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Support Java 9 Multi-Release JAR files

See original GitHub issue

If a library is included within the executable JAR that states Multi-Release: true within it’s META-INF/MANIFEST.MF the spring boot class loader within the executable JAR should support this.

I tested this with 2.0.0.RELEASE (see https://github.com/mvitz/spring-boot-multireleasejar) and it doesn’t work currently.

If there are any more questions or anything I may help you with just ask.

Issue Analytics

State:
Created 6 years ago
Reactions:7
Comments:38 (21 by maintainers)

Top GitHub Comments

2reactions

lumechecommented, Nov 2, 2018

I have a funny case here that is blocking me to upgrade to OpenJDK 11 from java 8. I have a project that has a dependency on another that uses Log4J. That specific jar file is a multi-release jar file and the project that I depends on uses a call that is broken for JAVA 9. Log4J fixed this by relying on the multirelease which makes this jar file works in java 8 and java 9 at the same time (all the details in https://stackoverflow.com/questions/52953483/logmanager-getlogger-is-unable-to-determine-class-name-on-java-11). My problem is that since the multi-relese support in spring boot is nor working well my application crashed badly and there is not much that I can do (other than hack the actuall jar and repacking for myself)

1reaction

wilkinsonacommented, Nov 9, 2018

@MartyIX Thanks for offering to test the patch. There’s no snapshot yet as the changes have not been merged. You should be able to build Boot reasonably quickly (dependency downloads aside) by running ./mvnw -Pfast -DskipTests clean install in the root of the repository.