Architecture: Tivoli Access Manager for security

                   4 node load balanced Weblogic 10.3.0 cluster

                   Seam 2.2.0

                   RichFaces 3.3.1

After releasing our ajax heavy app to production we are noticing a behaviour where clients will use the app fine for 95% of the time, but then a random ajax request will just show the loading graphic on the client browser and spin for 5mins and then the request eventually comes back.

Examining the server logs we can see that the client request didnt actually hit the server until the end of the 5min wait and we serviced the request almost instantly.

Just shooting in the dark at the moment, but we do have the global queue enabled. Don't think this would have anything to do with it though.

<context-param>
   <param-name>org.richfaces.queue.global.enabled</param-name>
   <param-value>true</param-value>
</context-param>

And here is an example of a link which generated an ajax request we know took a long time to process:

<a:commandLink id="modelHistoryCancel" action="#{modelHistory.close()}" ajaxSingle="true" immediate="true" oncomplete="#{closeMe}" styleClass="sml-scndry-button" status="waitPanelStatus">

Here is a snapshot of the request we know took 5mins on the client side, but only 488ms to process on the server side.

Any suggestions appreciated.