ERROR: TNS-00584: Valid node checking configuration error
This error occurs when there is an invalid or unreachable hostname in the TCP.INVITED_NODES list in the “sqlnet.ora” file (/home/oracle/OraHome11g/network/admin/sqlnet.ora).
To fix this error:
- Check the nodes in the sqlnet.ora file to make sure they are all reachable; OR
- Comment out the TCP.VALIDNODE_CHECKING parameter in the “sqlnet.ora” file.