Regression in 1.53.0: Gradle import stuck at 70% with Groovy support enabled in custom multi-project settings plugin layout

[filimonm]

Summary

After upgrading VS Code Java extension from 1.52.0 to 1.53.0, Gradle import gets stuck at 70% for a workspace that uses a custom Gradle settings plugin to include many subfolders as subprojects.

The issue disappears when:

• "java.jdt.ls.groovySupport.enabled": false

The issue still occurs when only:

• "java.jdt.ls.kotlinSupport.enabled": false

Regression window

• Works: v1.52.0
• Fails: v1.53.0

Likely related change in this window:

• b1f4e81c4095d4698c7962cd5ef55ae002df36a0 (Support Kotlin,Groovy in Gradle projects)

Environment

• VS Code: 1.110.1
• Extension: redhat.java 1.53.0
• OS: Linux
• JDK: `java-21-openjdk.x86_64

trace.txt


.log

`

• Gradle wrapper: 7+ (project-specific)
• Workspace: multi-project, configured via custom settings plugin

Project structure pattern (sanitized)

• Root project contains many service/platform folders.
• A custom settings plugin dynamically:
  • calls settings.include(...) for many directories
  • rewrites selected subproject build files to not-used.gradle (intentional for this setup)
• Some subprojects use Groovy-related build logic.

No proprietary code can be shared, but behavior is deterministic.

Repro steps (sanitized)

1. Open a Gradle workspace using a custom settings plugin that dynamically includes many subfolders as subprojects.
2. Ensure VS Code Java extension is 1.53.0.
3. Keep default:
   • "java.jdt.ls.groovySupport.enabled": true
4. Trigger Java/Gradle import (open workspace / reload window).

Actual behavior

Import stays around 70% indefinitely with repeated logs similar to:

[Trace] language/status: "70% Starting Java Language Server"
[Trace] $/progress: "Synchronizing Gradle build at <path> - 70%"
[Trace] language/status: "70% Starting Java Language Server - 1 operation remaining."

[snjeza]

@filimonm can you test Java LS 1.55.0?
If you can reproduce the issue with Java LS 1.55.0, can you send a stack trace at the moment when VS Code freezes at 70%?

$ ps -ef | grep id1
$ jstack -l <PID> 

[filimonm]

@snjeza I cannot reproduce with Java LS 1.55.0, the issue is fixed.

[fbricon]

@snjeza what would have fixed it in 1.55?

[snjeza]

what would have fixed it in 1.55?

@fbricon Could you, please, check eclipse-jdtls/eclipse.jdt.ls#3735