Oracle Solution for Error ora-09979

ORA-09979: skxfqhsnd: Error Sending a message to another endpoint

What triggered the Error:

The process was unable to send a message to an existing endpoint.

What should we do to fix it:

Check that the other node(s) are part of the cluster and operating properly. Check the instance and processes on the other node(s). Correct the operating system error and retry the operation.