IT17711: AGGREGATION STATISTICS INCORRECT FOR TIMEOUT THREADPOOL

APAR status

• Closed as program error.

Error description

• If the AggregateReply node is used with a thread pool of
  timeout threads and Accounting and Statistics is enabled then
  the elapsed time can be over-reported by 5 seconds up to once
  per timeout processed.
  
  The issue is caused by starting the timer before issuing an MQ
  GET using a wait option of 5 seconds. In the case where a
  timeout has just been processed and another message does not
  arrive the wait time is included in the elapsed time even
  though the thread is only waiting for work to arrive.
  

Local fix

• Setting the env var MQSI_AGGR_WAIT_TIMEOUT controls the length
  of this timeout in ms, reducing this to a smaller value such as
  100 reduces the margin by which the elapsed time is
  over-reported.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM Integration bus version 9 or higher using the
  Aggregation nodes.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  If the AggregateReply node is used with a thread pool of timeout
  threads and Accounting and Statistics is enabled then the
  elapsed time can be over-repoted by 5 seconds up to once per
  timeout processed.
  
  The issue is caused by starting the timer before executing an MQ
  GET using a wait option of 5 seconds. In the case where a
  timeout has just been processed and another message does not
  arrive the wait time is included in the elapsed time even though
  the thread is only waiting for work to arrive.
  
  There are a number of resource name changes between WebSphere
  Message Broker and IBM Integration Bus Version 9.0.  For details
  visit
  http://pic.dhe.ibm.com/infocenter/wmbhelp/v9r0m0/topic/com.ibm.e
  tools.mft.doc/bb23814_.htm
  

Problem conclusion

• The idle time spent in an MQ GET operation is no longer counted
  in the time taken to process as message.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v10.0      10.0.0.10
  v9.0       9.0.0.9
  
  The latest available maintenance can be obtained from:
  http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
  
  If the maintenance level is not yet available,information on
  its planned availability can be found on:
  http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
  ---------------------------------------------------------------
  

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

  INTEGRATION BUS

• Fixed component ID

  5724J0530

Applicable component levels

• R900 PSY

     UP