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From "Dawid Weiss (JIRA)" <>
Subject [jira] [Commented] (MAHOUT-1225) Sets and maps incorrectly clear() their state arrays (potential endless loops)
Date Mon, 03 Jun 2013 06:21:21 GMT


Dawid Weiss commented on MAHOUT-1225:

Ehm. I've closed this issue as per Robin's comment above but I don't think this was the right
way to go -- this should have been left open (with a fixed resolution) until a release is
made. Apologies for the noise. I can't reopen it now -- probably missing some Jira's karma
to do this. Please correct my mistake if you have admin rights, reopen and then bulk close
at release time. Thanks!
> Sets and maps incorrectly clear() their state arrays (potential endless loops)
> ------------------------------------------------------------------------------
>                 Key: MAHOUT-1225
>                 URL:
>             Project: Mahout
>          Issue Type: Bug
>          Components: Math
>    Affects Versions: 0.7
>         Environment: Eclipse, linux Fedora 17, Java 1.7, Mahout Maths collections (Set)
0.7, hppc 0.4.3
>            Reporter: Sophie Sperner
>            Assignee: Dawid Weiss
>              Labels: hashset, java, mahout, test
>             Fix For: 0.7
>         Attachments: hppc-0.4.3.jar, MAHOUT-1225.patch, MAHOUT-1225.patch, MAHOUT-1225.patch,
>   Original Estimate: 48h
>  Remaining Estimate: 48h
> The code I attached hangs on forever, Eclipse does not print me its stack trace because
it does not terminate the program. So I decided to make a small file that you can
easily run.
> This code has the main function that simply runs getItemList() method which successfully
executes getDataset() method (here please download mushroom.dat dataset and set the full path
into filePath string variable) and the hangs on (the problem happens on a fourth columnValues.add()
call). After the dataset was taken into X array, the code simply goes through X column by
column and searches for different items in it.
> If you uncomment IntSet columnValues = new IntOpenHashSet(); and corresponding import
headers then everything will work just fine (you will also need to include hppc jar file found
here or below in the attachment).

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