Is it configurable for lsp4e to disable printing info logs to the Error Log View

[jdneo]

I'm working on a language server integrated via lsp4e. And I found that the lsp4e will print a lot of info leveled logs into the Error Log View.

Is this behavior configurable per each server integration? Or it can only be configured globally?

[mickaelistria]

You can filter the messages with "information" severity out of the view, from the view menu.
But what I see here look more like debug traces, those should simply not be sent as messages by the language server. The LS log could/should ideally be a separate file; or the LS should be configurable in a way that by default, those are not emitted.

[iloveeclipse]

I've never used lsp4e API, so no idea who exactly initiates these INFO entries, but the plugin id reported is org.eclipse.lsp4e. Could it be, is this something that framework automatically does in some cases?

[rubenporras]

I am also not sure who initiates this INFO entries, @jdneo , could you paste some stacktrace for the messages? I think they should be available if you double-click any of the entries.

[jdneo]

Hi @rubenporras,

I double clicks couple of the entries, but none of them has stracktraces

[mickaelistria]

Those come from the language server explicitly sending a logMessage request or type info, which according to the LSP spec is exactly meant to be handled as an info message in the client log: https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#window_logMessage

[jdneo]

@mickaelistria Correct.

Unfortunately, the logMessage is marked as final:

lsp4e/org.eclipse.lsp4e/src/org/eclipse/lsp4e/LanguageClientImpl.java

Lines 107 to 109 in 61b3da3

	public final void logMessage(MessageParams message) {
	CompletableFuture.runAsync(() -> ServerMessageHandler.logMessage(wrapper, message));
	}

I cannot override it. Should I file an request for this?

[rubenporras]

Is this not something to configure in the language server? If you do not want those log messages, should you not configure the language server to not send them?

[jdneo]

Does LSP have such capability section that let client tell the server do not send logMessage notification? I didn't find it in the spec.

[jdneo]

Anyway, I think we should first answer the question: Is the non-error leveled logs supposed to be printed in the Eclipse Error Log View?

If the answer is yes, then nothing needs to be changed here.

If the answer is no, a quick fix is that lsp4e side prints the info-level logs to file instead of the Error Log.

Any idea? @mickaelistria @iloveeclipse @rubenporras