Emacs, eglot and Java

A few days ago, I’ve tried to setup an Emacs environment for Java. I’ve got it working with eglot, the builtin LSP client and jdtls, the only proper language server there is for Java. While it works out of the box, there are a few issues:

• It looks like jdtls needs some special treatments as it comes with its own features and capabilities. For this reason, someone came up with eglot-java, a java extension for the eglot lsp client. It comes with a few utilities to create and run projects and tests but also the most important one for me: go-to-definition for builtin libraries and 3rd party packages.
• The connection to the language server isn’t stable at all and interrupts again and again. I tried to run eglot-reconnect without success. In this case, I always had to delete the cache in my emacs user directory. A very slow and painful experience. It looks like other people on the offical #emacs IRC channel have observed something similar so I’m not the only one. This has most probably to do with the quirks jdtls comes with and isn’t emacs fault.