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https://issues.apache.org/jira/browse/NUTCH-769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12783247#action_12783247
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Julien Nioche commented on NUTCH-769:
-------------------------------------

Missed a couple of lines indeed when I was trying to untangle this 
functionality from my (heavily modified) local copy.
checkExceptionThreshold is called after the line 664

              case ProtocolStatus.EXCEPTION:
                logError(fit.url, status.getMessage());
                int killedURLs = 
fetchQueues.checkExceptionThreshold(fit.getQueueID());
                reporter.incrCounter("FetcherStatus", "Exceptions", killedURLs);

I'll attach a modified version of the patch

Thanks

J.

> Fetcher to skip queues for URLS getting repeated exceptions  
> -------------------------------------------------------------
>
>                 Key: NUTCH-769
>                 URL: https://issues.apache.org/jira/browse/NUTCH-769
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>            Reporter: Julien Nioche
>            Priority: Minor
>         Attachments: NUTCH-769-2.patch, NUTCH-769.patch
>
>
> As discussed on the mailing list (see 
> http://www.mail-archive.com/nutch-u...@lucene.apache.org/msg15360.html) this 
> patch allows to clear URLs queues in the Fetcher when more than a set number 
> of exceptions have been encountered in a row. This can speed up the fetching 
> substantially in cases where target hosts are not responsive (as a 
> TimeoutException would be thrown) and limits cases where a whole Fetch step 
> is slowed down because of a few queues.
> by default the parameter fetcher.max.exceptions.per.queue has a value of -1 
> and is deactivated.  

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