According to the thread dump, the treads are hanging waiting for replies from th database. If you can reproduce this issue on demand, just enable JDBC driver level debug and see what kind of statement / database action causes that long delay. Maybe some monitoring tools executed on DB level will show the similar results without enabling JDBC debug. Your database administrator will know what to do.
Edited by: user10481749 on Feb 19, 2010 12:17 AM