[jira] [Commented] (MAHOUT-951) StackOverflow Error when using mahout lucene.vector

["Hudson (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13203147#comment-13203147 ] 

Hudson commented on MAHOUT-951:
-------------------------------

Integrated in Mahout-Quality #1340 (See [https://builds.apache.org/job/Mahout-Quality/1340/])
    MAHOUT-951 unroll recursion to avoid stack overflow

srowen : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1241650
Files : 
* /mahout/trunk/integration/src/main/java/org/apache/mahout/utils/vectors/lucene/LuceneIterator.java

                
> StackOverflow Error when using mahout lucene.vector
> ---------------------------------------------------
>
>                 Key: MAHOUT-951
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-951
>             Project: Mahout
>          Issue Type: Bug
>          Components: Integration
>    Affects Versions: 0.6
>         Environment: presumably would occur on any platform given the same data.
>            Reporter: Paul Rudin
>            Assignee: Sean Owen
>              Labels: patch
>             Fix For: 0.7
>
>         Attachments: 951.patch
>
>
> Running mahout lucene.vector can result in a java StackOverFlowError.
> I think this is probably because the current implementation of LuceneIterator.computeNext() is recursive and with appropriate data the stack becomes too large. The recursion only occurs when you hit a document that doesn't have termvectors in the specified field - so you need a lucene.index with lots of documents lacking such in order to hit this problem.
> I've made minimal changes to convert to a loop rather than recurse and I'll attach a patch to this ticket.

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