Starting client failed: Error: spawn EBUSY

[radeksimko]

Originally posted by @TylerHaigh in #504 (comment)

Launching language server: c:\Users\tyler\.vscode\extensions\hashicorp.terraform-2.14.0\lsp\terraform-ls.exe serve
[Error - 9:11:30 AM] Starting client failed
Error: spawn EBUSY
	at ChildProcess.spawn (internal/child_process.js:403:11)
	at Object.spawn (child_process.js:562:9)
	at c:\Users\tyler\.vscode\extensions\hashicorp.terraform-2.14.0\node_modules\vscode-languageclient\lib\node\main.js:383:40

After a VSCode restart, it seems to start fine

[radeksimko]

@TylerHaigh I suspect this may be caused by the installation logic.

I know you said that it resolves after restart (presumably once LS is already installed). With that in mind - can you try to reproduce this by:

• stopping VS Code
• deleting the LS from c:\Users\tyler\.vscode\extensions\hashicorp.terraform-2.14.0\lsp\terraform-ls.exe
• starting VS Code and letting it re-install LS again

I will try to reproduce this myself in a Windows VM.

[TylerHaigh]

@radeksimko
Yep - seems to be related to installation

Followed instructions as follows:

1. Closed all VS Code windows
2. Deleted terraform-ls.exe from c:\Users\tyler\.vscode\extensions\hashicorp.terraform-2.14.0\lsp\
3. Started VS Code
4. Terraform extension installed Language server (I assume by installed it unzipped it from the available language servers under c:\Users\tyler\.vscode\extensions\hashicorp.terraform-2.14.0\lsp\ ) ( v0.19.1 and v0.20.1 )
5. VS Code reported error "Couldn't start client Terraform LS"
6. Output terminal displays the following

Launching language server: c:\Users\tyler\.vscode\extensions\hashicorp.terraform-2.14.0\lsp\terraform-ls.exe serve
[Error - 12:23:13 PM] Starting client failed
Error: spawn EBUSY
	at ChildProcess.spawn (internal/child_process.js:403:11)
	at Object.spawn (child_process.js:562:9)
	at c:\Users\tyler\.vscode\extensions\hashicorp.terraform-2.14.0\node_modules\vscode-languageclient\lib\node\main.js:383:40

After initial LS fails to start

1. Close VS Code
2. Re-open VS Code
3. Terraform Language server starts as expected

Launching language server: c:\Users\tyler\.vscode\extensions\hashicorp.terraform-2.14.0\lsp\terraform-ls.exe serve
2021/08/10 12:26:43 serve_command.go:150: Starting terraform-ls 0.20.1
2021/08/10 12:26:43 service.go:81: Preparing new session ...
2021/08/10 12:26:51 watcher.go:281: watching for changes ...
2021/08/10 12:26:51 langserver.go:94: Starting server (pid 29368; concurrency: 4) ...
2021/08/10 12:26:51 server.go:591: Received 1 new requests
2021/08/10 12:26:51 server.go:175: Processing 1 requests
2021/08/10 12:26:51 server.go:266: Checking request for "initialize": {"processId":38332,"clientInfo":{"name":"vscode","version":"1.59.0"},
...

[vboyk]

I had the same issue.
It appeared i had old version of NodeJS (10) installed on my PC, which doesn't handle this main.js script properly (something changed in child process spawn method).
I uninstalled NodeJS 10 and this solved my issue with Terraform LS extention.

[jpogran]

We believe we have resolved the issue with permissions to write files on installation in the linked PR and issue.

Since this has been open for a long time, I'm going to lock and close this issue now. This is not an indication we are ignoring the issue, but rather an attempt to gauge if there are any new occurrences and to gain new diagnostic information. Please do open a new issue if problems persist for you.