Java lsp (jdtls) not working

[FreyrDev]

Summary

hx --health java gives a tick for finding jdtls, but when in a java file no LSP features are present. No code actions, errors, autocomplete, or anything else.

The output of hx --health java:

Configured language servers:
  ✓ jdtls: C:\Users\Freyr\AppData\Local\jdtls\bin\jdtls.bat
Configured debug adapter: None
Highlight queries: ✓
Textobject queries: ✓
Indent queries: ✓

Reproduction Steps

I tried this:

1. Open a .java file
2. Try to perform commands that use the LSP such as <space>k or <space>a

I expected this to happen:

The relevant commands would execute

Instead, this happened:

The command bar at the bottom shows No configured language server supports <whatever feature you tried>

Helix log

%localappdata%\helix\helix.log

2023-11-25T20:27:28.731 helix_vcs [INFO] Error {
    context: "failed to open git repo",
    source: Discover(
        NoGitRepository {
            path: "C:\\Users\\Freyr\\Personal\\University\\SCC.212-Advanced-Programming\\Interfaces",
        },
    ),
}
2023-11-25T20:27:28.737 helix_vcs [INFO] failed to open diff base for C:\Users\Freyr\Personal\University\SCC.212-Advanced-Programming\Interfaces\Test.java
2023-11-25T20:27:28.738 helix_vcs [INFO] Error {
    context: "failed to open git repo",
    source: Discover(
        NoGitRepository {
            path: "C:\\Users\\Freyr\\Personal\\University\\SCC.212-Advanced-Programming\\Interfaces",
        },
    ),
}
2023-11-25T20:27:28.738 helix_vcs [INFO] failed to obtain current head name for C:\Users\Freyr\Personal\University\SCC.212-Advanced-Programming\Interfaces\Test.java
2023-11-25T20:27:28.753 helix_lsp::transport [INFO] jdtls -> {"jsonrpc":"2.0","method":"initialize","params":{"capabilities":{"general":{"positionEncodings":["utf-8","utf-32","utf-16"]},"textDocument":{"codeAction":{"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}},"dataSupport":true,"disabledSupport":true,"isPreferredSupport":true,"resolveSupport":{"properties":["edit","command"]}},"completion":{"completionItem":{"deprecatedSupport":true,"insertReplaceSupport":true,"resolveSupport":{"properties":["documentation","detail","additionalTextEdits"]},"snippetSupport":true,"tagSupport":{"valueSet":[1]}},"completionItemKind":{}},"hover":{"contentFormat":["markdown"]},"inlayHint":{"dynamicRegistration":false},"publishDiagnostics":{"versionSupport":true},"rename":{"dynamicRegistration":false,"honorsChangeAnnotations":false,"prepareSupport":true},"signatureHelp":{"signatureInformation":{"activeParameterSupport":true,"documentationFormat":["markdown"],"parameterInformation":{"labelOffsetSupport":true}}}},"window":{"workDoneProgress":true},"workspace":{"applyEdit":true,"configuration":true,"didChangeConfiguration":{"dynamicRegistration":false},"didChangeWatchedFiles":{"dynamicRegistration":true,"relativePatternSupport":false},"executeCommand":{"dynamicRegistration":false},"inlayHint":{"refreshSupport":false},"symbol":{"dynamicRegistration":false},"workspaceEdit":{"documentChanges":true,"failureHandling":"abort","normalizesLineEndings":false,"resourceOperations":["create","rename","delete"]},"workspaceFolders":true}},"clientInfo":{"name":"helix","version":"23.10 (f6021dd0)"},"processId":6536,"rootPath":"C:\\Users\\Freyr\\Personal\\University\\SCC.212-Advanced-Programming\\Interfaces","rootUri":null,"workspaceFolders":[]},"id":0}
2023-11-25T20:27:29.125 helix_lsp::transport [ERROR] jdtls err <- "WARNING: Using incubator modules: jdk.incubator.vector\r\n"
2023-11-25T20:27:29.619 helix_lsp::transport [ERROR] jdtls err <- "Nov 25, 2023 8:27:29 PM org.apache.aries.spifly.BaseActivator log\r\n"
2023-11-25T20:27:29.619 helix_lsp::transport [ERROR] jdtls err <- "INFO: Registered provider ch.qos.logback.classic.servlet.LogbackServletContainerInitializer of service jakarta.servlet.ServletContainerInitializer in bundle ch.qos.logback.classic\r\n"
2023-11-25T20:27:29.622 helix_lsp::transport [ERROR] jdtls err <- "Nov 25, 2023 8:27:29 PM org.apache.aries.spifly.BaseActivator log\r\n"
2023-11-25T20:27:29.622 helix_lsp::transport [ERROR] jdtls err <- "INFO: Registered provider ch.qos.logback.classic.spi.LogbackServiceProvider of service org.slf4j.spi.SLF4JServiceProvider in bundle ch.qos.logback.classic\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "Nov 25, 2023 8:27:31 PM org.eclipse.lsp4j.jsonrpc.RemoteEndpoint fallbackResponseError\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "SEVERE: Internal error: java.lang.reflect.InvocationTargetException\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "java.lang.RuntimeException: java.lang.reflect.InvocationTargetException\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:67)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:120)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:261)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:190)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.jdt.ls.core.internal.ParentProcessWatcher.lambda$1(ParentProcessWatcher.java:144)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.lang.Thread.run(Thread.java:1583)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "Caused by: java.lang.reflect.InvocationTargetException\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.lang.reflect.Method.invoke(Method.java:580)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\t... 12 more\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "Caused by: java.lang.IllegalArgumentException: Illegal character in opaque part at index 2: C:\\Users\\Freyr\\Personal\\University\\SCC.212-Advanced-Programming\\Interfaces\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.net.URI.create(URI.java:932)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.jdt.ls.core.internal.ResourceUtils.canonicalFilePathFromURI(ResourceUtils.java:223)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.handleInitializationOptions(BaseInitHandler.java:100)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.jdt.ls.core.internal.handlers.InitHandler.handleInitializationOptions(InitHandler.java:105)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.initialize(BaseInitHandler.java:64)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.initialize(JDTLanguageServer.java:284)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\t... 14 more\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "Caused by: java.net.URISyntaxException: Illegal character in opaque part at index 2: C:\\Users\\Freyr\\Personal\\University\\SCC.212-Advanced-Programming\\Interfaces\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.net.URI$Parser.fail(URI.java:2995)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.net.URI$Parser.checkChars(URI.java:3166)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.net.URI$Parser.parse(URI.java:3202)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.net.URI.<init>(URI.java:645)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\tat java.base/java.net.URI.create(URI.java:930)\r\n"
2023-11-25T20:27:31.316 helix_lsp::transport [ERROR] jdtls err <- "\t... 20 more\r\n"
2023-11-25T20:27:31.317 helix_lsp::transport [ERROR] jdtls err <- "\r\n"
2023-11-25T20:27:31.318 helix_lsp::transport [INFO] jdtls <- {"jsonrpc":"2.0","id":0,"error":{"code":-32603,"message":"Internal error.","data":"java.lang.RuntimeException: java.lang.reflect.InvocationTargetException\r\n\tat org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:67)\r\n\tat org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:120)\r\n\tat org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:261)\r\n\tat org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:190)\r\n\tat org.eclipse.jdt.ls.core.internal.ParentProcessWatcher.lambda$1(ParentProcessWatcher.java:144)\r\n\tat org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)\r\n\tat org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)\r\n\tat org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)\r\n\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)\r\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)\r\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\r\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\r\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\r\nCaused by: java.lang.reflect.InvocationTargetException\r\n\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)\r\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:580)\r\n\tat org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)\r\n\t... 12 more\r\nCaused by: java.lang.IllegalArgumentException: Illegal character in opaque part at index 2: C:\\Users\\Freyr\\Personal\\University\\SCC.212-Advanced-Programming\\Interfaces\r\n\tat java.base/java.net.URI.create(URI.java:932)\r\n\tat org.eclipse.jdt.ls.core.internal.ResourceUtils.canonicalFilePathFromURI(ResourceUtils.java:223)\r\n\tat org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.handleInitializationOptions(BaseInitHandler.java:100)\r\n\tat org.eclipse.jdt.ls.core.internal.handlers.InitHandler.handleInitializationOptions(InitHandler.java:105)\r\n\tat org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.initialize(BaseInitHandler.java:64)\r\n\tat org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.initialize(JDTLanguageServer.java:284)\r\n\tat java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)\r\n\t... 14 more\r\nCaused by: java.net.URISyntaxException: Illegal character in opaque part at index 2: C:\\Users\\Freyr\\Personal\\University\\SCC.212-Advanced-Programming\\Interfaces\r\n\tat java.base/java.net.URI$Parser.fail(URI.java:2995)\r\n\tat java.base/java.net.URI$Parser.checkChars(URI.java:3166)\r\n\tat java.base/java.net.URI$Parser.parse(URI.java:3202)\r\n\tat java.base/java.net.URI.\u003cinit\u003e(URI.java:645)\r\n\tat java.base/java.net.URI.create(URI.java:930)\r\n\t... 20 more\r\n"}}
2023-11-25T20:27:31.318 helix_lsp::transport [ERROR] jdtls <- InternalError: Internal error.
2023-11-25T20:27:31.318 helix_lsp [ERROR] failed to initialize language server: protocol error: InternalError: Internal error.
2023-11-25T20:27:37.895 helix_view::editor [ERROR] editor error: No configured language server supports code actions
2023-11-25T20:27:41.261 helix_lsp::transport [INFO] Language server not initialized, shutting down
2023-11-25T20:27:41.261 helix_lsp::client [WARN] language server failed to terminate gracefully - server closed the stream

Platform

Windows 10 22H2

Terminal Emulator

Windows Terminal 1.18.2822.0

Installation Method

Downloaded from releases page

Helix Version

helix 23.10 (f6021dd)

[dead10ck]

This is very likely a problem with your installation of jdtls. I use jdtls myself almost daily.

I suggest:

1. Look at helix debug logs to see if it is reporting any errors
2. Try running jdtls manually at the project root from a shell to see if it launches successfully

[dead10ck]

Probably because of this:

2023-11-25T20:27:28.738 helix_vcs [INFO] Error { context: "failed to open git repo", source: Discover( NoGitRepository { path: "C:\\Users\\Freyr\\Personal\\University\\SCC.212-Advanced-Programming\\Interfaces", }, ), }

We use git repos as one of the markers of where the root of the project is (which is not always the current working directory). I'm guessing there probably also isn't a pom.xml or build.gradle. If it's just a random Java file, we can't make any assumptions about where the project root is. And without those build systems, I'm willing to bet that jdtls is also probably not very useful; probably all you're gonna get is surface level syntax errors, if anything.

[kotx]

This makes sense, workspaceFolders would be empty(?), but I don't see why rootUri would be omitted when rootPath exists.
I assumed rootUri is equivalent to rootPath, and rootPath is just for compatibility with older LSP servers.

[dead10ck]

@pascalkuthe any thoughts?

[FreyrDev]

Duh, I should've checked the git thing. I switched my programming to Linux shortly after the original post for (mostly) unrelated reasons, so I didn't have a chance to use Helix in an actual Java project on Windows. I've just gone back and checked now and yep it works fine in a git repo, while still having the problem in non-project files.

Helix+Jdtls does seem to work fine for non-project files on Linux (With the "non-project file, syntax errors only" warning obviously), so yeah it is Windows being Weird of course.

[lesleyrs]

Thanks a lot, for some reason in my logfile it doesn't mention git (it only mentions URI) but that was the problem.