SEZ9 commented on issue #12267:
URL: https://github.com/apache/seatunnel/issues/12267#issuecomment-5673952742

   Thanks for the complete log. With the latest run, the earlier 
`ClassNotFoundException` is no longer the terminal failure: the connector 
reaches the catalog connection using the `jdbc:postgresql://...` URL and then 
stops during JDBC authentication with `org.postgresql.util.PSQLException` 
reporting unsupported authentication type `13`. No snapshot reader, replication 
slot, publication, or WAL decoding has started at that point, so this is still 
a pre-CDC connectivity problem rather than a CDC defect.
   
   The Postgres-CDC connector uses `org.postgresql.Driver`, so placing 
`HgdbJdbc-6.2.5.jar` beside a PostgreSQL JDBC jar does not make this path use 
the HighGo driver, and mixing the two drivers is not a supported compatibility 
fix.
   
   To narrow this down, could you share (with credentials masked): the HighGo 
server version and the authentication method configured for this user, the 
exact PostgreSQL JDBC driver version on the classpath, and whether a standalone 
connection with the same `jdbc:postgresql` URL and credentials succeeds outside 
SeaTunnel? Please don't change replication ports or CDC settings based on this 
authentication failure.
   
   If the server requires a HighGo-specific authentication protocol that the 
standard PostgreSQL driver cannot implement, a link to public protocol and 
driver documentation would let us evaluate that as a separate compatibility 
proposal.
   
   <!-- streview-comment:1058 -->


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