How to fix the Oracle error ORA-30686: no dispatcher accepted TCP/IP connection request?

In this post, you’ll learn more about the Oracle ErrorORA-30686: no dispatcher accepted TCP/IP connection request with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30686: no dispatcher accepted TCP/IP connection request

Reason for the Error ORA-30686: no dispatcher accepted TCP/IP connection request

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 protocol=tcp.

How to fix the Error ORA-30686: no dispatcher accepted TCP/IP connection request ?

You can fix this error in Oracle by following the below steps

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.