JDTLS doesn't work properly with my company gradle project #2806

rohit-s8 · 2023-08-21T19:53:52Z

rohit-s8
Aug 21, 2023

Whenever i try to start jdtls on my company project, I always get the warning on top which says '*.java is a non-project file, only syntax errors are reported'. The project has the required build.gradle and gradle-wrapper.properties files in the standard locations as required. But despite that jdtls is unable to recognize the project as a whole.

Here is the log file from jdtls:

!SESSION 2023-08-21 22:04:08.368 -----------------------------------------------
eclipse.buildId=unknown
java.version=17.0.8
java.vendor=JetBrains s.r.o.
BootLoader constants: OS=macosx, ARCH=aarch64, WS=cocoa, NL=en_US
Command-line arguments:  -data ~/.local/cache/jdtls/companyproject

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.066
!MESSAGE class org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin is started

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.148
!MESSAGE Main thread is waiting

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.163
!MESSAGE >> initialize

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.164
!MESSAGE Initializing Java Language Server 1.26.0.202307271613

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.165
!MESSAGE Started org.eclipse.m2e.core 0ms

!ENTRY org.eclipse.core.jobs 4 2 2023-08-21 22:04:09.467
!MESSAGE An internal error occurred during: "Look up for installed JVMs".
!STACK 0
java.lang.UnsupportedOperationException: remove
	at java.base/java.util.Iterator.remove(Iterator.java:102)
	at java.base/java.util.Collection.removeIf(Collection.java:577)
	at org.eclipse.jdt.internal.launching.DetectVMInstallationsJob.run(DetectVMInstallationsJob.java:66)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.478
!MESSAGE ProjectRegistryRefreshJob finished 312ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.488
!MESSAGE Started org.eclipse.buildship.core 10ms

!ENTRY org.eclipse.jdt.ls.core 4 0 2023-08-21 22:04:09.498
!MESSAGE Failed to load extension bundles 
!STACK 1
org.eclipse.core.runtime.CoreException: Load bundle list
	at org.eclipse.jdt.ls.core.internal.handlers.BundleUtils.loadBundles(BundleUtils.java:172)
	at org.eclipse.jdt.ls.core.internal.handlers.InitHandler.handleInitializationOptions(InitHandler.java:109)
	at org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.initialize(BaseInitHandler.java:64)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.initialize(JDTLanguageServer.java:275)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)
	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.jdt.ls.core.internal.ParentProcessWatcher.lambda$1(ParentProcessWatcher.java:144)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)
Contains: Failed to get bundleInfo for bundle from ~/.local/share/nvim/mason/packages/java-test/extension/server/com.microsoft.java.test.runner-jar-with-dependencies.jar
!SUBENTRY 1 org.eclipse.jdt.ls.core 4 0 2023-08-21 22:04:09.498
!MESSAGE Load bundle list
!SUBENTRY 2 org.eclipse.jdt.ls.core 4 0 2023-08-21 22:04:09.498
!MESSAGE Failed to get bundleInfo for bundle from ~/.local/share/nvim/mason/packages/java-test/extension/server/com.microsoft.java.test.runner-jar-with-dependencies.jar

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.506
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.507
!MESSAGE Non-Static Commands: [java.project.import, java.navigate.openTypeHierarchy, java.project.resolveStackTraceLocation, java.edit.handlePasteEvent, java.edit.stringFormatting, java.project.getSettings, java.project.resolveWorkspaceSymbol, java.project.upgradeGradle, java.project.createModuleInfo, java.edit.organizeImports, java.project.refreshDiagnostics, java.project.removeFromSourcePath, java.project.listSourcePaths, java.project.getAll, java.reloadBundles, java.project.isTestFile, java.project.getClasspaths, java.navigate.resolveTypeHierarchy, java.edit.smartSemicolonDetection, java.project.updateSourceAttachment, java.decompile, java.protobuf.generateSources, java.project.resolveSourceAttachment, java.project.addToSourcePath, java.completion.onDidSelect]

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.507
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.507
!MESSAGE Non-Static Commands: [vscode.java.checkProjectSettings, vscode.java.isOnClasspath, vscode.java.fetchUsageData, vscode.java.validateLaunchConfig, vscode.java.resolveInlineVariables, vscode.java.resolveClassFilters, vscode.java.resolveMainMethod, vscode.java.resolveClasspath, vscode.java.resolveBuildFiles, vscode.java.resolveMainClass, vscode.java.updateDebugSettings, vscode.java.resolveSourceUri, vscode.java.fetchPlatformSettings, vscode.java.buildWorkspace, vscode.java.startDebugSession, vscode.java.inferLaunchCommandLength, vscode.java.resolveElementAtSelection, vscode.java.resolveJavaExecutable]

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.508
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.508
!MESSAGE Non-Static Commands: [vscode.java.test.findJavaProjects, vscode.java.test.findTestPackagesAndTypes, vscode.java.test.findTestTypesAndMethods, vscode.java.test.resolvePath, vscode.java.test.findTestLocation, vscode.java.test.get.testpath, vscode.java.test.findDirectTestChildrenForClass, vscode.java.test.navigateToTestOrTarget, vscode.java.test.junit.argument, vscode.java.test.generateTests]

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.520
!MESSAGE >> initialized

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.530
!MESSAGE RepositoryRegistryUpdateJob finished 12ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.533
!MESSAGE Creating the Java project jdt.ls-java-project

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.569
!MESSAGE Finished creating the Java project jdt.ls-java-project

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.729
!MESSAGE Importing Gradle project(s)

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:04:09.730
!MESSAGE No previous Gradle project at ~/Code/etd, it must be synchronized

!ENTRY org.eclipse.jdt.ls.core 4 0 2023-08-21 22:04:09.739
!MESSAGE Cannot download Gradle sha256 checksum: https://services.gradle.org/distributions-snapshots/gradle-8.2-20230531230216+0000-wrapper.jar.sha256
!STACK 0
java.net.UnknownHostException: services.gradle.org
	at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:572)
	at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
	at java.base/java.net.Socket.connect(Socket.java:633)
	at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:304)
	at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:178)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:533)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:638)
	at java.base/sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:266)
	at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:380)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:193)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1242)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1128)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:179)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1665)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1589)
	at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:224)
	at org.eclipse.jdt.ls.internal.gradle.checksums.DownloadChecksumJob.run(DownloadChecksumJob.java:77)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

!ENTRY org.eclipse.jdt.ls.core 4 0 2023-08-21 22:04:09.741
!MESSAGE Cannot download Gradle sha256 checksum: https://services.gradle.org/distributions-snapshots/gradle-8.3-20230531222006+0000-wrapper.jar.sha256
!STACK 0
java.net.UnknownHostException: services.gradle.org
	at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:572)
	at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
	at java.base/java.net.Socket.connect(Socket.java:633)
	at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:304)
	at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:178)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:533)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:638)
	at java.base/sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:266)
	at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:380)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:193)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1242)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1128)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:179)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1665)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1589)
	at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:224)
	at org.eclipse.jdt.ls.internal.gradle.checksums.DownloadChecksumJob.run(DownloadChecksumJob.java:77)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:09:17.378
!MESSAGE Workspace initialized in 307861ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:09:17.399
!MESSAGE >> initialization job finished

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:09:17.400
!MESSAGE >> registerWatchers'

!ENTRY org.eclipse.jdt.ls.core 4 0 2023-08-21 22:09:17.745
!MESSAGE Command _java.reloadBundles.command not supported on client

!ENTRY java-debug 1 0 2023-08-21 22:09:17.749
!MESSAGE Starting com.microsoft.java.debug.plugin

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:09:17.784
!MESSAGE >> build jobs finished

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:09:18.057
!MESSAGE Reconciled 1. Took 0 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:09:18.695
!MESSAGE begin problem for /C2.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:09:18.695
!MESSAGE 1 problems reported for /C2.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2023-08-21 22:09:18.697
!MESSAGE Validated 1. Took 34 ms

The reason for the unknown host exception is that many domains (including many well-known open source domains) are blocked by the corporate network. But i'm not sure why jdtls needs to download them in the first place. The project uses a gradle wrapper defined by the gradle/wrapper/gradle-wrapper.properties and jdtls should use the gradle wrapper by default according to the documentation. JDTLS is even able to download the gradle version from the defined wrapper correctly as far as i can tell. But even then it just doesn't work.

I've been looking at this problem for days but can't seem to figure it out. It doesn't help that there aren't enough log messages. I tried setting java.trace.server="verbose" and all i got was what i pasted above.

I am looking for help in figuring this out. Any help and guidance in this regard is appreciated.

For more background:
JDTLS Client: nvim-jdtls
Client configuration: https://gitlab.com/roku8/roku.nvim/-/blame/2.x/ftplugin/java.lua#L111
OS: MacOS Ventura 13.5

rohit-s8 · 2023-08-22T07:22:46Z

rohit-s8
Aug 22, 2023
Author

I started seeing this error now:

!ENTRY org.eclipse.buildship.core 4 0 2023-08-22 12:41:07.256
!MESSAGE Can't use Java 17.0.8 and Gradle 6.8.3 to import Gradle project etd.
!STACK 0
org.eclipse.buildship.core.internal.UnsupportedJavaVersionException: The current build uses Gradle 6.8.3 running on Java 17.0.8 which is not supported. Please consult the Gradle documentation to find the compatible combinations: https://docs.gradle.org/current/userguide/compatibility.html.
	at org.eclipse.buildship.core.internal.CompatibilityChecker.validateToolingApiCompatibility(CompatibilityChecker.java:69)
	at org.eclipse.buildship.core.internal.DefaultGradleBuild.synchronize(DefaultGradleBuild.java:84)
	at org.eclipse.jdt.ls.core.internal.managers.GradleProjectImporter.startSynchronization(GradleProjectImporter.java:410)
	at org.eclipse.jdt.ls.core.internal.managers.GradleProjectImporter.importDir(GradleProjectImporter.java:298)
	at org.eclipse.jdt.ls.core.internal.managers.GradleProjectImporter.importToWorkspace(GradleProjectImporter.java:210)
	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:256)
	at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:43)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

So i tried setting java.import.gradle.java.home to the jdk8 home path, but it doesn't seem to help because the same error shows up. To confirm if it is a version compatibility issue, i tried changing the gradle wrapper version to 7.3 which is compatible with java 17 and jdtls started working perfectly after that.

How do i get jdtls to use my jdk8 for gradle. Or rather why doesn't the property java.import.gradle.java.home have any effect?

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JDTLS doesn't work properly with my company gradle project #2806

rohit-s8 Aug 21, 2023

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rohit-s8 Aug 22, 2023 Author

rohit-s8
Aug 21, 2023

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Aug 22, 2023
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