文档解释
ORA-12554: TNS:current operation is still in progress
Cause: An internal operation is still in progress.
Action: Not normally visible to the user. For further details, turn on tracing and reexecute the operation. If error persists, contact Oracle Customer Support.
ORA-12554错误表明当前操作尚未完成。它普遍发生在使用net Configuration Assistant连接到数据库时，并且解释为连接目标实例（SID或服务名）的初始化进程正在运行，并且尚未完成。
