混淆 Tomcat JDBC (tomcat-jdbc) Driver to Use

Question

TL;DR:

How do we know which version of the tomcat-jdbc driver we need to use for a specific version of Tomcat?

Is there any reasonable documentation?

Longer Version

Over the years I have looked for a reasonable explanation on which tomcat-jdbc driver to use with a specific version of Tomcat. But I just haven't been able to find anything that says "For this version of tomcat, use this version of tomcat-jdbc driver."

My gut feeling is that the tomcat-jdbc version should be the same version as the tomcat server we're running. Is that a true statement?

Meaning, if we're running tomcat 9.0.65 we should be using the tomcat-jdbc 9.0.65?

Are there any links out there that specifically explain what to do?

Any friendly direction would be greatly appreciated.

Answer 1

Come to find out after some friendly direction by @andrewJames, the tomcat-jdbc library is provided by the Tomcat instance itself.

We most likely had the tomcat-jdbc in our pom.xml because it stopped red-lines in our Spring xml configuration files with missing Class names and attributes.

The person that originally added the tomcat-jdbc library to our pom should have scoped the library as 'provided'.

Then after a bit more research into Connection Pools we decided to switch to HikariCP due to its small package size and speed improvements over tomcat-jdbc.