IT26058: MQ channel timeout error log message AMQ9271 reports incorrect error number

APAR status

• Closed as program error.

Error description

• MQ reports AMQ9271 message in the error logs when the channel is
  timing out.
  
  AMQ9271: Channel '<CHANNEL_NAME>' timed out.
  
  EXPLANATION:
  A timeout occurred while waiting to receive from the other end
  of
  channel '<CHANNEL_NAME>'. The address of the remote end of the
  connection was 'x.xx.xx.xxx'.
  ACTION:
  The return code from the select() [TIMEOUT] 65 seconds call was
  4
  (X'4').
  
  In the error message under ACTION section MQ reports that return
  code for select() is 4. But for channel timeout the return code
  should be 0.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects users of MQ queue manager channels over TCP,
  and native MQI client applications (including unmanaged .NET)
  which use TCP communication to a queue manager
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A logic error meant that a cached error code from previous
  select() calls on a TCP socket could be incorrectly considered
  when evaluating the success of a subsequent select() call.
  

Problem conclusion

• The MQ channel code has been modified to disregard previous
  error return codes when issuing a select() call on a TCP socket.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.14
  v9.0 LTS   9.0.0.7
  
  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 BASE M/P

• Fixed component ID

  5724H7261

Applicable component levels