使用oracle的过程中，oracle自动关闭DB，发出ora-03114的错误。

这是oracle的信息：

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 happen if communication trouble causes a disconnection. In addition, this message could occur when ALTER SYSTEM KILL SESSION or ALTER SYSTEM DISCONNECT SESSION were issued with the IMMEDIATE qualifier because, in those cases, the client's connection to the database is terminated without waiting for the client to issue a request.

Action: Try again. If the message recurs and the program is user written, check the program.

解决方法是：

SQL> drop trigger sys.cdc_alter_ctable_before; 触发器已删除。 SQL> drop trigger sys.cdc_create_ctable_after; 触发器已删除。 SQL> drop trigger sys.cdc_create_ctable_before; 触发器已删除。 SQL> drop trigger sys.cdc_drop_ctable_before; 触发器已删除。 SQL> call sys.dbms_java.dropjava('-s rdbms/jlib/cdc.jar'); 调用完成。 SQL>