Optimize Errors

We are getting following errors in optimize (7.1.1) error.log

(OPTIMIZE) [WmDistributedLockManager.JdbcDBLocks.JdbcLockDbManager.tooManyExclusiveLocks] 2010-10-26 08:50:40.69 EDT ERROR: Expected 1 lock for id(optimizee45104db-80e7-4f13-a3ee-cd4902a4d70b), found: 0

After a while, optimize service shuts down.

Do you see any other error apart from this… make sure that the Database connection which to use for optimize is up and running…