PK97532: INTERMITTENT SLOW WEB SERVICES PERFORMANCE WHEN INVOKING JAX-WS WEB SERVICE FROM WEBSPHERE APPLICATION SERVER

APAR status

• Closed as program error.

Error description

• When WebSphere Application Server functions as a JAX-WS web
  service client, an intermittent web service performance problem
  can result.
  
  The delay occurs after the client-side JAX-WS handler
  (if present) is invoked and before the actual SOAP message is
  sent to the provider.  Because the delay occurs in the IBM web
  services engine, this problem can be difficult to detect.
  
  Depending on the quality of service coded into the application
  itself, there might be application related timeouts which can
  occur.  However, the problem can occur without the presence of
  any exceptions or errors logged to the SystemOut.log.
  
  
  A com.ibm.ws.websvcs.transport.*=all trace will show
  entries similar to these which repeat:
  
  [8/19/09 18:08:29:658 GMT] 00000047 OutboundConne 1   Enter:
  WSWS3595I: Current pool size: 25. Connections-in-use size: 0.
  Configured pool size: 25
  
  
  In addition, that same trace spec will show long delays in
  executing the .findGroupAndGetConnection() method:
  
  [8/19/09 18:08:03:428 GMT] 00000047 OutboundConne >
  OutboundConnectionCache.findGroupAndGetConnection()
  WAITING_THREADS_THRESHOLD is 5 Entry
  
  <WSWS3595I repeats in between>
  
  [8/19/09 18:08:38:358 GMT] 00000047 OutboundConne <
  OutboundConnectionCache.findGroupAndGetConnection() Exit
  

Local fix

• - Reduce the
  'com.ibm.websphere.webservices.http.connectionPoolCleanUpTime'
  from the default of 180 to 120 seconds
  - Increase the max connections
  'com.ibm.websphere.webservices.http.maxConnection' property from
  default of 25 to 50.
  This will also require increasing the web container thread pool
  size to 100.
  
  This page from the Information Center contains the details:
  HTTP transport custom properties for Web services applications
  http://publib.boulder.ibm.com/infocenter/wasinfo/v6r1/topic/com.
  ibm.websphere.nd.doc/info/ae/ae/rwbs_httptransportprop.html
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Feature           *
  *                  Pack for Web Service users of JAX-WS        *
  ****************************************************************
  * PROBLEM DESCRIPTION: Unnecessary connection delays can       *
  *                      occur in the WebSphere Application      *
  *                      Server web services client.             *
  ****************************************************************
  * RECOMMENDATION:  Apply a fixpack containing this APAR        *
  ****************************************************************
  Connection delays in the WebSphere Application Server web
  services client can result in poor web service request
  performance.
  

Problem conclusion

• The recently used connection management was improved to prevent
  repeated connection delays.
  
  PK94494 addresses this problem in the V7 WebSphere Application
  Server.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 6.1.0.31.  Please refer to the Recommended Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  PK94494

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBSERVIC FEATU

• Fixed component ID

  5724J0850

Applicable component levels

• R610 PSY

     UP