java.lang.String is not an interface

[pablocarle]

Initially reported in redhat-developer/vscode-java#3342

Extension Name: vscode-gradle
Extension Version: 3.13.0
OS Version: MacOS Ventura
VSCode version:

Version: 1.83.1
Commit: f1b07bd25dfad64b0167beb15359ae573aecd2cc
Date: 2023-10-10T23:46:55.789Z
Electron: 25.8.4
ElectronBuildId: 24154031
Chromium: 114.0.5735.289
Node.js: 18.15.0
V8: 11.4.183.29-electron.0
OS: Darwin x64 22.6.0

Describe the bug
Enabling this extension together with the java language server from redhat results in the latter failing.
Also seems to be avoided by disabling java.gradle.buildServer.enabled

Does the bug still exist if you disable all other extensions?
No

Additional context

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-10-16 17:07:49.855
!MESSAGE Non-Static Commands: [java.maven.initializeSearcher, java.maven.searchArtifact, java.maven.addDependency, java.maven.controlContext]

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-10-16 17:07:49.882
!MESSAGE RepositoryRegistryUpdateJob finished 0ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-10-16 17:07:49.905
!MESSAGE >> initialized

!ENTRY org.eclipse.jdt.ls.core 4 0 2023-10-16 17:08:10.331
!MESSAGE Initialization failed 
!STACK 0
java.util.concurrent.CompletionException: org.eclipse.lsp4j.jsonrpc.ResponseErrorException: java.lang.IllegalArgumentException: java.lang.String is not an interface
	at java.base/java.util.concurrent.CompletableFuture.reportJoin(CompletableFuture.java:413)
	at java.base/java.util.concurrent.CompletableFuture.join(CompletableFuture.java:2118)
	at com.microsoft.gradle.bs.importer.GradleBuildServerProjectImporter.importToWorkspace(GradleBuildServerProjectImporter.java:105)
	at org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.importProjects(ProjectsManager.java:152)
	at org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.initializeProjects(ProjectsManager.java:114)
	at org.eclipse.jdt.ls.core.internal.handlers.InitHandler$1.runInWorkspace(InitHandler.java:260)
	at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:43)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: org.eclipse.lsp4j.jsonrpc.ResponseErrorException: java.lang.IllegalArgumentException: java.lang.String is not an interface
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleResponse(RemoteEndpoint.java:209)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:193)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:577)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1623)

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-10-16 17:08:10.378
!MESSAGE >> initialization job finished

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-10-16 17:08:10.384
!MESSAGE >> registerWatchers'

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-10-16 17:08:10.387
!MESSAGE >> registerFeature 'workspace/didChangeWatchedFiles'

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-10-16 17:08:10.767
!MESSAGE >> build jobs finished

[jdneo]

@pablocarle Is it possible to share a sample project to us?

[pablocarle]

@pablocarle Is it possible to share a sample project to us?

Hi, this is an open source project I work on that constantly has this issue https://github.com/zowe/api-layer . It only works (with both extensions) when it's a clean open, so a fresh start should work fine, but then a restart of vscode triggers the issue. I just tried it on a fresh git clone.

Disabling the gradle extension fixes the issue on opening (as it keeps on looping forever)

Once the Language Support for Java extension finishes loading I can enable the gradle extension once again and everything is fine.

[jdneo]

The latest pre-release 3.13.2024011802 should fix this problem. Please have a try.