Oracle : Ошибка ORA-30686

"no dispatcher accepted TCP/IP connection request"
*Cause: A connection had to be routed through a local socket
rather than a dispatcher. When this occurs, shared servers
are less beneficial because the session that owns the socket
cannot relinquish the process until the socket is closed. The
most likely cause is that no dispatcher is configured for
*Action: To improve the scalability of your configuration,
configure a dispatcher for protocol=tcp. To route these
particular connections through a particular set of dispatchers,
you can specify presentation=kgas. However, if you haven't done
so, any protocol=tcp dispatcher will be used.

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