This bug has been copied from bug #561226 and has been proposed to be backported to 5.5 z-stream (EUS).
Fix in lvm2-cluster-2.02.56-7.el5_5.1.
Fix verified in lvm2-cluster-2.02.56-7.el5_5.1. I ran 6 instances of the stress script (in comment #0 of bug 561226) for 15 min, on each of the three nodes in the cluster and never saw it hang.
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-2010-0432.html