文档解释
ORA-31659: status message was invalid type – detaching job
Cause: Message from the master process on the status queue had an invalid message type, indicating a failure in the protocol.
Action: Reattach and retry the operation. Contact Oracle Customer Support if the problem persists.
ORA-31659: status message was invalid type – detaching job 错误是由Oracle数据库在试图Detach一个处于active状态的外部作业时引发的，即，当前正在运行的作业尚未完成，因此你无法Detach它。
