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https://issues.apache.org/jira/browse/MAHOUT-1225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13665185#comment-13665185
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Dawid Weiss commented on MAHOUT-1225:
-------------------------------------
Yeah... good to know where the current development takes place. I'll reapply
this to the current code and will be back if any of these issues still apply.
> Sets and maps incorrectly clear() their state arrays (potential endless loops)
> ------------------------------------------------------------------------------
>
> Key: MAHOUT-1225
> URL: https://issues.apache.org/jira/browse/MAHOUT-1225
> 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,
> mushroom.dat
>
> 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
> test.java 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
> http://labs.carrotsearch.com/hppc.html or below in the attachment).
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