I have a question related to the Typo3 v10 Solr extension. For some reasons some pages can not be indexed properly. In the logs I see these errors:
Failed to execute Page Indexer Request. See log for details. Request ID:
In the logs it looks like some requests contain empty raw body. Rest pages with same type have been indexed properly. Maybe someone has encountered similar issues with solr indexer? What cause the issue in this case?
Hey guys I need to know how we can disable kerberos authentication on ambari for solr & spark2 web consoles.
I'm getting the Error 401 - Unauthorized access.
I just want to get in the web consoles with no need for authentication.
I don't need Spnego too.
Please let me know if you need more information.
Best Regards,
André Santos
#Bedjase, This is just a hack. You can look (in ambari) at what was changed for each component, and their dependencies, then try to remove those configuration changes created by kerberizing the cluster. You may find its more than just those Solr and Spark. If you just change those two, it could break stuff in the cluster (zookeeper, Ambari-metrics, and more). This kind of change is also going to make the cluster not something that is supportable for future upgrades.
I'm going to test my SOLR analyzer and I've found instructions how to do it here: https://cwiki.apache.org/confluence/display/solr/Running+Your+Analyzer.
But I need to check several thousand of words, so I'm going to do it programmatically, not manually. Does SOLR have any REST API to run analyzer?
Thank you!
The Solr Admin page is just a set of static HTML files that uses the REST API offered by Solr behind the scenes. If you watch the Network tab in your browser's developer tools while navigating it, you'll see all the endpoints it talks to.
After doing this on the Analysis page, you can see that it makes requests to three endpoints, one to fetch the HTML, then two new requests to get the schema (for the field list) and one to perform the actual analysis:
http://localhost:8983/solr/corename/analysis/field?wt=json&analysis.showmatch=true&analysis.fieldvalue=asd&analysis.query=asd&analysis.fieldname=content
Iam able to set up the Apache Nutch and get the data indexed in Solr. While indexing I am trying to make sure only modified pages gets indexed. Below are the 2 questions we have regarding this.
Is it possible to tell Nutch to send ‘If-modified-since’ header while
crawling the site and download the page only if it has changed since
the last time it was crawled.
I could see that Nutch is forming the MD5 digest out of the
retrieved page content, but even though digest hasn’t changed
(compared to previous version), it is still the indexing the page
in Solr. Is there any setting with in Nutch to make sure if the
content hasn’t changed have it not index in Solr?
Answering my own question here, Hope it helps someone
Once I set the adaptivefetchschedule, could see that Nutch was not pulling the pages that hasnt changed.Its honoring if-modified-since header.
I am interested to do web crawling. I was looking at solr.
Does solr do web crawling, or what are the steps to do web crawling?
Solr 5+ DOES in fact now do web crawling!
http://lucene.apache.org/solr/
Older Solr versions do not do web crawling alone, as historically it's a search server that provides full text search capabilities. It builds on top of Lucene.
If you need to crawl web pages using another Solr project then you have a number of options including:
Nutch - http://lucene.apache.org/nutch/
Websphinx - http://www.cs.cmu.edu/~rcm/websphinx/
JSpider - http://j-spider.sourceforge.net/
Heritrix - http://crawler.archive.org/
If you want to make use of the search facilities provided by Lucene or SOLR you'll need to build indexes from the web crawl results.
See this also:
Lucene crawler (it needs to build lucene index)
Solr does not in of itself have a web crawling feature.
Nutch is the "de-facto" crawler (and then some) for Solr.
Solr 5 started supporting simple webcrawling (Java Doc). If want search, Solr is the tool, if you want to crawl, Nutch/Scrapy is better :)
To get it up and running, you can take a detail look at here. However, here is how to get it up and running in one line:
java
-classpath <pathtosolr>/dist/solr-core-5.4.1.jar
-Dauto=yes
-Dc=gettingstarted -> collection: gettingstarted
-Ddata=web -> web crawling and indexing
-Drecursive=3 -> go 3 levels deep
-Ddelay=0 -> for the impatient use 10+ for production
org.apache.solr.util.SimplePostTool -> SimplePostTool
http://datafireball.com/ -> a testing wordpress blog
The crawler here is very "naive" where you can find all the code from this Apache Solr's github repo.
Here is how the response looks like:
SimplePostTool version 5.0.0
Posting web pages to Solr url http://localhost:8983/solr/gettingstarted/update/extract
Entering auto mode. Indexing pages with content-types corresponding to file endings xml,json,csv,pdf,doc,docx,ppt,pptx,xls,xlsx,odt,odp,ods,ott,otp,ots,rtf,htm,html,txt,log
SimplePostTool: WARNING: Never crawl an external web site faster than every 10 seconds, your IP will probably be blocked
Entering recursive mode, depth=3, delay=0s
Entering crawl at level 0 (1 links total, 1 new)
POSTed web resource http://datafireball.com (depth: 0)
Entering crawl at level 1 (52 links total, 51 new)
POSTed web resource http://datafireball.com/2015/06 (depth: 1)
...
Entering crawl at level 2 (266 links total, 215 new)
...
POSTed web resource http://datafireball.com/2015/08/18/a-few-functions-about-python-path (depth: 2)
...
Entering crawl at level 3 (846 links total, 656 new)
POSTed web resource http://datafireball.com/2014/09/06/node-js-web-scraping-using-cheerio (depth: 3)
SimplePostTool: WARNING: The URL http://datafireball.com/2014/09/06/r-lattice-trellis-another-framework-for-data-visualization/?share=twitter returned a HTTP result status of 302
423 web pages indexed.
COMMITting Solr index changes to http://localhost:8983/solr/gettingstarted/update/extract...
Time spent: 0:05:55.059
In the end, you can see all the data are indexed properly.
You might also want to take a look at
http://www.crawl-anywhere.com/
Very powerful crawler that is compatible with Solr.
I have been using Nutch with Solr on my latest project and it seems to work quite nicely.
If you are using a Windows machine then I would strongly recommend following the 'No cygwin' instructions given by Jason Riffel too!
Yes, I agree with the other posts here, use Apache Nutch
bin/nutch crawl urls -solr http://localhost:8983/solr/ -depth 3 -topN 5
Although your solr version has the match the correct version of Nutch, because older versions of solr stores the indices in a different format
Its tutorial:
http://wiki.apache.org/nutch/NutchTutorial
I know it's been a while, but in case someone else is searching for a Solr crawler like me, there is a new open-source crawler called Norconex HTTP Collector
I know this question is quite old, but I'll respond anyway for the newcomer that will wonder here.
In order to use Solr, you can use a web crawler that is capable of storing documents in Solr.
For instance, The Norconex HTTP Collector is a flexible and powerful open-source web crawler that is compatible with Solr.
To use Solr with the Norconex HTTP Collector you will need the Norconex HTTP Collector which is used to crawl the website that you want to collect data from, and you will need to install the Norconex Apache Solr Committer to store collected documents into Solr. When the committer is installed, you will need to configure the XML configuration file of the crawler. I would recommend that you follow this link to get started test how the crawler works and here to know how to configure the configuration file. Finally, you will need this link to configure the committer section of the configuration file with Solr.
Note that if your goal is not to crawl web pages, Norconex also has a Filesystem Collector that can be used with the Sorl Committer as well.
Def Nutch !
Nutch also has a basic web front end which will let you query your search results. You might not even need to bother with SOLR depending on your requirements. If you do a Nutch/SOLR combination you should be able to take advantage of the recent work done to integrate SOLR and Nutch ... http://issues.apache.org/jira/browse/NUTCH-442