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https://issues.apache.org/jira/browse/PIG-2243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13091942#comment-13091942
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Ashutosh Chauhan commented on PIG-2243:
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Same goes for antlr, Pig's ivy settings explicitly sets antlr version to 3.4 
but building Pig, also results in download of antlr-2.7.7 

> Pig downloads ant-1.6.5 while building which results in warnings later
> ----------------------------------------------------------------------
>
>                 Key: PIG-2243
>                 URL: https://issues.apache.org/jira/browse/PIG-2243
>             Project: Pig
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 0.10
>         Environment: $ ant -version
> Apache Ant version 1.8.1 compiled on October 13 2010
>            Reporter: Ashutosh Chauhan
>            Priority: Minor
>
> It seems like its a dependency of some jar which Pig pulls in. This results 
> in following warnings while running tests: 
> {code}
>  [junit] WARNING: multiple versions of ant detected in path for junit 
>  [junit]          
> jar:file:/usr/share/ant/lib/ant.jar!/org/apache/tools/ant/Project.class
>  [junit]      and 
> jar:file:/home/ashutosh/.ivy2/cache/ant/ant/jars/ant-1.6.5.jar!/org/apache/tools/ant/Project.class
> {code}
> We should configure ivy such that it doesn't download this version of ant, 
> since Pig already has listed ant its direct dependency in ivy and that is 
> version 1.7.1

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