A foreground process needing service from a background process has discovered the process died.
Consult the error code, and the trace file for the process.
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Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/4481766
https://community.oracle.com/message/9874962
https://community.oracle.com/message/4286906
https://community.oracle.com/message/3594768
https://community.oracle.com/message/3594767
https://community.oracle.com/message/1075683
https://community.oracle.com/message/10550991
https://community.oracle.com/message/2191093
https://community.oracle.com/message/33736
https://community.oracle.com/message/10002093
https://community.oracle.com/message/2274048
https://community.oracle.com/message/4505078
https://community.oracle.com/message/8184074
https://community.oracle.com/message/9492777
https://community.oracle.com/message/2550585