This bug has been copied from bug #506152 and has been proposed to be backported to 4.8 z-stream (EUS).
http://git.fedorahosted.org/git/?p=cluster.git;a=commit;h=1ebe0d71a2cc822e3c805da33b815af3e3393ef0
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: nfsclient.sh used to leave temporary files in /tmp. This issue has been resolved and temporary files are now correctly removed when the client cache is disabled. (BZ#572632).
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-2010-0550.html