I'm working on setting up a new CommandBox-based prod server for a client and I'd like to have them just use the CommandBox feature to manage their java installation, which uses the Eclipse Temurin builds of OpenJDK. This client has a support contract with Adobe in case anything goes wrong with their servers. Does anyone know if it is an issue to use OpenJDK on your servers and get support? In other words, does Adobe require you use the Oracle Java builds specifically, or will they support any version? I don't want to cause them any headaches down the road getting support.

You are talking about running the Adobe CF install from CommandBox using Temurin? I would think in general it would be a non-issue unless there was a bug that exists in Temurin that doesn't exist in the Oracle version. I could imagine a scenerio where there is a legit ACF bug that your client reports and Adobe responds with "you are not using Oracle JDK, therefore it must be a Java bug", but it is easy enough to switch Java instances. You would need confirmation from someone at Adobe tho to know for sure.

Right, that's what I'm trying to figure out. I use ACF locally on OpenJDK all the time for testing with no issue. But if Adobe will refuse support on it, that will be deal breaker.

I agree, and I typically run OpenJDK too w/o issue, but I am not relying on Adobe support on my local either

In a support ticket regarding a bug I mentioned testing with Corretto just to see if that changed the behaviour compared to the Oracle JDK we were using. It didn't, but the response was "Amazon Corretto is not tested and verified with CF. Please use the Oracle JDK as per the matrix"

We use Temurin at work with our ACF installs and working with their support on issues has not been a problem thus far.