Java Fails to Run in Version >56.2 #1598

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1. github-actions commented on Jan 5, 2026

   

   github-actionsBot

   on Jan 5, 2026 – with GitHub Actions

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   Hi Ryan Russell-Verhoef (@Detrilemma), 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.

   It looks like you’re hitting a NoSuchMethodError in the Eclipse JDT core (isMainMethodCandidate) when the Java Debug adapter tries to find your main method. That usually means your Java language server and the debugger extension are out of sync.

   Suggestions:

   • Update both extensions to their latest versions:

     • Debugger for Java by Microsoft: https://marketplace.visualstudio.com/items?itemName=vscjava.vscode-java-debug
     • Language Support for Java™ by Red Hat: https://marketplace.visualstudio.com/items?itemName=redhat.java

   • Verify your JDK settings point to the same runtime:

     // in settings.json
     "java.home": "<path-to-your-JDK>",
     "java.configuration.runtimes": [
       { "name": "JavaSE-<version>", "path": "<same-path-to-your-JDK>" }
     ]

   • Reload VS Code (Developer: Reload Window) and check Help → Toggle Developer Tools for errors.

   • If the problem persists:

     1. Enable verbose debug logging:

        "java.debug.verboseLogging": true

     2. Capture the log from the Debug Console and VS Code’s Developer Tools.
     3. Open a new issue here (attach the log and your settings.json):
        https://github.com/microsoft/vscode-java-debug/issues/new

   Other references with low confidence

   • Version 0.11+ broke JDK 8 support: shows how to set java.home and java.configuration.runtimes to align multiple JDKs
     • Version 0.11 and above broke JDK8 support vscode-java-dependency#310 (comment)

   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!
2. github-actions

   added

   ai-triaged

   bug

   on Jan 5, 2026
3. wenytang-ms commented on Jan 9, 2026

   

   wenyt (wenytang-ms)

   on Jan 9, 2026

   Contributor

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   Ryan Russell-Verhoef (@Detrilemma) can you share more details about this issue? or provide some project?
4. wenyt (wenytang-ms)

   added

   needs more info

   on Jan 9, 2026
5. Detrilemma commented on Jan 9, 2026

   

   Ryan Russell-Verhoef (Detrilemma)

   on Jan 9, 2026

   Author

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   The debugger fails to run any Java code. The only way I can get it to work is if I install version 56.2.
6. github-actions

   removed

   needs more info

   on Jan 9, 2026
7. Changyong Gong (chagong)

   assigned

   Jinbo Wang (testforstephen)

   and unassigned

   Jinbo Wang (testforstephen)

   on Jan 30, 2026
8. wenyt (wenytang-ms)

   added a commit that references this issue on Mar 30, 2026

   fix: handle NoSuchMethodError for isMainMethodCandidate() on older JD…

   ...

   This issue will close once commit 0cd59bd is merged into the 'main' branch.

   0cd59bd
9. wenyt (wenytang-ms)

   closed this as completedin java-debug#622on Mar 31, 2026
10. pull

    added a commit that references this issue on Mar 31, 2026

    fix: handle NoSuchMethodError for isMainMethodCandidate() on older JD…

    ...

    This issue will close once commit a4c27fb is merged into the 'main' branch.

    a4c27fb