Resolution:

The "java.io.IOException: Pipe Closed" occurs in the iiop connector if a page request has been canceled by the user before the page is done loading. This is typical for instance when a user is visiting a JSP for the first time and before the JSP is done compiling and returning to the browser (which can take a while the first time a JSP page is loaded) the user navigates to another page or closes the browser.

The exception is non-fatal and can be ignored.