Interoperating

WebSphere Application Server V6.1 is interoperable with other WebSphere Application Server versions under certain conditions.

See Overview of migration, coexistence, and interoperability and Premigration considerations.

WebSphere Application Server Version 6.1 is generally interoperable with WebSphere Application Server V5.x and V6.0.x. However, there are specific requirements to address for each version. In general, you should be at the most recent group PTF level to support interoperability.

Procedure

1. Follow the required guidelines for WebSphere Application Server V5.x.

   Guideline 1 (for V5.0.2 or earlier):

   To send requests from application servers that are WebSphere Application Server V5.0.2 or earlier to application servers that are V6.0 or later, set the following JVM properties:

   com.ibm.ejs.jts.jts.ControlSet.nativeOnly=false

   com.ibm.ejs.jts.jts.ControlSet.interoperabilityOnly=true

   Apply this guideline in addition to moving to V5.0.2.8.

   You do not need to set these properties to receive requests on application servers that are WebSphere Application Server V5.0.2 or earlier from application servers that are V6 or later.

   Guideline 2:

   Be aware of the level of WebSphere Application Server in which each function you use is supported. Applications that you intend to be interoperable must only use function that is supported by all levels of WebSphere Application Server in the cluster. For example, applications that use the commonj.timer.TimerManager resource, which was new in V6.0, should not be deployed to a cluster including both V5.1 and V6.1 servers.

   Guideline 3:

   If you run related cross-domain interoperating applications (one server is in rtp.raleigh.ibm.com and the other is in cn.ibm.com for example), you need to use fully qualified host names (host9.rtp.raleigh.ibm.com instead of just host9 for example) when installing WebSphere Application Server Version 6.1.

   Guideline 4:

   If you want to interoperate WebSphere Application Server V6.1 with V5.0, be at or above the V5.0.2.7 level. If you want to interoperate V6.1 with V5.1, be at or above the V5.1.1.1 level. Older levels of V5.0 and V5.1 do not support interoperability with V6.1.

2. Upgrade the Software Development Kit (SDK) used to one supported by V6.1.x.

   See Recommended fixes for WebSphere Application Server.

What to do next

This information is dynamic and might be augmented by information in technical articles that are available on the IBM DeveloperWorks WebSphere site. Check the site for the latest information.

Related Reference