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https://issues.apache.org/jira/browse/MATH-1642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17508833#comment-17508833
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Gilles Sadowski commented on MATH-1642:
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{quote}Percentile implements Serializable
{quote}
It doesn't anymore in the [development
version|https://gitbox.apache.org/repos/asf?p=commons-math.git;a=blob;f=commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/stat/descriptive/rank/Percentile.java;h=6fbfbc696fc539384c5bbaf9a42f1c8e6720ce1b;hb=HEAD]
as per MATH-1594.
> Percentile#evaluate() fails with NullArgumentException: input array after
> deserialization
> ------------------------------------------------------------------------------------------
>
> Key: MATH-1642
> URL: https://issues.apache.org/jira/browse/MATH-1642
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.6.1
> Reporter: Chesnay Schepler
> Priority: Major
>
> {{Percentile}} implements Serializable, which should allow me to create an
> exact copy using java serialization.
> However, {{storedData}} from {{AbstractUnivariateStatistic}} is not being
> serialized, causing any {{evaluate()}} calls on the deserialized
> {{Percentile}} to fail with a {{NullArgumentException}}.
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