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TNSLSNR.EXE Suddenly Fails To Start, 'Failed to start service, error 0, TNS-12560 (Doc ID 437250.1)

Last updated on JANUARY 22, 2020

Applies to:

Oracle Net Services - Version to [Release 9.2 to 10.1]
z*OBSOLETE: Microsoft Windows Server 2003
Microsoft Windows (32-bit)


After stopping the TNS Listener it suddenly fails to restart.

Error reported when manually trying to start the TNS Listener from the MSDOS/Command window:

lsnrctl start>


Failed to start service. Error 0.
<< Process hangs at this point for several minutes.>>

Then returns:

TNS-12560 TNS: Protocol Adapter error

Other symptoms:

No updates are seen to the listener.log, nor is a listener.trc file generated after enabling TNS Listener tracing.

Listener fails to start with only IPC protocol address or if creating a new TNS Listener on a unique TCP port.


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