Failed to connect with build server

[gmenih]

I'm having some trouble getting nvim-metals to run properly on my M3 MacBook. I've had it running well on my Linux machine, and I'm using the exact same setup.

When I open a Scala file, I see this error: LSP[metals] Failed to connect with build server, no functionality will work. See logs for more details.

Looking at the .metals/metals.log, I can see a lot of errors where metals is trying to execute java on path /opt/homebrew/opt/openjdk@17/bin/bin/java. This is nothing like my JAVA_HOME path, which is set to /opt/homebrew/Cellar/openjdk/21.0.1/libexec/openjdk.jdk/Contents/Home/.

Somehow it built a completely wrong path with a /bin/bin/java, which doesn't exist (/bin/java does).

I'm not sure what I'm doing wrong at this point. I didn't have any issues setting this up on Linux, but I can't get it working correctly on macOS.

[ckipp01]

Hey @gmenih, that's odd that it's picking up the incorrect JAVA_HOME. It uses a few different mechanisms to find that, but if you have JAVA_HOME set it should for sure be grabbing that. One thing you can try is to actually set this directly in your config settings by setting javaHome. Then try opening again and ensuring that this works. Also do you know what version of Metals you're using? You should be able to do a :MetalsInfo and get this info.

[gmenih]

Okay, I figured out the issue. It looks like I did at some point have an incorrect JAVA_HOME set, which was then baked into ~/.bloop/bloop.json and metals was using that variable.

After deleting ~/.bloop, it is working correctly!