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From "Paritosh Ranjan (JIRA)" <>
Subject [jira] [Updated] (MAHOUT-1091) Bug in SequentialAccessSparseVector full iteration
Date Mon, 08 Oct 2012 21:44:02 GMT


Paritosh Ranjan updated MAHOUT-1091:

    Attachment: MAHOUT-1091.patch

Just tried out of curiosity. The patch contains the fix and a junit test demonstrating the

The math module's test cases pass after this fix. Have not checked the complete build yet.

> Bug in SequentialAccessSparseVector full iteration
> --------------------------------------------------
>                 Key: MAHOUT-1091
>                 URL:
>             Project: Mahout
>          Issue Type: Bug
>          Components: Math
>            Reporter: Ted Dunning
>             Fix For: 0.8
>         Attachments: MAHOUT-1091.patch
> The iterator for the SequentialAccessSparseVector doesn't return any items beyond the
last non-zero.  This breaks some stuff pretty massively, but hopefully doesn't break much
user code since iterating through all elements of a sparse vector is a relatively rare thing
to do.

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