In the driverlogs we get errors saying that our clusters can't connect to the hive metastore mysql database.
We're not planning to use the hive metastore, but these errors make it difficult to debug this issue as it results in a lot of error output, so we're trying to resolve it. I'll update once we have resolved these :). 

Sidenote, do you think this metastore connection issue could cause this JAR issue? If I don't install JARs/Maven libs, I can run code on my cluster just fine, even while still getting this metastore connection issue, so I didn't think much of it, as we're not planning to use the metastore.