This bug has been copied from bug #620996 and has been proposed to be backported to 5.5 z-stream (EUS).
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Previously, when Tomcat was starting up, it failed to undeploy applications and returned a 'StackOverflowError' exception. This was caused by an infinite loop that eventually caused Tomcat to run out of memory. The infinite loop was a result of a faulty check that searched for directory traversal attempts in WAR archives. With this update, the undeploying of applications works as expected and no longer returns a stack overflow error.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2010-0744.html