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Error: "Message could not be parsed" in Socket Mode [message #1852339]

Wed, 11 May 2022 09:29

Tom Martens

Messages: 5
Registered: May 2022

Junior Member

Hi,
I have an existing Xtext project and my goal is to create a VSCode Extension for it. To get somewhat familiar with the tools and the process I created the example Xtext project with eclipse and created the RunServer (similar to this: https://github.com/itemis/xtext-languageserver-example/blob/master/vscode-extension/src/extension.ts) to run the language server in socket mode and connected the VSCode extension also via socket - and it works fine.
Now I use the same code to run the Server in socket mode for the other existing project. However, when I start the VSCode extension I get this error in VSCode: "Message could not be parsed.". To verify that the xtext project is ok I used the ServerLauncher and the Generic Texteditor in eclipse and everything works fine.
Can anyone give me some hints how to address this problem?

Thanks!

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Re: Error: "Message could not be parsed" in Socket Mode [message #1852344 is a reply to message #1852339]

Wed, 11 May 2022 11:36

Christian Dietrich

Messages: 14353
Registered: July 2009

Senior Member

did you check the mssages?
did you check vscode-languageclient and lsp4j / xtext versions if they match?

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Re: Error: "Message could not be parsed" in Socket Mode [message #1852349 is a reply to message #1852344]

Wed, 11 May 2022 13:21

Tom Martens

Messages: 5
Registered: May 2022

Junior Member

Sorry, Im not sure where I can see the messages. Can you please tell me which file/function is responsible for that or which file I should debug?
Xtext ist version 2.25 and vscode-languageclient is 7.0.0, so as far as I can see they should be compatible.

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Re: Error: "Message could not be parsed" in Socket Mode [message #1852359 is a reply to message #1852349]

Wed, 11 May 2022 15:35

Christian Dietrich

Messages: 14353
Registered: July 2009

Senior Member

you can do something like (pseudo code)

Injector injector = Guice.createInjector(new ServerModule());
LanguageServerImpl languageServer = injector.getInstance(LanguageServerImpl.class);
Function<MessageConsumer, MessageConsumer> wrapper = consumer -> {
MessageConsumer result = new MessageConsumer() {
public void consume(Message m) {
System.out.println(m);
consumer.consume(m);
}
};
return result;
};

bdesides that i assume you also can debug client side for the error

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Blog : https://www.dietrich-it.de

[Updated on: Wed, 11 May 2022 15:37]

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Re: Error: "Message could not be parsed" in Socket Mode [message #1852360 is a reply to message #1852359]

Wed, 11 May 2022 15:40

Christian Dietrich

Messages: 14353
Registered: July 2009

Senior Member

and
Quote:

Xtext ist version 2.25 and vscode-languageclient is 7.0.0, so as far as I can see they should be compatible.

is wrong
https://www.eclipse.org/Xtext/releasenotes.html#/releasenotes/2022/02/28/version-2-26-0
https://github.com/Microsoft/vscode-languageserver-node

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

[Updated on: Wed, 11 May 2022 15:54]

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Re: Error: "Message could not be parsed" in Socket Mode [message #1852362 is a reply to message #1852360]

Wed, 11 May 2022 18:34

Tom Martens

Messages: 5
Registered: May 2022

Junior Member

You are correct, thank you for pointing this out! After downgrading the vscode-languageclient it works fine. Thanks!

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