VS Code code completion

Apps & Services VS Code
1

Hello,

there are some old threads about code completion not working and I was wondering if this was still the case.

Yesterday I set up my VS Code with the openHAB extension so that I can see the Items and Things, and I can save rules via a Samba share. However the code completion is not working. Whenever I press Ctrl + Space, the log file in openHAB server’s /var/log/openhab/openhab.log says the following:

2023-07-29 08:49:44.101 [ERROR] [st.antlr.ContentAssistContextFactory] - java.lang.RuntimeException: java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.lang.NullPointerException
        at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:?]
        at java.util.concurrent.FutureTask.get(FutureTask.java:191) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.doCreateContexts(ContentAssistContextFactory.java:181) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.create(ContentAssistContextFactory.java:131) ~[?:?]
        at org.eclipse.xtext.ide.server.contentassist.ContentAssistService.createProposals(ContentAssistService.java:106) ~[?:?]
        at org.eclipse.xtext.ide.server.contentassist.ContentAssistService.createCompletionList(ContentAssistService.java:78) ~[?:?]
        at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$completion$23(LanguageServerImpl.java:580) ~[?:?]
        at org.eclipse.xtext.ide.server.WorkspaceManager.doRead(WorkspaceManager.java:458) ~[?:?]
        at org.eclipse.xtext.ide.server.LanguageServerImpl.completion(LanguageServerImpl.java:579) ~[?:?]
        at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$completion$22(LanguageServerImpl.java:565) ~[?:?]
        at org.eclipse.xtext.ide.server.concurrent.ReadRequest.lambda$doRun$0(ReadRequest.java:66) ~[?:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) ~[?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:246) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:237) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:232) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.AbstractContentAssistParser.getFollowElements(AbstractContentAssistParser.java:49) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.AbstractContentAssistParser.getFollowElements(AbstractContentAssistParser.java:27) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:264) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.handleLastCompleteNodeAsPartOfDatatypeNode(ContentAssistContextFactory.java:264) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory$1.call(ContentAssistContextFactory.java:149) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory$1.call(ContentAssistContextFactory.java:146) ~[?:?]
        ... 4 more
Caused by: java.lang.NullPointerException
        at java.util.Objects.requireNonNull(Objects.java:209) ~[?:?]
        at java.lang.Class.getMethod(Class.java:2219) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:169) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:242) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:237) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:232) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.AbstractContentAssistParser.getFollowElements(AbstractContentAssistParser.java:49) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.AbstractContentAssistParser.getFollowElements(AbstractContentAssistParser.java:27) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:264) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.handleLastCompleteNodeAsPartOfDatatypeNode(ContentAssistContextFactory.java:264) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory$1.call(ContentAssistContextFactory.java:149) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory$1.call(ContentAssistContextFactory.java:146) ~[?:?]
        ... 4 more
2023-07-29 08:49:44.103 [ERROR] [st.antlr.ContentAssistContextFactory] - java.lang.RuntimeException: java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.lang.NullPointerException
        at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:?]
        at java.util.concurrent.FutureTask.get(FutureTask.java:191) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.doCreateContexts(ContentAssistContextFactory.java:181) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.create(ContentAssistContextFactory.java:131) ~[?:?]
        at org.eclipse.xtext.ide.server.contentassist.ContentAssistService.createProposals(ContentAssistService.java:106) ~[?:?]
        at org.eclipse.xtext.ide.server.contentassist.ContentAssistService.createCompletionList(ContentAssistService.java:78) ~[?:?]
        at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$completion$23(LanguageServerImpl.java:580) ~[?:?]
        at org.eclipse.xtext.ide.server.WorkspaceManager.doRead(WorkspaceManager.java:458) ~[?:?]
        at org.eclipse.xtext.ide.server.LanguageServerImpl.completion(LanguageServerImpl.java:579) ~[?:?]
        at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$completion$22(LanguageServerImpl.java:565) ~[?:?]
        at org.eclipse.xtext.ide.server.concurrent.ReadRequest.lambda$doRun$0(ReadRequest.java:66) ~[?:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) ~[?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:246) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:237) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:232) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.AbstractContentAssistParser.getFollowElements(AbstractContentAssistParser.java:49) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.AbstractContentAssistParser.getFollowElements(AbstractContentAssistParser.java:27) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:264) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.createContextsForLastCompleteNode(ContentAssistContextFactory.java:299) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.handleLastCompleteNodeIsPartOfLookahead(ContentAssistContextFactory.java:220) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory$3.call(ContentAssistContextFactory.java:172) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory$3.call(ContentAssistContextFactory.java:169) ~[?:?]
        ... 4 more
Caused by: java.lang.NullPointerException
        at java.util.Objects.requireNonNull(Objects.java:209) ~[?:?]
        at java.lang.Class.getMethod(Class.java:2219) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:169) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:242) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:237) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:232) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.AbstractContentAssistParser.getFollowElements(AbstractContentAssistParser.java:49) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.AbstractContentAssistParser.getFollowElements(AbstractContentAssistParser.java:27) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.BaseContentAssistParser.getFollowElements(BaseContentAssistParser.java:264) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.createContextsForLastCompleteNode(ContentAssistContextFactory.java:299) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory.handleLastCompleteNodeIsPartOfLookahead(ContentAssistContextFactory.java:220) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory$3.call(ContentAssistContextFactory.java:172) ~[?:?]
        at org.eclipse.xtext.ide.editor.contentassist.antlr.ContentAssistContextFactory$3.call(ContentAssistContextFactory.java:169) ~[?:?]
        ... 4 more

I was using the openHAB 3.4, but because this was not working, I upgraded it to 4.0.0. Unfortunately there was no improvement.

Any ideas? Thanks!

2

Nothing has changed. The issue is with the VS Code extension, so updating the server won’t do anything.

3

OK, thanks for the info!

4

I see the same problem after fresh install for version 4.1
Are there any hints what to do?

5

Not a solution, since I don’t use code completion. Just a suggestion, instead of using samba share, use vscode over SSH. It’s so much better working through remote vscode than over samba.