APAR status
Closed as program error.
Error description
WebAppFilterManager is caching the FilterChainContents based on
URI, and since each URI is unique, the HashMap of URI to
FilterChainContent can grow without limit.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: WebSphere Application Server users of portal *
****************************************************************
* PROBLEM DESCRIPTION: Filter chain cache keeps growing if *
* all URIs are unique. It eats up *
* memory eventually. *
****************************************************************
* RECOMMENDATION: *
****************************************************************
Filter chain was implemented with hashmap. When URIs are
uniquely generated like those from portal, the cache keeps
growing and eventually causes OutOfMemoryException.
Problem conclusion
Utilize LRUCache to recycle least used entries to maintain
cache size within maximum number of elements.
The maximum number is set to 500 which is big enough for most
web applications whose URIs can be determined. For apps like
WebSphere Portal Server whose URIs are unique, the cache
size is considered acceptable even though the cache itself is
not useful.
Temporary fix
An interim fix has been created.
Comments
APAR information |
APAR number |
PQ81144 |
Reported component name |
WAS BASE 5.0 |
Reported component ID |
5630A3600 |
Reported release |
00W |
Status |
CLOSED PER |
PE |
NoPE |
HIPER |
NoHIPER |
Special Attention |
NoSpecatt |
Submitted date |
2003-11-19 |
Closed date |
2003-12-08 |
Last modified date |
2004-06-22 |
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Modules/Macros
Publications Referenced
Applicable component levels |
R003 PSY |
UP |
R00A PSY |
UP |
R00H PSY |
UP |
R00I PSY |
UP |
R00P PSY |
UP |
R00S PSY |
UP |
R00W PSY |
UP |
R103 PSY |
UP |
R10A PSY |
UP |
R10H PSY |
UP |
R10I PSY |
UP |
R10P PSY |
UP |
R10S PSY |
UP |
R10W PSY |
UP |
|