Extproc process locking TCP port which prevents Listener start up

(Doc ID 2348621.1)

Last updated on JANUARY 14, 2018

Applies to:

Oracle Net Services - Version 12.1.0.2 and later
Information in this document applies to any platform.

Symptoms

The TNS Listener service was not starting up as another service / process (extproc) was not releasing the port 1521 at OS level.
However, the extproc address in the listener and tnsnames shows IPC is being used.

After killing the ExtProc processes from the task manager the listener was able to start.


Cause

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