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POGetting No Urls to Fetch error on Nutch, even though there are Urls to fetch
 

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  1. POGetting No Urls to Fetch error on Nutch, even though there are Urls to fetch
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    <p>I am still getting used to Nutch. I managed to get a test crawl going using <code>bin/nutch crawl urls -dir crawl -depth 6 -topN 10</code> over <code>nutch.apache.org</code> as well as indexing it to solr using: <code>bin/nutch crawl urls -solr http://&lt;domain&gt;:&lt;port&gt;/solr/core1/ -depth 4 -topN 7</code></p> <p>Not even mentioning that it times out on my own site, I can't seem to get it to crawl again, or crawl any other sites (e.g. wiki.apache.org). I have deleted all of the crawl directories in the nutch home directory and I still get the following error (stating that there are no more URLs to crawl):</p> <pre><code>&lt;user&gt;@&lt;domain&gt;:/usr/share/nutch$ sudo sh nutch-test.sh solrUrl is not set, indexing will be skipped... crawl started in: crawl rootUrlDir = urls threads = 10 depth = 6 solrUrl=null topN = 10 Injector: starting at 2013-07-03 15:56:47 Injector: crawlDb: crawl/crawldb Injector: urlDir: urls Injector: Converting injected urls to crawl db entries. Injector: total number of urls rejected by filters: 1 Injector: total number of urls injected after normalization and filtering: 0 Injector: Merging injected urls into crawl db. Injector: finished at 2013-07-03 15:56:50, elapsed: 00:00:03 Generator: starting at 2013-07-03 15:56:50 Generator: Selecting best-scoring urls due for fetch. Generator: filtering: true Generator: normalizing: true Generator: topN: 10 Generator: jobtracker is 'local', generating exactly one partition. Generator: 0 records selected for fetching, exiting ... Stopping at depth=0 - no more URLs to fetch. No URLs to fetch - check your seed list and URL filters. crawl finished: crawl </code></pre> <p>My <code>urls/seed.txt</code> file has <code>http://nutch.apache.org/</code> in it.</p> <p>My <code>regex-urlfilter.txt</code> has <code>+^http://([a-z0-9\-A-Z]*\.)*nutch.apache.org//([a-z0-9\-A-Z]*\/)*</code> in it. </p> <p>I have also increase the <code>-depth</code> and <code>topN</code> to specify that there is more to index, but it always gives the error after the first crawl. How do I reset it so that it crawls again? Is there some cache of URLs that needs to be cleaned out somewhere in Nutch?</p> <p><strong>UPDATE</strong>: It seems the problem with our site was that I was not using <code>www</code>, it did not resolve without <code>www</code>. By a <code>ping</code>, www.ourdomain.org does resolve. </p> <p>But i have put this into the necessary files and there is still a problem. Primarily it looks like <code>Injector: total number of urls rejected by filters: 1</code> is the problem across the board, but was not on the first crawl. Why and what filter is rejecting the URL, it should not be.</p>
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