Expected Behavior

A web plug should bootRun for development.

Actual Behaviour

bootRun fails to start application.
In build classes are produced but no libs or resolvedMainClassName file that a working web app has.

Steps To Reproduce

From Grails Forge web app created 06/25/2025:

Grails Version: 7.0.0-SNAPSHOT
Gorm Implementation: Gorm Hibernate5
Embedded Servlet Container: Spring Boot Starter Tomcat
Test Framework: Spock

Project Type: Web Plugin
Java Version: 21
Name: myplugin
Base Package: com.example

No added features.

./gradlew bootRun --info

Task :classes
Skipping task ':classes' as it has no actions.
Resolve mutations for :findMainClass (Thread[#234,Execution worker,5,main]) started.
:findMainClass (Thread[#234,Execution worker,5,main]) started.

Task :findMainClass
Build cache key for task ':findMainClass' is 2e8fb4db1253c5949434f6e51e60eea7
Task ':findMainClass' is not up-to-date because:
Task.upToDateWhen is false.
There is neither a bootJar or bootWar task that will run. Skipping finding main Application class.
Stored cache entry for task ':findMainClass' with cache key 2e8fb4db1253c5949434f6e51e60eea7
Resolve mutations for :bootRun (Thread[#234,Execution worker,5,main]) started.
:bootRun (Thread[#234,Execution worker,5,main]) started.

Task :bootRun FAILED
Caching disabled for task ':bootRun' because:
Application should always run
Task ':bootRun' is not up-to-date because:
Task has not declared any outputs despite executing actions.

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':bootRun'.

No main class specified and classpath is not an executable jar.

In build.gradle, if I comment out:
// apply plugin: "org.apache.grails.gradle.grails-plugin"

It will bootRun:

Task :classes
Skipping task ':classes' as it has no actions.
Resolve mutations for :findMainClass (Thread[#435,Execution worker,5,main]) started.
:findMainClass (Thread[#435,Execution worker,5,main]) started.

Task :findMainClass
Build cache key for task ':findMainClass' is be1741b4aadd3b0e43cc66427eeae89d
Task ':findMainClass' is not up-to-date because:
Task.upToDateWhen is false.
Stored cache entry for task ':findMainClass' with cache key be1741b4aadd3b0e43cc66427eeae89d
Resolve mutations for :bootRun (Thread[#435,Execution worker,5,main]) started.
:bootRun (Thread[#435,Execution worker,5,main]) started.

Task :bootRun
Caching disabled for task ':bootRun' because:
Application should always run
Task ':bootRun' is not up-to-date because:
Task has not declared any outputs despite executing actions.
Starting process 'command '/Users/carl/.sdkman/candidates/java/21.0.7.fx-librca/bin/java''.

rs/carl/.gradle/caches/modules-2/files-2.1/org.graalvm.sdk/word/24.1.2/58113ba6514ffe9a702ba9e6998655f44ea70b66/word-24.1.2.jar com.example.Application
Successfully started process 'command '/Users/carl/.sdkman/candidates/java/21.0.7.fx-librca/bin/java''

Grails application running at http://localhost:8080 in environment: development

User mailing list discussion:
https://lists.apache.org/thread/mb03y0hbs92sohltodtqb4n2rdcpbw5c

Environment Information

OS: Mac OS X 15.5 aarch64
Gradle (Wrapper): 8.14
Launcher JVM: 21.0.7 (BellSoft 21.0.7+9-LTS)

Example Application

see Grails Forge instructions above.

Version

7.0.0-SNAPSHOT (also 7.0.0-M4)