"TNS-12597: TNS：连接描述符已在使用中"问题如何解决

Error: ORA-12597 / TNS-12597
Text: TNS:connect descriptor already in useCause: Internal error - illegal use of connect descriptor.
Action: Not normally visible to the user. For further details, turn on tracing and reexecute the operation. If error persists, contact Oracle Customer Support. 上面是Oracle MetaLink上的文档，建议你打开跟踪并重新执行那个操作，如果问题仍然存在，请联系Oracle的客户支持。