Since Talend JDBC components start using new tcompv0 framework, we might get this error when using merge connector of tJDBCInput.
java.lang.RuntimeException: Missing output connection for component JDBC#Input
Scenario: using merge line to connect tJDBCInput with tUnite
Temp Workaround: add an intermediate component javajet between tDBInput and tUnite
Permanent solution: install R2023-11v2
URL: https://update.talend.com/Studio/8/updates/R2023-11v2/