Monday, April 4, 2016

TNS-12547: TNS:lost contact,Linux Error: 104: Connection reset by peer

TNS-12547: TNS:lost contact,Linux Error: 104: Connection reset by peer

Error:

TNS-12547: TNS:lost contact
TNS-12560: TNS:protocol adapter error
TNS-00517: Lost contact
Linux Error: 104: Connection reset by peer

Solution:

Make sure the loopback entry in /etc/hosts is not missing when you start the listener:
127.0.0.1 localhost.localdomain localhost
Now try to run lsnrctl start as oracle again.

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