autobuild not working in some projects, enable already set #1255

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1. github-actions commented on Nov 4, 2025

   

   github-actionsBot

   on Nov 4, 2025 – with GitHub Actions

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   Hi Harris Wang (@menthe), 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.

   Suggestions

   • Verify and set java.configuration.updateBuildConfiguration to "automatic" in your settings:
     https://github.com/redhat-developer/vscode-java#supported-vs-code-settings
   • Inspect the Java Language Server output channel for build errors or warnings on save.
   • Update to the latest Java Extension Pack / vscode-java extension.
   • If you’re using Spring Boot DevTools, this is tracked here (no fix yet):
     • autobuild doesn’t trigger on save: autobuilding with devtool does not work redhat-developer/vscode-java#3450

   Other references with low confidence

   • Startup performance: advice to toggle java.autobuild.enabled for performance, not a fix for autobuild missing: Startup performance vscode-java-dependency#854 (comment)
   • Hot Code Replace message: relates to HCR only when autobuild is off; workaround is enabling autobuild: Hot Code Replace returns Cannot find any changed classes for hot replace! message vscode-java-debug#1481 (comment)
   • Feature request: Autorebuild as Eclipse: explanation of java.autobuild.enabled (no solution): Feature request: Autorebuild option as eclipse vscode-maven#752 (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 Nov 4, 2025