in the error handling on WMQ SVRCONN
  channels such that the queue manager ending did not result
  in the channel thread shutting down. As a result, the channel
  thread kept running until it eventually timed out due to
  inactivity.
  
  Since endmqm waited for all channels to end, the channel
  delay caused endmqm to run for a long time.
  

Problem conclusion

• The WMQ SVRCONN error handling has been corrected, so that
  queue manager shutdown is detected and SVRCONN channel
  threads will now shut down promptly in response to the
  queue manager ending.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v6.0
  Platform           Fix Pack 6.0.2.5
  --------           --------------------
  Windows            U200292
  AIX                U815929
  HP-UX (PA-RISC)    U815636
  HP-UX (Itanium)    U815818
  Solaris (SPARC)    U815659
  Solaris (x86-64)   U815928
  iSeries            tbc
  Linux (x86)        U815767
  Linux (x86-64)     U815808
  Linux (zSeries)    U815805
  Linux (Power)      U815806
  Linux (s390x)      U815807
  
  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

  WMQ LIN X86 V6

• Fixed component ID

  5724H7204

Applicable component levels

• R600 PSY

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