Handling Exceptions in Action and Event Requests in JBoss Portal

According to the Portlets 2.0 specif a portlet throws an exception in the processAction or processEvent method, all operations on the ActionResponse must be ignored including set events [e.g setRenderParameter]. The 5 portal/portlet-container should continue processing the other portlets visible in the portal page.

It also says that it is up to the portlet container implementation if the error is faced to the end user, the portlet is removed from the current request cycle or if the render method of the portlet is called.

In JBoss Portal, the responses are cleared and the render methods are called.

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