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https://issues.apache.org/jira/browse/MAHOUT-1157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adam Bozanich updated MAHOUT-1157:
----------------------------------

    Status: Patch Available  (was: Open)

use iterateNonZero() when vector is not dense.
                
> AbstractCluster.formatVector iteration bug.
> -------------------------------------------
>
>                 Key: MAHOUT-1157
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1157
>             Project: Mahout
>          Issue Type: Bug
>          Components: Clustering
>    Affects Versions: 0.7
>            Reporter: Adam Bozanich
>         Attachments: mahout.patch
>
>
> AbstractCluster.formatVector's use of the size field of the given vector 
> causes problems when the vector is sparse.
> When reading WeightedVectorWriteables from the clusteredPoints directory that 
> was created by running kmeans with the -cl flag, the embedded 
> RandomAccessSparseVector is being instantiated with 
> I clustered a handful of vectors which had been initialized with a 
> cardinality of Integer.MAX_VALUE. Running seqdump on the resulting 
> clusteredPoints took over four minutes.

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