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https://issues.apache.org/jira/browse/MAHOUT-1225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13663401#comment-13663401
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Dawid Weiss commented on MAHOUT-1225:
-------------------------------------
I wouldn't be impolite to people who are trying to help you, Sophie. Software
bugs are omnipresent and are not necessarily a result of one's negligence --
very often it's a process of multiple rewrites by many people. In this
particular case collections have been ported over from Colt and multiple
changes layered.
Judging from the test code you submitted on this issue I am pretty confident
that the choice of collections library is secondary -- your problem is in
algorithmic solutions to whatever it is you're trying to achieve.
> OpenIntHashSet hangs on forever on the fourth add.
> --------------------------------------------------
>
> 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
> Labels: hashset, java, mahout, test
> Fix For: 0.7
>
> Attachments: hppc-0.4.3.jar, mushroom.dat, test.java
>
> 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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