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https://issues.apache.org/jira/browse/NUTCH-1616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13722420#comment-13722420
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Markus Jelsma commented on NUTCH-1616:
--------------------------------------
FYI: we've only seen trouble with large data sets when running on op Hadoop
1.3.0 cluster. We've never seen deviations as described in Localmode.
> SegmentMerger missing proper crawl_fetch datum
> ----------------------------------------------
>
> Key: NUTCH-1616
> URL: https://issues.apache.org/jira/browse/NUTCH-1616
> Project: Nutch
> Issue Type: Bug
> Affects Versions: 1.7
> Reporter: Markus Jelsma
> Assignee: Markus Jelsma
> Priority: Critical
> Fix For: 1.8
>
> Attachments: NUTCH-1616-1.8.patch
>
>
> Merged 26036 vs. unmerged 26038 indexed documents! There are two records on
> the merged segment that no longer have a crawl_fetch CrawlDatum with a
> fetch_success status. Instead, the only crawl_fetch CrawlDatum has status
> linked!
> The original segment two crawl_fetch CrawlDatums with linked and the
> fetch_success status.
> Without the fetch_success of not_modified status it is not going to be
> indexed.
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