In one of our responses we set the "No-Cache" and "Pragma" headers so that the resulting JSP page is not cached. While on the subsequent page if the user hits the back button, the browser correctly responds with the "Web page expired" in IE 5.5 and "Data missing" in Netscape 4.6. However, if the user chooses to reload the document at this point we get the Websphere message: "Error 500: Websphere servlet cache was unable to find CacheProxyRequest in the request proxy chain". Has anyone run in to this and found out what causes this and a resolution. Any information would be appreciated!
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