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https://issues.apache.org/jira/browse/MATH-1487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16860928#comment-16860928
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Gilles commented on MATH-1487:
------------------------------

bq. I'm wondering how can I get those jars (they are not in the maven central).

They are also available from the ["nightly build"/snapshot 
repository|https://repository.apache.org/content/repositories/snapshots/org/apache/commons/].
We try to get to a first release of the new dependencies (["Commons 
Numbers"|http://commons.apache.org/proper/commons-numbers/] and ["Commons 
Statistics"|http://commons.apache.org/proper/commons-statistics/])...  Please 
subscribe to the "dev" mailing list if you'd like to help. ;-)

However, the easiest option may be to check out the source ([git "master" 
branch|https://gitbox.apache.org/repos/asf?p=commons-math.git]), copy the unit 
test in the appropriate sub-directory of {{src/test}}, and then run
{noformat}
$ mvn test
{noformat}

> MathInternalError - Kolmogorov Smirnov Test
> -------------------------------------------
>
>                 Key: MATH-1487
>                 URL: https://issues.apache.org/jira/browse/MATH-1487
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.6.1
>            Reporter: Paweł Lipiński
>            Priority: Critical
>         Attachments: alpha.arr, beta.arr
>
>
> Hi,
> I spotted a pesky bug in KolmogorovSmirnovTest class, in the method 
> kolmogorovSmirnovTest.
> In order to reproduce the error use arrays from attachments.
> Stacktrace:
> {noformat}
> org.apache.commons.math3.exception.MathInternalError: illegal state: internal 
> error, please fill a bug report at https://issues.apache.org/jira/browse/MATH
> at 
> org.apache.commons.math3.stat.inference.KolmogorovSmirnovTest.fixTies(KolmogorovSmirnovTest.java:1171)
>  at 
> org.apache.commons.math3.stat.inference.KolmogorovSmirnovTest.kolmogorovSmirnovTest(KolmogorovSmirnovTest.java:263)
>  at 
> org.apache.commons.math3.stat.inference.KolmogorovSmirnovTest.kolmogorovSmirnovTest(KolmogorovSmirnovTest.java:290)
> {noformat}
>   



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