PQ99684: HIGH CPU USAGE WHEN USING THE PROCESS CHOREOGRAPHER PROVIDED WITH WBI-SF 5.1.1 IF THE APPLICATION SERVER IS IDLE

 Fixes are available

6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for AIX platforms
5.1.1.8: WebSphere Application Server 5.1.1 Cumulative Fix 8 for AIX
5.1.1.8: WebSphere Application Server 5.1.1 Cumulative Fix 8 for Windows
5.1.1.8: WebSphere Application Server 5.1.1 Cumulative Fix 8 for HP-UX
5.1.1.8: WebSphere Application Server 5.1.1 Cumulative Fix 8 for Solaris
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for HP-UX platforms
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for OS/400 platforms
5.1.1.6: WebSphere Application Server Version 5.1.1 Cumulative Fix 6
5.1.1.7: WebSphere Application Server Version 5.1.1 Cumulative Fix 7
5.1.1.4: WebSphere Application Server Version 5.1.1 Cumulative Fix 4
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for Solaris platforms
6.0.0.3: WebSphere Application Server V6.0.0 Fix Pack 3
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for Windows platforms
6.0.2: WebSphere Application Server V6.0 Refresh Pack 2 for Linux platforms
5.1.1.8: WebSphere Application Server 5.1.1 Cumulative Fix 8 for Linux
6.0.1.2: WebSphere Application Server Version 6.0.1 Fix Pack 2



APAR status
Closed as program error.

Error description
When using the Process Choreographer provided with WebSphere
Business Integration Server Foundation Version 5.1.1, the CPU
usage is quite high even when the application server is
sitting idle.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: This problem affects customers who use the   *
*                 Process Choreographer provided with          *
*                 WebSphere Business Integration Server        *
*                 Foundation (WBI-SF) Version 5.1.1, or the    *
*                 non-asf mode for the Java Message Service    *
*                 (JMS) functionality provided with WebSphere  *
*                 Application Server Version 5.1.x.            *
****************************************************************
* PROBLEM DESCRIPTION: When using the Process Choreographer    *
*                      provided with WebSphere Business        *
*                      Integration Server Foundation Version   *
*                      5.1.1, the CPU usage is quite high      *
*                      even when the application server is     *
*                      sitting idle.                           *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The Process Choreographer uses "non-ASF mode" message
listeners provided with WebSphere Application Server in order
to detect incoming messages. When using this mode, each
message listener will wait for a period of time for messages
to arrive (this time period is specified by the Message
Listener Service custom property "non.asf.receive.timeout").
If no message arrives in this time, the application server
will rollback any active transaction before waiting for a
new message. It is safe to do this as a new transaction is
created immediately before the listener waits for a
message - if a timeout occurs waiting for a message, then no
work has actually been done.

Unfortunately, rolling back an active transaction has quite
a large performance overhead.
Problem conclusion
Rather than rolling back the transaction, the fix simply
perfoms a commit, which is less performance intensive.

The fix for this APAR is currently targeted for inclusion
in Cumulative Fix 4 for WebSphere Application Server
Version 5.1.1 and Cumulative Fix 3 for WebSphere Application
Server Version 6.0.0. Please refer to the Recommended Updates
page for delivery dates:
  
http://www-1.ibm.com/support/
    docview.wss?rs=180&context=SSEQTP&uid=swg27004980
Temporary fix Comments
APAR information
APAR number PQ99684
Reported component name WAS BASE 5.0
Reported component ID 5630A3600
Reported release 10W
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2005-01-19
Closed date 2005-03-09
Last modified date 2005-03-09

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
MSGING          

Publications Referenced

Fix information

Applicable component levels
R003 PSN    UP
R00A PSN    UP
R00H PSN    UP
R00I PSN    UP
R00P PSN    UP
R00S PSN    UP
R00W PSN    UP
R103 PSY    UP
R10A PSY    UP
R10H PSY    UP
R10I PSY    UP
R10P PSY    UP
R10S PSY    UP
R10W PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 10W
Software edition:
Reference #: PQ99684
IBM Group: Software Group
Modified date: Mar 9, 2005