The logs you sent do not show how GlobalTransaction::43 tries to acquire locks on /Parameters/ISchmParam/4686570, only how to first one succeeds. They seem incomplete. Is it possible for you to do the following: log this : CachePrinter.printCacheLockingInfo(c) immediately after suspending the first tx and immediately before committing the second one? Also, can I have the full jbosscache log (full meaning everything logged by org.jboss.cache in time frame before starting the first tx and after the second one successfully commits. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4209844#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...