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From "Andrzej Bialecki (JIRA)" <j...@apache.org>
Subject [jira] Updated: (NUTCH-814) SegmentMerger bug
Date Tue, 27 Apr 2010 13:38:33 GMT

     [ https://issues.apache.org/jira/browse/NUTCH-814?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrzej Bialecki  updated NUTCH-814:
------------------------------------

    Attachment: merger.patch

Patch fixing the issue, and a unit test. I will commit this shortly.

> SegmentMerger bug
> -----------------
>
>                 Key: NUTCH-814
>                 URL: https://issues.apache.org/jira/browse/NUTCH-814
>             Project: Nutch
>          Issue Type: Bug
>    Affects Versions: 1.1
>            Reporter: Dennis Kubes
>            Assignee: Andrzej Bialecki 
>             Fix For: 1.1
>
>         Attachments: merger.patch
>
>
> Dennis reported:
> {quote}
> In the SegmentMerger.java file about line 150 we have this:
>        final SequenceFile.Reader reader =
>          new SequenceFile.Reader(FileSystem.get(job), fSplit.getPath(),
> job);
> Then about line 166 in the record reader we have this:
> boolean res = reader.next(key, w);
> If I am reading that right, that would mean that the map tap would loop
> over all records for a given file and not just a given split.
> {quote}
> Right, this should instead use SequenceFileRecordReader that already has the logic to
handle splits. Patch coming shortly - thanks for spotting this! This could be the reason for
"out of disk space" errors that many users reported.

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