错误提示好象说是死锁的原因!ORA-04020 deadlock detected while trying to lock object stringstringstringstringstringCause: While trying to lock a library object, a deadlock is detected.Action: Retry the operation later.
可以先查一下V$LOCKED_OBJECT看哪些SESSION锁了哪些表,不是查死锁,是查锁。 然后用ALTER SYSTEM KILL SESSION杀了
然后用ALTER SYSTEM KILL SESSION杀了
解决不了就是你application的问题了,看trace文件信息吧