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https://issues.apache.org/jira/browse/NUTCH-1150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17181937#comment-17181937
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Sebastian Nagel commented on NUTCH-1150:
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This is solved by NUTCH-2776 using a cache limited by size and time. Thanks, 
for the patch, [~vijithv], nice solution using a Bloom filter. Of course, while 
memory efficient the Bloom filter has the disadvantage that the false positives 
redirects are not (or only later) followed.

> http.redirect.max can lead to multiple parses of the same url
> -------------------------------------------------------------
>
>                 Key: NUTCH-1150
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1150
>             Project: Nutch
>          Issue Type: Bug
>    Affects Versions: 1.3, 1.4
>            Reporter: Markus Jelsma
>            Priority: Major
>         Attachments: NUTCH-1150.patch
>
>
> With http.redirect.max > 0 it's possible that a document is parsed multiple 
> times. This is the case when several url's from the same fetch redirect to a 
> shared location.



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