Sep 202012
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:

  1. Check the nodes in the sqlnet.ora file to make sure they are all reachable; OR
  2. Comment out the TCP.VALIDNODE_CHECKING parameter in the “sqlnet.ora” file.

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