Fixes are available
Java SDK 1.5 SR8 Cumulative Fix for WebSphere Application Server
Java SDK 1.5 SR8 Cumulative Fix for WebSphere Application Server
Java SDK 1.5 SR10 Cumulative Fix for WebSphere Application Server
6.1.0.31: Java SDK 1.5 SR11 FP1 Cumulative Fix for WebSphere Application Server
6.1.0.33: Java SDK 1.5 SR12 FP1 Cumulative Fix for WebSphere
6.1.0.29: Java SDK 1.5 SR11 Cumulative Fix for WebSphere Application Server
6.1.0.35: Java SDK 1.5 SR12 FP2 Cumulative Fix for WebSphere
6.1.0.37: Java SDK 1.5 SR12 FP3 Cumulative Fix for WebSphere
6.1.0.39: Java SDK 1.5 SR12 FP4 Cumulative Fix for WebSphere Application Server
6.1.0.41: Java SDK 1.5 SR12 FP5 Cumulative Fix for WebSphere Application Server
6.1.0.43: Java SDK 1.5 SR13 Cumulative Fix for WebSphere Application Server
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server
APAR status
Closed as program error.
Error description
Requests that cross between process within IHS will not have affinty honored as it does when staying within the same process.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: Users of IBM WebSphere Application Server * * versions 6.0.2 and 6.1 Plug-In with * * Memory-to-memory Session Management * * configured (High Availability Manager's * * Partition Table) to maintain session * * affinity between browsers and WebSphere * * Application Server * * * **************************************************************** * PROBLEM DESCRIPTION: The Plug-in could break an established * * session when a newly spawned web * * server process handles its first * * request. This is due to the fact that * * the new process does not have a * * stored partition at creation. * **************************************************************** * RECOMMENDATION: * * * **************************************************************** WebSphere Plug-in uses the default load balancing algorithm when a new webserver process handles an affinity request. Plug-in reports that the partition table is missing and hence uses round robin or random load balancing. This could potentially lead to loss of session if session data is not fully replicated over the cluster.
Problem conclusion
The plug-in has been enhanced to pre-fetch the partition table, so that affinity requests are maintained. A new custom property, GetDWLMTable, has been added to web servers which enables or disables the plug-in's ability to prefetch the Partition Table. To enable this feature, set GetDWLMTable=true, regenerate the plugin-cfg.xml for the web server and propagate. The default value is FALSE. This custom property is required only when Memory-to-Memory Session Management is configured on WebSphere Application Server. To add a custom property, please follow the steps below 1. In the administrative console, select Servers > Web Servers > Web_server_name > Plug-in properties > Custom properties > New 2. Under General Properties specify the name of the custom property in the Name field (GetDWLMTable) and a value for this property in the Value field (true or false). You can also specify a description of this property in the Description field. 3. Click Apply or OK. 4. Click Save to save your configuration changes. 5. Re-generate & propagate the plugin-cfg.xml. This fix is scheduled to be released in fix packs 6.0.2.23 and 6.1.0.13. 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
PK48101
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
60S
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2007-06-29
Closed date
2007-08-20
Last modified date
2007-10-24
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Modules/Macros
PLUGIN
Fix information
Fixed component name
WEBS APP SERV N
Fixed component ID
5724H8800
Applicable component levels
R60A PSY
UP
R60H PSY
UP
R60I PSY
UP
R60P PSY
UP
R60S PSY
UP
R60W PSY
UP
R60Z PSY
UP
R61A PSY
UP
R61H PSY
UP
R61I PSY
UP
R61P PSY
UP
R61S PSY
UP
R61W PSY
UP
R61Z PSY
UP
Document Information
Modified date:
29 December 2021