ORA-28040: No matching authentication protocol exception

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ORA-28040: No matching authentication protocol exception

Caused by: java.sql.SQLException: ORA-28040: No matching authentication protocol

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  • SQLNET.ALLOWED_LOGON_VERSION_SERVER in sqlnet.ora file to a lower Oracle version like 8 or 9 which are compatible with the client-server authentication when using unsupported JDBC drivers with Oracle DB 12c.
  • This parameter specifies the minimum authentication protocol that a client is allowed to use when connecting to Oracle Database instances.
  •  Upgrade your JDBC driver client to 11g or JDBC 12c.
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