Saving rules file creates JAVA error in output log of Visual Studio Code

Setup, Configuration and Use Scripts & Rules
1

Hi,

I have an openhab3 server running on a raspi. I went through the whole setup of items, sitemap etc. and am now in the middle of setting up several rules to have my home automation work together.
Since a few days I receive an JAVA error in the output section of Visual Studio Code when saving the rules file.

Here is the error message I receive:

[Error - 10:40:26] Request textDocument/definition failed.
  Message: Internal error.
  Code: -32603 
java.util.concurrent.CompletionException: java.lang.RuntimeException: Cannot create a resource for 'java:/Objects/org.openhab.core.model.script.actions.BusEvent'; a registered resource factory is needed
	at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:331)
	at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:346)
	at java.base/java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:704)
	at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506)
	at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2088)
	at org.eclipse.xtext.ide.server.concurrent.AbstractRequest.logAndCompleteExceptionally(AbstractRequest.java:73)
	at org.eclipse.xtext.ide.server.concurrent.ReadRequest.lambda$doRun$0(ReadRequest.java:69)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.RuntimeException: Cannot create a resource for 'java:/Objects/org.openhab.core.model.script.actions.BusEvent'; a registered resource factory is needed
	at org.eclipse.xtext.resource.XtextResourceSet.getResource(XtextResourceSet.java:263)
	at org.eclipse.xtext.ide.server.ProjectManager.getResource(ProjectManager.java:169)
	at org.eclipse.xtext.ide.server.WorkspaceManager.doRead(WorkspaceManager.java:436)
	at org.eclipse.xtext.ide.server.findReferences.WorkspaceResourceAccess.readOnly(WorkspaceResourceAccess.java:36)
	at org.eclipse.xtext.ide.server.symbol.DocumentSymbolService.doRead(DocumentSymbolService.java:332)
	at org.eclipse.xtext.ide.server.symbol.DocumentSymbolService.getDefinitions(DocumentSymbolService.java:112)
	at org.eclipse.xtext.ide.server.symbol.DocumentSymbolService.getDefinitions(DocumentSymbolService.java:99)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$definition$24(LanguageServerImpl.java:603)
	at org.eclipse.xtext.ide.server.WorkspaceManager.doRead(WorkspaceManager.java:438)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.definition(LanguageServerImpl.java:602)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.definition(LanguageServerImpl.java:590)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$definition$23(LanguageServerImpl.java:581)
	at org.eclipse.xtext.ide.server.concurrent.ReadRequest.lambda$doRun$0(ReadRequest.java:66)
	... 5 more

Any hints/help where and how I shall start investigating that? Thanks a lot upfront.

2

On top there is now a long list of exceptions around “IndexOutOfBoundsException”, which keeps posting lines to my Visual Studio, such as:

Caused by: java.lang.IndexOutOfBoundsException: Position [
  line = 63
  character = 48
] text was : //VAR Elemente
    var Timer Abwesenheits_timer = null

… then it posts my whole rules file content and ends with

at org.eclipse.xtext.ide.server.Document.getOffSet(Document.java:62)
	at org.eclipse.xtext.ide.server.occurrences.DefaultDocumentHighlightService.getDocumentHighlights(DefaultDocumentHighlightService.java:96)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$documentHighlight$35(LanguageServerImpl.java:758)
	at org.eclipse.xtext.ide.server.WorkspaceManager.doRead(WorkspaceManager.java:438)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.documentHighlight(LanguageServerImpl.java:757)
	at org.eclipse.xtext.ide.server.LanguageServerImpl.lambda$documentHighlight$34(LanguageServerImpl.java:743)
	at org.eclipse.xtext.ide.server.concurrent.ReadRequest.lambda$doRun$0(ReadRequest.java:66)
	... 5 more

Any idea? I am really completely lost.

3

Really it sounds like a fairly dramatic version of a missing bracket or suchlike in your rules file. Maybe start building a new file section by section to track it down.