rejected promise not handled within 1 second: Error: Internal error. in extension.js?

[guw]

I am seeing the follow thing when setting up an integration test which includes the RedHat VS Code Java extension:

rejected promise not handled within 1 second: Error: Internal error.
extensionHostProcess.js:113
stack trace: Error: Internal error.
	at /Users/doe/.vscode/extensions/redhat.java-1.22.1-darwin-x64/dist/extension.js:2:1086579
	at ie (/Users/doe/.vscode/extensions/redhat.java-1.22.1-darwin-x64/dist/extension.js:2:1086873)
	at /Users/doe/.vscode/extensions/redhat.java-1.22.1-darwin-x64/dist/extension.js:2:1081657
	at Immediate.<anonymous> (/Users/doe/.vscode/extensions/redhat.java-1.22.1-darwin-x64/dist/extension.js:2:1081677)
	at process.processImmediate (node:internal/timers:476:21)
	at process.callbackTrampoline (node:internal/async_hooks:130:17)

Note, the error is legit, i.e. my extension is causing an issue and I am trying to write a test for it. However, I wonder if there is some code in extension.ts which needs an error handler to provide better logging?

[martypitt]

I'm hitting a similar problem, and wonder if you ever found a way to improve the logging around this? I suspect there's something in my code that's being a bad actor, but I can't track it down.

[martypitt]

Actually, with a little more debugging I was able to track it down:

In my example, I was getting the following error:

rejected promise not handled within 1 second: Error: Internal error.
extensionHostProcess.js:144
stack trace: Error: Internal error.
	at handleResponse (/home/martypitt/dev/taxi-lang/language-server/vscode-extension/node_modules/vscode-jsonrpc/lib/main.js:436:48)
	at processMessageQueue (/home/martypitt/dev/taxi-lang/language-server/vscode-extension/node_modules/vscode-jsonrpc/lib/main.js:263:17)
	at Immediate.<anonymous> (/home/martypitt/dev/taxi-lang/language-server/vscode-extension/node_modules/vscode-jsonrpc/lib/main.js:247:13)
	at process.processImmediate (node:internal/timers:476:21)
	at process.callbackTrampoline (node:internal/async_hooks:130:17)

Break pointing in node_modules/vscode-jsonrpc/lib/main.js:436:48 gave the full error, which turned out to be an exception my kotlin code was throwing in error.data:

It would be great if this was logged in the reject message - but leaving this here to help any future internet travellers.