I am encountering this issue as well.

Turning off textDocument/hover dynamicRegistration works around the issue

I investigated a bit, comparing eglot (where it works)/lsp-mode (where is does not) : The main difference I saw was that lsp-mode declares textDocument/hover with dynamicRegistration: true where as eglot sets it to nil.

Setting this in lsp-mode.el : `lsp--client-capabilities()' to t seems to fix the issue for me.

 (hover . ((contentFormat . ["markdown" "plaintext"])
               (dynamicRegistration . nil)))

Speculation for a durable fix.

My guess would be that with dynamic registration, lsp-mode is notified too late that the server supports hover.

lsp-mode seems to enable eldoc at startup only, when `lsp-managed-mode' is turned on.

(when (lsp-feature? "textDocument/hover")
      (add-hook 'eldoc-documentation-functions #'lsp-eldoc-function nil t)
      (eldoc-mode 1))

With dynamic registration, I guess it would have to be turned on when receiving the message instead of at startup time ?

@yyoncho , would you have some advice on how to proceed with this ?

from lsp-java.

I appreciate the workaround. I edited the file in my melpa directory and byte-compiled it again. Works well.

I forgot to include which version of jdtls I'm on - right now it's 1.37.0. I don't know which version I had when it was working. Did the behavior change from a previous version of jdtls?

from lsp-java.