[nicktelford]

We've been using OpenJDK in production since Java 7 without issue. Since Java 8, Oracle JDK has been built from OpenJDK with a couple of proprietary editions (Java Flight Recorder, SNMP support, different font rendering etc.).

In practice, none of the differences had any impact on our uses.

Since Java 11, Oracle JDK and OpenJDK are the same. Oracle JDK is just a build that's commercially supported by Oracle.

There's a ton of FUD around OpenJDK and has been for years. For a long time many Apache projects recommended Oracle JDK solely on the grounds that they hadn't been tested on OpenJDK by the maintainers.