I've encountered issues with lsp-jedi apparently sending a bad message to jedi-language-server which causes an Invalid Params error in Pythons pygls.
Having sought assistance from the author(s) of jedi-language-server[1] who suggested it might be an error in lsp-jedi[2] who suggested it was an error in the former I asked the authors of pygls[3] who suggested its a poorly formed command.
I'm stumped as to how to go about finding the call being made from Emacs though and would be grateful of advice.
I load lsp-jedi with...
(use-package lsp-jedi
:ensure t
:config
(with-eval-after-load "lsp-mode"
(add-to-list 'lsp-disabled-clients 'pyls)
(add-to-list 'lsp-enabled-clients 'jedi)))
But none of the commands defined in lsp-jedi are then available such as lsp-jedi-debug and so adding (setq lsp-jedi-debug t) to the above :config didn't help.
I tried starting emacs --debug or emacs --debug-init and then opening a .py file but nothing pertaining to lsp-mode was shown in the *Backtrace* buffer.
Setting toggle-debug-on-error t didn't help since the error occurs external to Emacs after lsp-jedi has sent its commands to jedi-language-server.
The error that occurs is...
Server jedi:12920/starting exited with status exit(check corresponding stderr buffer for details). Do you want to restart it? (y or n)
...and it never starts. In *jedi::stderr* the following error is shown...
Process jedi stderr finished
Traceback (most recent call last):
File "/home/neil/.virtualenvs/default/lib/python3.9/site-packages/pygls/protocol.py", line 152, in deserialize_message
deserialize_params(data, get_params_type)
File "/home/neil/.virtualenvs/default/lib/python3.9/site-packages/pygls/protocol.py", line 138, in deserialize_params
data['params'] = params_type(**params)
File "pydantic/main.py", line 406, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 1 validation error for InitializeParams
processId
value is not a valid integer (type=type_error.integer)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/neil/.virtualenvs/default/bin/jedi-language-server", line 8, in <module>
sys.exit(cli())
File "/home/neil/.virtualenvs/default/lib/python3.9/site-packages/jedi_language_server/cli.py", line 125, in cli
SERVER.start_io()
File "/home/neil/.virtualenvs/default/lib/python3.9/site-packages/pygls/server.py", line 204, in start_io
self.loop.run_until_complete(
File "/usr/lib/python3.9/asyncio/base_events.py", line 647, in run_until_complete
return future.result()
File "/home/neil/.virtualenvs/default/lib/python3.9/site-packages/pygls/server.py", line 75, in aio_readline
proxy(b''.join(message))
File "/home/neil/.virtualenvs/default/lib/python3.9/site-packages/pygls/protocol.py", line 456, in data_received
json.loads(body.decode(self.CHARSET),
File "/usr/lib/python3.9/json/__init__.py", line 359, in loads
return cls(**kw).decode(s)
File "/usr/lib/python3.9/json/decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python3.9/json/decoder.py", line 353, in raw_decode
obj, end = self.scan_once(s, idx)
File "/home/neil/.virtualenvs/default/lib/python3.9/site-packages/pygls/protocol.py", line 154, in deserialize_message
raise JsonRpcInvalidParams()
pygls.exceptions.JsonRpcInvalidParams: Invalid Params
*lsp-log* shows
Command "jedi-language-server" is present on the path.
Command "pyls" is not present on the path.
Command "pylsp" is not present on the path.
Command "jedi-language-server" is present on the path.
Command "pyls" is not present on the path.
Command "pylsp" is not present on the path.
Found the following clients for /home/neil/work/python/tcx2gpx/setup.py: (server-id jedi, priority -1)
The following clients were selected based on priority: (server-id jedi, priority -1)
The most frustrating thing is I use the same configuration home and work servers but this only occurs on my home server.
Any pointers on how to find out what lsp-jedi is requesting so I can investigate, as per the authors of pygls suggestion[3], whether its a malformed request or something on the server side would be very much appreciated.
