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https://issues.apache.org/jira/browse/HDFS-798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12999229#comment-12999229
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Konstantin Boudnik commented on HDFS-798:
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bq. I now worry that ant core is needed for the eclipse javac compiler that
jsp2.1 uses
Steve, I won't be able to tell if you if this patch is breaking anything in
Eclipse or not - I am not using Eclipse for anything. So, if you use it -
please verify if the patch works for you?
bq. ensure that the version of ant that is added is the same version that the
project is built with.
I am not sure if Ivy allows to override version of a transitive dependency.
Maven sure does.
> Exclude second Ant JAR from classpath in hdfs builds
> ----------------------------------------------------
>
> Key: HDFS-798
> URL: https://issues.apache.org/jira/browse/HDFS-798
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: build
> Affects Versions: 0.22.0
> Reporter: Steve Loughran
> Assignee: Konstantin Boudnik
> Priority: Minor
> Attachments: HDFS-798.patch
>
>
> I've no evidence that this is a problem, but I have known it to be in
> different projects:
> {code}
> [junit] WARNING: multiple versions of ant detected in path for junit
> [junit]
> jar:file:/Users/slo/Java/Apache/ant/lib/ant.jar!/org/apache/tools/ant/Project.class
> [junit] and
> jar:file:/Users/slo/.ivy2/cache/ant/ant/jars/ant-1.6.5.jar!/org/apache/tools/ant/Project.class
> {code}
> Somehow Ivy needs to be set up to skip pulling in an old version of Ant in
> the build -both paranamer-ant and jsp-2.1 declare a dependency on it. If both
> tools are only ever run under Ant, the ivy.xml file could exclude it, the
> build file just has to make sure that Ant's own classpath gets passed down.
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