A fix is available
APAR status
Closed as program error.
Error description
Optimize Topic security checks during message processing. Messag processing for publishing and subscribing messages when bus security is on is taking a lot of time. This is because each and every time, when a message is being published or subscribed, we are checking the authorization for the User.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server * **************************************************************** * PROBLEM DESCRIPTION: When bus security is enabled and the * * messages are published or subscribed * * from a topicspace, before each * * message gets processed, security * * check happens to check if the user is * * valid or not. This is impacting the * * rate at which the message is * * published or subscribed from the * * topicspace when bus security is * * enabled. * **************************************************************** * RECOMMENDATION: * **************************************************************** Stack products need the ability to cache the users such that SIBus will not verify the user authentication and authority before each publish or subscribe call for the same user. The security checks will happen again once a user is removed from the cache after a timeout has occured. The caching mechanism is controlled by a custom property set at the bus level. The custom property "sib.security.userCacheTimeout" defines the timeout value of the cache and also is responsible for enabling or disabling the feature. This custom property can vary between 1 to 100 seconds. The main reason for introducing the caching feature is to improve the performance for the rate at which messages gets published or subscribed when security is enabled.
Problem conclusion
A caching mechanism is introduced in SIBus to avoid the number of security checks happening at the time of publish or subscribe to improve the overall performance. The fix for this APAR is currently targeted for inclusion in fix packs 8.5.0.2. 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
PM75837
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-10-25
Closed date
2013-03-22
Last modified date
2013-03-22
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
WEBS APP SERV N
Fixed component ID
5724H8800
Applicable component levels
R700 PSY
UP
R800 PSY
UP
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
02 November 2021