ORA-03113: end-of-file on communication channel

ORA-03113: end-of-file on communication channel
　　
Cause: the communication ends abnormally, resulting in the termination of the communication channel.
　　
Solution: 1> check whether the server process is abnormal or not. You can learn from alert. log
　　
2>. Check whether the SQL * Net Driver is connected to the ORACLE executable program.
　　
3>. Check whether the server network is normal, for example, the network is disconnected or unstable.
　　
4>. check whether there are two nodes with the same name on the same network.
　　
5>. Check whether duplicate IP addresses exist on the same network.
　　
　　 The corresponding English is as follows:
　　
Cause: An unexpected end-of-file was processed on the communication channel. the problem cocould not be handled by the Net8, two task, software. this message cocould occur if the shadow two-task process associated with a Net8 connect has terminated abnormally, or if there is a physical failure of the interprocess communication hicle, that is, the network or server machine went down.
　　
Action: If this message occurs during a commection attempt, check the setup files for the appropriate Net8 driver and confirm Net8 software is correctly installed on the server. if the message occurs after a connection is well established, and the error is not due to a physical failure, check if a trace file was generated on the server at failure time. existence of a trace file may suggest an Oracle internal error that requires the balance of customer support.