Fixes are available
PI53566:on demand router memory leak when upgrading applications under load
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21
APAR status
Closed as program error.
Error description
The On Demand Router (ODR) has a memory leak related to HttpRouteAction objects such that when the system is under load and there are configuration changes such as uninstalling and installing applications it is possible that multiple, redundant HttpRouteAction objects can be created with registered listeners for ODC tree changes but never removed. This will eventually fill up the available heap space and cause an Out Of Memory issue on the ODR. Restarting the ODR will correct the problem.
Local fix
Restart the ODR.
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server Intelligent Management using the * * java On Demand Router (ODR). * **************************************************************** * PROBLEM DESCRIPTION: An Out Of Memory error can be seen on * * the On Demand Router because * * HttpRouteAction objects can * * accumulate. * **************************************************************** * RECOMMENDATION: * **************************************************************** There is a code bug where HttpRouteAction objects can accumulate because they are not freed. This is particularly noticeable when there are routing rules present, many applications installed, and multiple configuration changes happening on the system (such as installing or removing applications). Over time this can cause exhaustion of the available heap and an Out Of Memory error for the On Demand Router.
Problem conclusion
The area of code was corrected to release the HttpRouteAction objects. This fix supercedes PI51978. The fix for this APAR is currently targeted for inclusion in fix pack 8.5.5.9. 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 number
PI53566
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-12-04
Closed date
2016-01-22
Last modified date
2016-03-23
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
WEBSPHERE APP S
Fixed component ID
5724J0800
Applicable component levels
R700 PSY
UP
R850 PSY
UP
Document Information
Modified date:
28 April 2022