[jira] Resolved: (LUCENE-1681) DocValues infinite loop caused by - a call to getMinValue | getMaxValue | getAverageValue

["Mark Miller (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-1681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Miller resolved LUCENE-1681.
---------------------------------

    Resolution: Fixed

Thanks Simon!

> DocValues infinite loop caused by - a call to getMinValue | getMaxValue | getAverageValue
> -----------------------------------------------------------------------------------------
>
>                 Key: LUCENE-1681
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1681
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Search
>    Affects Versions: 2.2, 2.3, 2.3.1, 2.3.2, 2.3.3, 2.4, 2.4.1, 2.4.2, 2.9, 3.0
>            Reporter: Simon Willnauer
>            Assignee: Mark Miller
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: DocValues.patch
>
>
> org.apache.lucene.search.function.DocValues offers 3 public (optional) methods to access value statistics like min, max and average values of the internal values. A call to one of the methods will result in an infinite loop. The internal counter is not incremented. 
> I added a testcase, javadoc and a slightly different implementation to it. I guess this is not breaking any back compat. as a call to those methodes would have caused an infinite loop anyway.
> I changed the return value of all of those methods to Float.NaN if the DocValues implementation does not contain any values.
> It might be considerable to fix this in 2.4.2 and 2.3.3

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