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https://issues.apache.org/jira/browse/LUCENE-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13574542#comment-13574542
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Robert Muir commented on LUCENE-4763:
-------------------------------------
{quote}
javadoc macro uses this incorrect ant.java.version property to execute javadocs.
{quote}
I have no idea how this isnt causing massive problems today. Maybe it has? From
time to time I've noticed on the mailing lists some people get javadocs warnings
that other people cannot see/reproduce... perhaps its related to this bug.
> Fix Java version detection in common-build.xml, use correct source version
> for javadocs, fail build on unsupported java version when documentation
> linting is enabled
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-4763
> URL: https://issues.apache.org/jira/browse/LUCENE-4763
> Project: Lucene - Core
> Issue Type: Bug
> Components: general/build
> Affects Versions: 4.1
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: 4.2, 5.0
>
>
> Followup after the discussion on mailing list; this issue tries to fix the
> following problems in the ANT build:
> - ${ant.java.version} is incorrect for Java 8 with ANT < 1.8.3 (it says its
> Java 7, so we habve otherwise no chance to detect java 8). This can be fixed
> by the same set of reflection tests from Constants.java. We can also fail
> build early if somebody uses Java 1.5
> - javadoc macro uses this incorrect ant.java.version property to execute
> javadocs. The source attribute of the javac task must be ${javac.source}
> (like javac)
> - If we run builds by Jenkins, we silently disable targets that cannot be
> executed. This has effects on real developers. If a real person executes the
> ant tasks it should not pass silently, it should tell the user that his
> configuration is unsupported. This can be done by passing a hidden
> "jenkins-build" property down.
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