Oracle : Ошибка ORA-16664

16664, 0000, "unable to receive the result from a database"
*Cause: During execution of a command, a database in the Data Guard
broker configuration failed to return a result.
*Action: Check Data Guard broker logs for the details of the failure.
Ensure network communication is working properly amongst the
members of the configuration. Fix any possible network problems
and reissue the command.

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