Exception on "class extends XXX" autocompletion

[gian1200]

Got the following error when trying to get suggestions for classes to extend.

jun. 28, 2023 10:51:21 A.�M. org.eclipse.lsp4j.jsonrpc.RemoteEndpoint fallbackResponseError
SEVERE: Internal error: java.lang.reflect.InvocationTargetException
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:67)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:120)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:261)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:190)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:65)
	... 11 more
Caused by: java.lang.NullPointerException: Cannot invoke "org.eclipse.lsp4mp.services.properties.CompletionData.getUri()" because the return value of "org.eclipse.lsp4mp.services.properties.CompletionData.getCompletionData(org.eclipse.lsp4j.CompletionItem)" is null
	at org.eclipse.lsp4mp.ls.MicroProfileTextDocumentService.resolveCompletionItem(MicroProfileTextDocumentService.java:156)
	... 15 more

[Error - 10:51:21 AM] Request completionItem/resolve failed.
  Message: Internal error.
  Code: -32603 
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:67)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:120)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:261)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:190)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
	at jdk.internal.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:65)
	... 11 more
Caused by: java.lang.NullPointerException: Cannot invoke "org.eclipse.lsp4mp.services.properties.CompletionData.getUri()" because the return value of "org.eclipse.lsp4mp.services.properties.CompletionData.getCompletionData(org.eclipse.lsp4j.CompletionItem)" is null
	at org.eclipse.lsp4mp.ls.MicroProfileTextDocumentService.resolveCompletionItem(MicroProfileTextDocumentService.java:156)
	... 15 more

Additional information:

• OS: Windows 11 Enterprise, 22H2
• VSCode version: 1.79.2
• Tools for MicroProfile version: 0.8.0

[angelozerr]

@datho7561 have you some idea about this problem?

[datho7561]

This seems to be similar to eclipse/lsp4mp#402. I think it's probably the same root cause. The completion item should not appear at all.

As for why completion resolve is failing, I don't know.

[angelozerr]

@datho7561 if you have an empty class and you open completion, rest_class appears which is correct andyou have the same error popup.

LSP4MP consider that all completions items contains a data at https://github.com/eclipse/lsp4mp/blob/64c176df2c53eb4a8059ea40dfeecae134c603bb/microprofile.ls/org.eclipse.lsp4mp.ls/src/main/java/org/eclipse/lsp4mp/ls/MicroProfileTextDocumentService.java#L156 which is wrong for snippet.

We need to check that here. Are you ok with that? Do you think you could have time to fix it. It is a really annoying bug.

[datho7561]

Okay, I can take a look into it

[angelozerr]

Thanks @datho7561 !

[datho7561]

Hey @JessicaJHee if you comment on this issue, I can assign you, to reflect that you contributed the fix

[JessicaJHee]

Worked on this issue

[angelozerr]

Fixed with eclipse/lsp4mp#412