Hi Sachin,

If you're using the default crawl script, I think the answer was in Sebastian's 
email: the default seems to be to filter only in the Parse step. This has 
changed recently, so the Fetch step now filters as well, but only if you have 
the latest code. Otherwise, you need to remove the -noFilter flag from 
generate_args in the crawl script. I missed that, since I don't use this script.
(Generally, always treat Sebastian's answers as The Best Answers!)


-----Original Message-----
From: Sachin Mittal <sjmit...@gmail.com> 
Sent: Friday, 18 October 2019 17:36
To: user@nutch.apache.org
Subject: Re: Parsed segment has outlinks filtered

Setting the prop parse.filter.urls= false does not filter out the outlinks.
I get all the outlinks for my parsed url. So this is working as expected.
However it has caused something unwarranted on the FetcherThread as now it 
seems to be fetching all the urls (even ones which do not match 
These urls were not fetched earlier. So what it seems to be doing is that when 
generating next set of urls, it is not applying urlfilter-regex.

I will play around with noFilter option as Sebastian has mentioned and see if 
this works as expected.

However any idea why the next crawl cycle (from previous crawl cycle's
outlinks) does not seem to be applying the url filters defined in 


On Thu, Oct 17, 2019 at 11:53 PM Sachin Mittal <sjmit...@gmail.com> wrote:

> Hi,
> Thanks I figured this out. Lets hope it works!.
> urlfilter-regex is required to filter out the urls for next crawl, 
> however I still want to index all the outlinks for my current url.
> The reason is that I may not want nutch to crawl these outlinks in 
> next round, but I may still want some other crawler to scrape these urls.
> Sachin
> On Thu, Oct 17, 2019 at 10:01 PM <yossi.tam...@pipl.com> wrote:
>> Hi Sachin,
>> I'm not sure what you are trying to achieve: If you don't want to 
>> filter the outlinks, why do you enable urlfilter-regex?
>> Anyway, if you set the property parse.filter.urls to false, the 
>> Parser will not filter outlinks at all.
>>         Yossi.
>> -----Original Message-----
>> From: Sachin Mittal <sjmit...@gmail.com>
>> Sent: Thursday, 17 October 2019 19:15
>> To: user@nutch.apache.org
>> Subject: Parsed segment has outlinks filtered
>> Hi,
>> I was bit confused on the outlinks generated from a parsed url.
>> If I use the utility:
>> bin/nutch parsechecker url
>> The generated outlinks has all the outlinks.
>> However if I check the dump of parsed segment generated using nutch 
>> crawl script using command:
>> bin/nutch readseg -dump /segments/<>/ /outputdir -nocontent -nofetch 
>> - nogenerate -noparse -noparsetext
>> And I review the same entry's ParseData I see it has lot fewer outlinks.
>> Basically it has filtered out all the outlinks which did not match 
>> the regex's defined in regex-urlfilter.txt.
>> So I want to know if there is a way to avoid this and make sure the 
>> generated outlinks in the nutch segments contains all the urls and 
>> not just the filtered ones.
>> Even if you can point to the code where this url filtering happens 
>> for outlinks I can figure out a way to circumvent this.
>> Thanks
>> Sachin

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