IT06029: GRADUAL MEMORY LEAK UNDER VARIED WORKLOAD

APAR status

• Closed as program error.

Error description

• When running workload through the product, such that there are
  periods of activity and inactivity, and using additional
  instances, a small memory leak may be observed.
  
  This occurs when threads are no longer needed and are returned
  to the thread pool - a small amount of memory associated to
  that thread is not correctly freed.
  
  If the leaking process is captured via a memory leak diagnostic
  tool, then the following object will be observed in the unfreed
  stacks:
  
  ImbWlmThreadContext
  
  WLM (Workload Management) does not need to be enabled in order
  for this leak to occur.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM Integration Bus V9.0 using the product under
  varied workload.
  
  
  Platforms affected:
  z/OS, MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When running workload through the product, such that there are
  periods of activity and inactivity, and using additional
  instances, a small memory leak may be observed.
  
  This occurs when threads are no longer needed and are returned
  to the thread pool - a small amount of memory associated with
  that thread is not correctly freed.
  
  If the leaking process is captured via a memory leak diagnostic
  tool, then the following object will be observed in the unfreed
  stacks:
  
  ImbWlmThreadContext
  
  WLM (Workload Management) does not need to be enabled in order
  for this leak to occur.
  
  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 product now ensures that all objects related to Workload
  Management, which are associated with a particular thread, are
  correctly destroyed when that thread returns to the pool.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.0       9.0.0.6
  
  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