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https://issues.apache.org/jira/browse/SUREFIRE-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tibor Digana reassigned SUREFIRE-1459:
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Assignee: Tibor Digana
> mvn+java7 and POM with toolchains targeting java8 fail in surefire plugin
> -------------------------------------------------------------------------
>
> Key: SUREFIRE-1459
> URL: https://issues.apache.org/jira/browse/SUREFIRE-1459
> Project: Maven Surefire
> Issue Type: Improvement
> Components: Maven Surefire Plugin
> Affects Versions: 2.20.1
> Environment: Maven 3.3.9 started with JDK 7
> (on Windows Server 2012)
> Reporter: Rüdiger Groß-Hardt
> Assignee: Tibor Digana
> Labels: toolchains
>
> We compile and test with a POM using a toolchain configuration targeting JDK
> 8. Maven itself runs with JDK 7. If we run tests with the
> maven-surefire-plugin and forkCount=1 and reuseForks=false the build fails
> with
> _java.lang.UnsupportedClassVersionError: SomeTestClass : Unsupported
> major.minor version 52.0_
> If we set reuseForks=true, it builds fine. Other combinations seem to fail,
> if the plugin code running in the JDK 7 context presumably needs to use
> reflections to enumerate test classes.
> As newbies to toolchains, we were assuming, that toolchains enabled us to
> effectively decouple the JDK version used to run maven from the JDK version
> used to run the tests.
> This problem took us quite some time to solve. As an improvement I would
> suggest a meaningful warning or error message stating that the surefire
> plugin must be run with a JDK version higher than or equal to the version of
> the target JDK from the toolchain configuration.
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