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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAHOUT-186) Classifier PriorityQueue returns erroneous results
Date Thu, 08 Oct 2009 07:09:31 GMT

     [ https://issues.apache.org/jira/browse/MAHOUT-186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Owen updated MAHOUT-186:
-----------------------------

    Attachment: MAHOUT-186.patch

> Classifier PriorityQueue returns erroneous results
> --------------------------------------------------
>
>                 Key: MAHOUT-186
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-186
>             Project: Mahout
>          Issue Type: Bug
>    Affects Versions: 0.1, 0.2
>            Reporter: Robin Anil
>            Assignee: Robin Anil
>             Fix For: 0.2
>
>         Attachments: MAHOUT-186.patch, MAHOUT-186.patch
>
>
> A simple test fails 
> import org.apache.hadoop.util.PriorityQueue;
> PriorityQueue<ClassifierResult> queue = new ClassifierResultPriorityQueue(3);
>     queue.insert(new ClassifierResult("label1", 5));
>     queue.insert(new ClassifierResult("label2", 4));
>     queue.insert(new ClassifierResult("label3", 3));
>     queue.insert(new ClassifierResult("label4", 2));
>     queue.insert(new ClassifierResult("label5", 1));
>     
>     assertEquals("Incorrect Size", 3, queue.size());
>     log.info(queue.pop().toString());
>     log.info(queue.pop().toString());
>     log.info(queue.pop().toString());
> 09/10/07 16:58:39 INFO common.ClassifierResultPriorityQueueTest: ClassifierResult{category='label3',
score=3.0}
> 09/10/07 16:58:39 INFO common.ClassifierResultPriorityQueueTest: ClassifierResult{category='label4',
score=2.0}
> 09/10/07 16:58:39 INFO common.ClassifierResultPriorityQueueTest: ClassifierResult{category='label5',
score=1.0}
> Expected label1 and label2 at the top

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