This bug has been copied from bug #566467 and has been proposed to be backported to 5.4 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: When openais was stopped, in some rare occasions it would freeze because of the use of non-async-signal-safe code inside a signal handler. With this update, openais no longer hangs and works as expected.
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-2010-0600.html