Some third party Java JDK/JRE providers, such as Adpotopenjdk.com, provide not only classic JDK and JRE implementations (also known as Hotspot), but also Eclipse Open9J Java implementations. While the server Java Listener will start with either implementation, it has been found that some third party JDBC DBMS drivers do not work with some Adpotopenjdk.com Open9J implementations (Vertica and Snowflake JDBC Drivers, in particular, on Windows). If your site chooses to use an Open9J JVM implementation or other third party JVM provider and experiences JDBC DBMS problems, a classic Java (Hotspot) implementation from Oracle or Adpotopenjdk.com should be installed and tested to confirm that the server software and DBMS setup are not at issue (and to correct, if needed). If the Open9J Java implementation is still desired, the site should follow up with the Open9J JVM or DBMS provider as to why this combination fails.
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