Ryan Kane [http://community.jboss.org/people/ryanpkane] created the discussion "Re: Thread dump on Waiting for monitoring entry" To view the discussion, visit: http://community.jboss.org/message/560325#560325 -------------------------------------------------------------- Did you ever get a solution to this issue?  We're seeing a similar issue and we think it may be caused by our 64bit JVM.  We're seeing lots of blocked threads locked on HashTable, which just doesn't seem to make sense.  -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/560325#560325] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]