Oracle : Ошибка ORA-06707

"TLI Driver: connection failed"
*Cause: TLI failed to establish the connection to a SQL*Net TCP/IP server
due to an error encountered by the remote server, which has
supplied a string describing the remote error.
*Action: See the SQL*Net TCP/IP User's Guide section "orasrv Messages" for
the specific cause and action.

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