Difference between sample/postgres_jdbc and native PostgreSQL connector

[surister]

About You: Name: Ivan Company: Crate.io

Your question: Would you guys happen to know the key differences between: https://github.com/tableau/connector-plugin-sdk/tree/master/samples/plugins/postgres_jdbc and the native PostgreSQL connector?

My problem is that, for the CrateDB connector (which is postgres compatible), when running a simple join in Tableau desktop on two tables, it hangs until it gets:

Unexpected Error
The JDBC driver host process failed to respond.
Error Code: DACBE23F

But the exact same thing works fine with the native PostgreSQL connector, I tried just using samples/plugins/postgres_jdbc and it also hangs and gets the error.

Any help would be appreciated on how to debug this, thank you in advance!