Cause
The database writer process died
The database writer process died
Warm start instance
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/2258600
https://community.oracle.com/message/3288853
https://community.oracle.com/message/1321375
https://community.oracle.com/message/2258595
https://community.oracle.com/message/9426270
https://community.oracle.com/message/2376995
https://community.oracle.com/message/10343165
https://community.oracle.com/message/4424412
https://community.oracle.com/message/3134678
https://community.oracle.com/message/10603222
https://community.oracle.com/message/594609
https://community.oracle.com/message/4206031
https://community.oracle.com/message/3813352
https://community.oracle.com/message/4345233
https://community.oracle.com/message/3813563
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