"Remote end closed connection without response" on any command

[eranikid]

Hello.

I am trying to get OmnisharpVim working. I am completely new to it, and to vim in general, but I am trying my best. I have chosen to install Omnisharp server automatically, and it succesfully installed and started, as lsof -i shows me that process mono listens on port 36625. My .vimrcis the following:

call plug#begin('~/.vim/plugged')

Plug 'OmniSharp/omnisharp-vim'

call plug#end()

filetype plugin on

let g:OmniSharp_timeout = 5

set completeopt=longest,menuone,preview

set previewheight=5

augroup omnisharp_commands
    autocmd!

    autocmd CursorHold *.cs call OmniSharp#TypeLookupWithoutDocumentation()

    autocmd FileType cs nnoremap <buffer> gd :OmniSharpGotoDefinition<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>fi :OmniSharpFindImplementations<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>fs :OmniSharpFindSymbol<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>fu :OmniSharpFindUsages<CR>

    autocmd FileType cs nnoremap <buffer> <Leader>fm :OmniSharpFindMembers<CR>

    autocmd FileType cs nnoremap <buffer> <Leader>fx :OmniSharpFixUsings<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>tt :OmniSharpTypeLookup<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>dc :OmniSharpDocumentation<CR>
    autocmd FileType cs nnoremap <buffer> <C-\> :OmniSharpSignatureHelp<CR>
    autocmd FileType cs inoremap <buffer> <C-\> <C-o>:OmniSharpSignatureHelp<CR>


    autocmd FileType cs nnoremap <buffer> <C-k> :OmniSharpNavigateUp<CR>
    autocmd FileType cs nnoremap <buffer> <C-j> :OmniSharpNavigateDown<CR>
augroup END

nnoremap <Leader><Space> :OmniSharpGetCodeActions<CR>
xnoremap <Leader><Space> :call OmniSharp#GetCodeActions('visual')<CR>

nnoremap <Leader>nm :OmniSharpRename<CR>
nnoremap <F2> :OmniSharpRename<CR>
command! -nargs=1 Rename :call OmniSharp#RenameTo("<args>")

nnoremap <Leader>cf :OmniSharpCodeFormat<CR>

nnoremap <Leader>ss :OmniSharpStartServer<CR>
nnoremap <Leader>sp :OmniSharpStopServer<CR>

nnoremap <Leader>th :OmniSharpHighlightTypes<CR>

, which is essentially the config from OmnisharpVim main page, without SyntasticCheck with the config necessary to install OmnisharpVim plugin.

All the commands are autocompleted, so the plugin itself seems to have connected, however when trying to execute any command, the bottom status bar says CONNECTION: Remote end closed connection without response. Is there any chance that vim targets the wrong port or something?

:echo has('python3') || has('python') returns 1.
Vim version 8.0
Ubuntu 18.04.1 LTS

Please request any additional information if you need it.
Thanks in advance for any help!

[nickspoons]

Vim won't be listening on the wrong port, vim has assigned the port and started the server running on it. There are various things you can check but the first thing is to check you have the right server (the HTTP version) since this is what tends to be the problem when people get started with a manually installed server.

Why did you chose to manually install the server? Did you try letting vim install it?

Please include the output of launching your server from the command line like this:

$ /full/path/to/omnisharp/run -v -s /full/path/to/your.sln

[axvr]

I've had some issues using OmniSharp Roslyn v1.32.2 with omnisharp-vim, but I'm not sure if this is related to the problem you are having. I get the error message CONNECTION: '' whenever I try to do anything using v1.32.2, and when running the server manually everything seems to work fine, but omnisharp-vim still fails to connect to it.

You could try and install the previous version (this fixed the problems for me).

/path/to/omnisharp-vim/installer/omnisharp-manager.sh -Hv v1.32.1 -l "$HOME/.omnisharp/omnisharp-roslyn"

[daavidjobe]

What is the status on this issue? I´m experiencing this to and i have tried multiple versions of omnisharp.
At the bottom of my editor it prints: CONNECTION: remote end closed connection without response

thank you

[nickspoons]

@daavidjobe "tried multiple versions" doesn't give much information to debug.

Please try getting the latest version of OmniSharp-vim, and using it to install OmniSharp-roslyn by running the following from the vim command line:

:OmniSharpInstall 'v1.32.1'

Also, make sure that g:OmniSharp_server_path is not set in your .vimrc

[yjh0502]

I'm using Ubuntu 18.10 and my problem is fixed by downgrading omnisharp to v1.32.1. It might be helpful to let Linux users to use v1.32.1 by default, or mention it to README until it fixed.

[nickspoons]

@yjh0502 it is mentioned in the README

[nickspoons]

OK I've made OmniSharp-Roslyn v1.32.1 the default for :OmniSharpInstall with no arguments for Linux/Mac. As soon as the roslyn issue is resolved we can roll this change back and start installing the latest version again.

[adrianoviana87]

Hey, this should not be closed... forcing and older version of omnisharp http is not fixing. I need to use a higher version of omnisharp (cause 1.32.1 fails to load my project) but I happes that any higher version won't work with omnisharp-vim - the error message is the same as this issue.

[nickspoons]

@adrianoviana87 the issue is closed because we can't do anything about it here. The problem lies with OmniSharp-roslyn, and is being tracked there: OmniSharp/omnisharp-roslyn#1274