Salesforcedx-vscode: LWC and Aura Language Servers crash 5x on start

[mtetlow]

Summary

I was happily developing away, then got an exception ( https://github.com/babel/babel/issues/8689 ), I tried upgrading sfdx to latest, I found a duplicate import statement in a lwc which seemed to resolve the error, but now I am just getting these crashes right when I open vscode for a project.

Is there any way to look at some logs to see what is causing the Aura and LWC language servers to crash?

Steps To Reproduce:

1. Can't reproduce in a simple project. In my case I just get this error whenever I open the project in vscode:
   

Expected result

LWC and Aura Language servers start

Actual result

LWC and Aura Language servers crash 5x then stop on open

Additional information

_Feel free to attach a screenshot_.

VS Code Version:
Version 1.33.1 (1.33.1)
SFDX CLI Version:
sfdx-cli/7.3.0-94ecf2d5ee darwin-x64 node-v10.15.3
OS and version:
macOS Mojave 10.14.1

[mtetlow]

I tried a simplified reproduction in a new minimal project and came up with nothing.

I also deleted the .sfdx/typings dir and still had the error

[mtetlow]

any tips on debugging this? LWC dev is a lot slower without the language server :)

[lcampos]

I haven't been able to replicate this on my side. I've seen similar behavior with other language servers where they basically exit without properly closing the port they were using and then when you try to restart it the port is blocked/under use.

You mentioned you tried having a small repro project but are not running into that issue. Do you still run into this when switching back to the first project you were working on ?

If you haven't, you could try restarting your machine and see if that unblocks you from running into that issue. That would at least discard that it's an issue with the port being used by another process.

[no-response[bot]]

This issue has been automatically closed because there has been no response to our request for more information from the original author. Currently, there is not enough information provided for us to take action. Please reply and reopen this issue if you need additional assistance.

[Szandor72]

Hey @lcampos,

for unforeseen reasons I am now temporarily on a mac which throws the error on lwc/aura language servers crashing.

Which details do I need to provide in order for you to tackle this easier?

mojave, 10.14.4 (18E227)
sfdx-cli/7.6.0-28071a499b darwin-x64 node-v10.15.3

[lcampos]

Hi @Szandor72 what version of the extensions are you on ? Is there anything particular about the project's shape or the components you're working on ?

In case you have a project you can share with us, that would help us debug the issue and work on a fix. We've unfortunately haven't been able to replicate it on our side.

[jjTorrent]

I am also experiencing this issue with both Aura and LWC language servers.

Mac OS Mojave, 10.14.5 (18F132)
sfdx-cli/7.8.1-8f830784cc darwin-x64 node-v10.15.3
VS Code, Version 1.34.0 (1.34.0)
Extensions, version 45.15.1

[stephenwillcock]

I am also seeing the same problem with both Aura and LWC language servers, on trivial projects.

Mac OS Mojave, 10.14.5
VS Code Version 1.34.0
sfdx-cli/7.8.1-8f830784cc darwin-x64 node-v10.15.3
LWC/Aura extensions version 45.15.1

I seem to be able to work around the issue by downgrading the LWC/Aura extensions to 45.12.0

[nrkruk]

@stephenwillcock @jjTorrent @Szandor72 could one of you provide the url for a specific github repository you can reproduce this issue on? That would help me track down exactly what is happening

[jjTorrent]

@nrkruk
DevHubTest

[stephenwillcock]

For me this occurs immediately after creating a new SFDX project

[jjTorrent]

@stephenwillcock
Same here. Actually, it's with _all_ projects, for me.

[mtetlow]

@lcampos @nrkruk can you add any details on how we can generate a useful debug log when this occurs? This may get us closer to resolving it.

[Postem1]

Try to download/update your _python_ extension. Might be a good idea to also look at other dependencies.

[jjTorrent]

@Postem1
Not sure what you mean. I don't have a Python extension installed in VS Code. Can you clarify?

EDIT: I do have Python installed on my machine... it comes preinstalled on every Mac. I went ahead and updated Python and installed Python3. No change in VS Code's behavior.

[Postem1]

@jjTorrent
I was referring to the Python extension (created by Microsoft) in VS Code.
Try downloading it and see if that helps. It is a dependency for the Salesforce pack.

[jjTorrent]

@Postem1
I wasn't aware of that. If it's a dependency, then why isn't it installed alongside the other dependent extensions for SF? Curious. Anyway, I'll give it a shot!

[jjTorrent]

@Postem1
No change. The language servers continue to crash after installing the Python extension for VS Code created by Microsoft.

[lcampos]

@jjTorrent @Postem1 the Salesforce extensions do not depend on any python extension. We are still looking into this and will update this thread once we have a fix ready. Sorry for the trouble this is currently causing.

[NightBijou]

Hi guys, same problem over here: I was getting the two errors "The Aura Language Server server crashed 5 times in the last 3 minutes. The server will not be restarted." and "The LWC Language Server server crashed 5 times in the last 3 minutes. The server will not be restarted." after opening a Salesforce DX project in Visual Studio Code. I did not have these problems from the start but I don't remember when they first showed up. After some trial and error, I found the culprit on my system, maybe this information can be helpful for others.

Windows 10 Build Enterprise Version 1803, Visual Studio Code 1.35.1, Salesforce Extension Pack 45.15.1 - May 17, 2019.

After removing "C:\Program Files (x86)\nodejs\" from my system path, the problem went away. This turned out to be a rather old version of nodejs, the command "npm version" gave me npm: '2.11.3' among other things. I think this installation came with Visual Studio (the real Visual Studio), which is also installed on my system. I am currently using version 2017. I then upgraded that installation by running an msi installer downloaded from https://nodejs.org/en/download/, added nodejs back to my system path, and it works now. The command "npm version" now returns npm: '6.9.0'. Hope this helps.

[sthornley]

@NightBijou's solution has fixed the errors on my system. Thanks!

[stephenwillcock]

Likewise - installing Node 10.16.0 (NPM 5.4.1 to 6.9.0) fixed it for me
Thanks @NightBijou !

[jjTorrent]

Yes!!! I also updated npm via Terminal:
npm install npm@latest -g

Working now!

[nrkruk]

PR is up with a fix - big thanks to @NightBijou for the useful info- helped me track down and reproduce the issue. This should be resolved in tomorrow's release of the plugins.

[NightBijou]

Hey everyone, I'm glad to see that the problem could be solved. @nrkruk Thanks for your quick response. This tool set is important to us, keep up the good work, I'm looking forward to seeing more cool stuff from you guys in the future.

[nrkruk]

Issue is now resolved in v46.1.0 of the extensions

[domonique-ncino]

I still get this error.