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From "Sebastian Nagel (JIRA)" <>
Subject [jira] [Commented] (NUTCH-2468) should filter out invalid URLs by default
Date Fri, 11 May 2018 14:37:00 GMT


Sebastian Nagel commented on NUTCH-2468:

Hi [], I assume you are referring to my comment on the [user mailing list|]:
bq. By default filters are only applied to:
 - injected URLs
 - outlinks during parsing
 - redirects (if fetcher follows redirects)

That's how the script bin/crawl behaves in combination with default settings.

Yes, please open a separate issue to change the behavior of Generator. Since very old days
it was written to filter by default, and NUTCH-403 added the option not to filter. Generator
should instead provide the option -filter but do not filter by default. In consequence, there
is no need to set it explicitly in bin/crawl. Thanks!

> should filter out invalid URLs by default
> -----------------------------------------
>                 Key: NUTCH-2468
>                 URL:
>             Project: Nutch
>          Issue Type: Improvement
>          Components: bin
>    Affects Versions: 1.12
>            Reporter: Michael Coffey
>            Priority: Minor
>             Fix For: 2.4, 1.14
> Some Nutch components, by default, should reject invalid URLs. This was recently discussed
in the users mailing list and has affected my work for a while. Although there may be some
special-purpose needs to collect invalid URLs, they are not generally useful for crawling.

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