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The Language Support for Java server crashed 5 times in the last 3 minutes. The server will not be restarted.

See original GitHub issue

Receiving the following error when opening a Maven project folder:

Environment

Operating System: Windows 10
JDK version: both java version “1.8.0_141” AND openjdk version “11.0.1” 2018-10-16
Visual Studio Code version: Version: 1.29.1 (user setup) Commit: bc24f98b5f70467bc689abf41cc5550ca637088e Date: 2018-11-15T19:13:36.375Z Electron: 2.0.12 Chrome: 61.0.3163.100 Node.js: 8.9.3 V8: 6.1.534.41 Architecture: x64
Java extension version: 0.35.0 (November 30th, 2018)

Steps To Reproduce

Install the Language Support for Java™ by Red Hat extension (no other extensions are active)
Create a new Maven project using the quickstart archetype
Open the folder with the new Maven project
See the error

I am unable to attach the Java Language Server log file. I followed the steps here, but when I run the the Java: Open Java Language Server log file command nothing happens.

Current Result

Expected Result

Additional Informations

Issue Analytics

State:
Created 5 years ago
Comments:39 (3 by maintainers)

Top GitHub Comments

72reactions

Pedroteixeirabisognincommented, Apr 21, 2021

Press CTRL + SHIFT + P, and type Java: Clean Java Language Server Workspace. It works for me.

59reactions

scotshallcommented, Dec 12, 2018

Thank you for giving me the “java.jdt.ls.vmargs” setting, I was able to figure out what was going wrong.

I had installed the Lombok Annotations Support for VS Code extension awhile back and decided to remove it. However, the extension added some parameters to the java.jdt.ls.vmargs setting: "-noverify -Xmx1G -XX:+UseG1GC -XX:+UseStringDeduplication -javaagent:\"C:\\Users\\SHall\\.vscode\\extensions\\gabrielbb.vscode-lombok-0.9.7/server/lombok.jar\" -Xbootclasspath/a:\"C:\\Users\\SHall\\.vscode\\extensions\\gabrielbb.vscode-lombok-0.9.7/server/lombok.jar\""

When I removed the extension, the settings were still present but the Language Server was unable to the load the manifest from the lombok.jar file (because it was deleted). This caused the Language Server to fail to start.

After adding the -Dlog.level=ALL parameter to the java.jdt.ls.vmargs setting, I was finally able to see the error in the output view. I’ve put the java.jdt.ls.vmargs setting back to its default value and everything is working properly again.

Thank you for your help! You can close this issue.