Cause
An ASM background process died.
An ASM background process died.
Warm start instance. Also check that ASM Instance is running.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/4492191
https://community.oracle.com/message/2482270
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