Maven shade plugin configuration in spring-boot-starter-parent does not append META-INF/spring/*.imports files

[FloEberle]

Hello everyone

We are using maven shade in latest version 3.3.0 to build our jar. When upgrading from Spring Boot 2.6.8 to 2.7.0 the actuator endpoints seem no longer to work in the shaded jar.
Since I am unsure if this is caused by spring boot or maven shade, therefore I raised the issue there too.

I created a small demo project to visualize the issue. All help is appreciated.

Thanks in advance!

[philwebb]

Thanks for the report. This is due to changes we made to the way that auto-configuration classes are found. You can fix your build by changing the <transformers> section to:

<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
  <resource>META-INF/spring.handlers</resource>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
  <resource>META-INF/spring.schemas</resource>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
  <resource>META-INF/spring/org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration.imports</resource>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
  <resource>META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports</resource>
</transformer>

[philwebb]

We should update our spring-boot-starter-parent project and also check our documentation.

[FloEberle]

Thanks a lot, that actually resolves the issue! 😎
How can I buy u a coffee/beer @philwebb ? 🙃

[mf81bln]

@philwebb Thanks a lot for the quick response! ❤️

I assume this is the change you're referring to?
https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.7-Release-Notes#changes-to-auto-configuration

If so, perhaps it would be helpful to mention the necessary changes in the release notes? Even though many rely on the spring-boot-starter-parent, I assume that others also encounter the same problem as we did while using spring-boot-dependencies.

[philwebb]

This has now been fixed. I've also added a new section to the release notes.