java.lang.NullPointerException: Cannot invoke "org.eclipse.m2e.core.embedder.IMaven.getSettings()" because the return value of "org.eclipse.m2e.core.MavenPlugin.getMaven()" is null

[tmingniu]

4�� 30, 2026 2:17:49 ���� org.apache.aries.spifly.BaseActivator log
��Ϣ: Registered provider ch.qos.logback.classic.spi.LogbackServiceProvider of service org.slf4j.spi.SLF4JServiceProvider in bundle ch.qos.logback.classic
4�� 30, 2026 2:17:52 ���� org.eclipse.lsp4j.jsonrpc.RemoteEndpoint fallbackResponseError
����: Internal error: Cannot invoke "org.eclipse.m2e.core.embedder.IMaven.getSettings()" because the return value of "org.eclipse.m2e.core.MavenPlugin.getMaven()" is null
java.lang.NullPointerException: Cannot invoke "org.eclipse.m2e.core.embedder.IMaven.getSettings()" because the return value of "org.eclipse.m2e.core.MavenPlugin.getMaven()" is null
at org.eclipse.jdt.ls.core.internal.preferences.StandardPreferenceManager.update(StandardPreferenceManager.java:125)
at org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.handleInitializationOptions(BaseInitHandler.java:146)
at org.eclipse.jdt.ls.core.internal.handlers.InitHandler.handleInitializationOptions(InitHandler.java:95)
at org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.initialize(BaseInitHandler.java:68)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.initialize(JDTLanguageServer.java:287)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)
at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:128)
at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:271)
at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:201)
at org.eclipse.jdt.ls.core.internal.ParentProcessWatcher.lambda$1(ParentProcessWatcher.java:86)
at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:185)
at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:97)
at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:114)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)

[Error - 14:17:52] Language Support for Java client: couldn't create connection to server.
Message: Internal error.
Code: -32603
java.lang.NullPointerException: Cannot invoke "org.eclipse.m2e.core.embedder.IMaven.getSettings()" because the return value of "org.eclipse.m2e.core.MavenPlugin.getMaven()" is null
at org.eclipse.jdt.ls.core.internal.preferences.StandardPreferenceManager.update(StandardPreferenceManager.java:125)
at org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.handleInitializationOptions(BaseInitHandler.java:146)
at org.eclipse.jdt.ls.core.internal.handlers.InitHandler.handleInitializationOptions(InitHandler.java:95)
at org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.initialize(BaseInitHandler.java:68)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.initialize(JDTLanguageServer.java:287)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)
at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:128)
at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:271)
at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:201)
at org.eclipse.jdt.ls.core.internal.ParentProcessWatcher.lambda$1(ParentProcessWatcher.java:86)
at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:185)
at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:97)
at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:114)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)

How can i solve this problem？ It took me a lot of time. Perhaps VSCode is simply not suitable for Java programming.

[github-actions]

Hi tmingniu, I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

---

Similar Known Issue

The error you're encountering — NullPointerException where org.eclipse.m2e.core.MavenPlugin.getMaven() returns null during JDTLanguageServer initialization — is a known issue that has been tracked upstream.

There is an existing issue with an identical stack trace in the vscode-java repository:

• Failed to initialize language server due to "Internal error. Caused by: NPE: Cannot invoke 'o.e.m.c.e.IMaven.getSettings()' because the return value of 'o.e.m.c.MavenPlugin.getMaven()' is null"

  This issue tracks the exact same NPE during StandardPreferenceManager.update() → BaseInitHandler.handleInitializationOptions() → JDTLanguageServer.initialize(). A comment in that issue notes it is more likely to occur on Windows than on macOS or Linux. No confirmed workaround has been published yet, but following or commenting on that issue may give you the latest updates.

While waiting for an official fix, you could try the following general troubleshooting steps:

1. Restart the Java Language Server: Open the Command Palette (Ctrl+Shift+P / Cmd+Shift+P) and run Java: Restart Java Language Server.
2. Clean the Java workspace: Run Java: Clean Java Language Server Workspace from the Command Palette and choose to restart.
3. Check your Maven installation: Ensure Maven is properly installed and MAVEN_HOME (or M2_HOME) is set correctly in your environment.
4. Update your extensions: Make sure Language Support for Java(TM) by Red Hat is up to date.

Other references with low confidence

• Language Support for Java client: couldn't create connection to server: Different root cause, but same symptom — link
• Language Support for Java client: couldn't create connection to server (Code: -32603): Various workarounds discussed — link
• [1.22.1] couldn't create connection to server (Code: -32603): Related server connection failure discussion — link

---

The team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!

[tmingniu]

你好，我是一名AI支持助理，来帮你解决问题。在团队审核你的请求期间，我想提供一些可能的建议和文档，可能对你有帮助。

类似的已知问题

你遇到的错误——初始化时返回——是一个已知问题，已被追踪到上游。NullPointerException``org.eclipse.m2e.core.MavenPlugin.getMaven()``null``JDTLanguageServer

vscode-java 仓库中存在一个相同的栈跟踪问题：

• 由于“内部错误。原因：NPE：无法调用'o.e.m.c.e.IMaven.getSettings（）'，因为'o.e.m.c.MavenPlugin.getMaven（）'的返回值为空”

  本期追踪的 NPE 在 → → 期间完全相同。该期中有评论指出，这种情况在Windows上比在macOS或Linux上更可能发生。目前尚无确认的解决方法发布，但关注或评论该问题可能会获得最新更新。StandardPreferenceManager.update()``BaseInitHandler.handleInitializationOptions()``JDTLanguageServer.initialize()

在等待官方修复期间，你可以尝试以下一般的排查步骤：

1. 重启 Java 语言服务器：打开命令面板（ / ）并运行 。Ctrl+Shift+P``Cmd+Shift+P``Java: Restart Java Language Server
2. 清理 Java 工作区：从命令面板运行并选择重启。Java: Clean Java Language Server Workspace
3. 检查你的Maven安装：确保Maven在你的环境中安装正确，并且（或）设置正确。MAVEN_HOME``M2_HOME
4. **更新你的扩展：**确保它是最新的。Language Support for Java(TM) by Red Hat

其他缺乏信心的参考文献

• Java 客户端的语言支持：无法与服务器建立连接：原因不同，但症状相同——链接
• Java **客户端的语言支持：无法创建与服务器的连接（代码：-32603）：**讨论了各种变通方法 — 链接
• **[1.22.1] 无法创建与服务器的连接（代码：-32603）：**相关服务器连接失败讨论 — 链接

团队会很快回复您的问题。希望这些建议在此期间对你有帮助。如果这条评论帮到了你，请给它一个。 👍如果建议不合适或不正确，请给它一个。 👎您的反馈帮助我们改进！

it dosen't work

[wenytang-ms]

eclipse-jdtls/eclipse.jdt.ls#3773