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Posted to dev@nutch.apache.org by "Andrzej Bialecki (JIRA)" <ji...@apache.org> on 2009/02/06 14:35:59 UTC

[jira] Commented: (NUTCH-683) NUTCH-676 broke CrawlDbMerger

    [ https://issues.apache.org/jira/browse/NUTCH-683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12671129#action_12671129 ] 

Andrzej Bialecki  commented on NUTCH-683:
-----------------------------------------

+1.

> NUTCH-676 broke CrawlDbMerger
> -----------------------------
>
>                 Key: NUTCH-683
>                 URL: https://issues.apache.org/jira/browse/NUTCH-683
>             Project: Nutch
>          Issue Type: Bug
>    Affects Versions: 1.0.0
>            Reporter: Doğacan Güney
>            Assignee: Doğacan Güney
>            Priority: Minor
>             Fix For: 1.0.0
>
>         Attachments: crawldbmerger_v2.patch
>
>
> Switch to hadoop's MapWritable broke CrawlDbMerger. Part of the reason is that we reuse the same MapWritable instance during reduce
> which apparently is a big no-no for hadoop's MapWritable. Also, hadoop's MapWritable#putAll doesn't work (I think.... see HADOOP-5142),
> so we should also work around that.

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