问题如上图：google一下：有文章描述如下：
ORA-03114 not connected to ORACLE
Cause: A call to Oracle was attempted when no connection was
established. Usually this happens because a user-written program has
not logged on. It may also happen if communication trouble causes a
disconnection.
释义：
ora-03114 : 没有连接到oracle。
原因：当连接没有建立的时候尝试调用Oracle。通常是适应用户编写程序的时候没有进行登陆操作造成的。当然，也有可能是因为网络连接问题导致的断开连接。
Action: Try again. If the message recurs and the program is user
written, check the program.
解决：再尝试一遍，如果错误信息再次出现并且程序是由用户编写的话，那么就检查一下你的代码是否有问题。
Common causes for the ORA-03114 error include:
Webserver or listener process is not running
Missing entry to the tnsnames.ora
Network issues
Problems with connection pooling (shared servers, MTS)
通常造成03114错误如下：
1 服务器或者是服务器监听器未运行
2 Missing entry to the tnsnames.ora
3 网络问题
4 连接池出现问题
总结一下：我的解决办法。。。。。重启啦！