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From "Otis Gospodnetic (JIRA)" <>
Subject [jira] Updated: (NUTCH-629) Detect slow and timeout servers and drop their URLs
Date Sat, 12 Apr 2008 07:09:07 GMT


Otis Gospodnetic updated NUTCH-629:

    Attachment: NUTCH-629.patch

> Detect slow and timeout servers and drop their URLs
> ---------------------------------------------------
>                 Key: NUTCH-629
>                 URL:
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>            Reporter: Otis Gospodnetic
>         Attachments: NUTCH-629.patch
> Fetch jobs will finish faster if we find a way to prevent servers that are either slow
or time out from slowing down the whole process.
> I'll attach a patch that counts per-server exceptions and timeouts and tracks download
speed per server.
> Queues/sservers that exceed timeout or download thresholds are marked as "tooManyErrors"
or "tooSlow".  Once they get marked as such, all of their subsequent URLs get dropped (i.e.
they do not fetched) and marked GONE.
> At the end of the fetch task, stats for each server processed are printed.
> Also, I believe the per-host/domain/TLD/etc. DB from NUTCH-628 would be the right place
to add server data collected by this patch.

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