Java Bean scope when used with the JPDK

Portal 3.0.9.8.4 and Jserv
When using JSPs with Java Beans and the JPDK I have noticed problems when setting the scope attribute of the useBean action to something other than "page". For example, <jsp:useBean id="provider" scope="session" class="MyClass" /> causes a java.lang.ClassCastException when there are more than two JSP portlets than attempt to access the ProviderSession object.
Does anyone know what value the JSP scope should be set to when you want the JSPs read/write to the ProviderSession?

The behavior you report is an expected one as your keys of objects on session are not unique to the two portlet instances. Two portlets with the same session object (may have been deployed on the same Portal page), are sharing the same object put on session, thus resulting in thread conflicts. What you need to do is to generate unique keys for objects stored for each portlet instance.
For example, instead of having the id as "provider", you should have it as <portlet instance name> + "provider".
You are not experiencing the same behavior in "request" or "page" scope, as in these scopes, the objects are not shared across portlet instances.
Please let me know if my interpretation of your issue is wrong.
Regards,
Abhinav

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