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https://issues.apache.org/jira/browse/HADOOP-16299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16834356#comment-16834356
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Akira Ajisaka commented on HADOOP-16299:
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I thought it is no use compiling Apache Hadoop with Java 11 and setting the
target version to 1.8. However, now I'm thinking it is useful for testing
Apache Hadoop (compiled with Java 8) with Java 11.
> [JDK 11] Build fails without specifying -Djavac.version=11
> ----------------------------------------------------------
>
> Key: HADOOP-16299
> URL: https://issues.apache.org/jira/browse/HADOOP-16299
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Akira Ajisaka
> Priority: Major
>
> {{mvn install -DskipTests}} fails on Java 11 without specifying
> {{-Djavac.version=11}}.
> {noformat}
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile)
> on project hadoop-annotations: Fatal error compiling: error: option
> --add-exports not allowed with target 1.8 -> [Help 1]
> {noformat}
> HADOOP-15941 added {{--add-exports}} option when the java version is 11 but
> the option is not allowed when the javac target version is 1.8.
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