You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@nutch.apache.org by Claudio Martella <cl...@tis.bz.it> on 2010/11/23 12:38:22 UTC
nutch doesn't run on cdh and hadoop 0.21 [FIXED with workaround]
Hello list,
in my previous posts i reported about not being able to run nutch on a
hadoop cluster running cloudera's cdh 0.20.2+737.
(http://search.lucidimagination.com/search/document/b66fa844b87b2654/failure_running_on_hadoop#52c43d8c4137ea8c
and
http://search.lucidimagination.com/search/document/a2b151e6a7041c13/nutch_1_x_doesn_t_run_on_cloudera_s_cdh3#2991508ce0ae5d52)
Basically the problem was hadoop not finding some nutch plugin classes
like URLNormalizer etc.
I reported back to cloudera directly
(https://groups.google.com/a/cloudera.org/group/cdh-user/browse_thread/thread/9147acfc4d18cfaf#)
and it looks like the problem is connected to MAPREDUCE-967 (now part of
hadoop 0.21 and backported by cloudera to their cdh 0.20.2).
What the patch does is basically modify the way MapReduce unpacks the
job's jar. The old way was to unpack the whole of it, now only classes/
and lib/ are unpacked. This way nutch is missing the plugins/ directory.
The nutch job format should be changed accordingly.
Todd Lipcon suggested a workaround until that moment: setting
'mapreduce.job.jar.unpack.pattern' configuration to
"(?:classes/|lib/|plugins/).*"
Should I file a JIRA?
--
Claudio Martella
Digital Technologies
Unit Research & Development - Analyst
TIS innovation park
Via Siemens 19 | Siemensstr. 19
39100 Bolzano | 39100 Bozen
Tel. +39 0471 068 123
Fax +39 0471 068 129
claudio.martella@tis.bz.it http://www.tis.bz.it
Short information regarding use of personal data. According to Section 13 of Italian Legislative Decree no. 196 of 30 June 2003, we inform you that we process your personal data in order to fulfil contractual and fiscal obligations and also to send you information regarding our services and events. Your personal data are processed with and without electronic means and by respecting data subjects' rights, fundamental freedoms and dignity, particularly with regard to confidentiality, personal identity and the right to personal data protection. At any time and without formalities you can write an e-mail to privacy@tis.bz.it in order to object the processing of your personal data for the purpose of sending advertising materials and also to exercise the right to access personal data and other rights referred to in Section 7 of Decree 196/2003. The data controller is TIS Techno Innovation Alto Adige, Siemens Street n. 19, Bolzano. You can find the complete information on the web site www.tis.bz.it.
Re: nutch doesn't run on cdh and hadoop 0.21 [FIXED with workaround]
Posted by Andrzej Bialecki <ab...@getopt.org>.
On 2010-11-23 12:38, Claudio Martella wrote:
> Hello list,
>
> in my previous posts i reported about not being able to run nutch on a
> hadoop cluster running cloudera's cdh 0.20.2+737.
> (http://search.lucidimagination.com/search/document/b66fa844b87b2654/failure_running_on_hadoop#52c43d8c4137ea8c
> and
> http://search.lucidimagination.com/search/document/a2b151e6a7041c13/nutch_1_x_doesn_t_run_on_cloudera_s_cdh3#2991508ce0ae5d52)
>
> Basically the problem was hadoop not finding some nutch plugin classes
> like URLNormalizer etc.
>
> I reported back to cloudera directly
> (https://groups.google.com/a/cloudera.org/group/cdh-user/browse_thread/thread/9147acfc4d18cfaf#)
> and it looks like the problem is connected to MAPREDUCE-967 (now part of
> hadoop 0.21 and backported by cloudera to their cdh 0.20.2).
>
> What the patch does is basically modify the way MapReduce unpacks the
> job's jar. The old way was to unpack the whole of it, now only classes/
> and lib/ are unpacked. This way nutch is missing the plugins/ directory.
> The nutch job format should be changed accordingly.
>
> Todd Lipcon suggested a workaround until that moment: setting
> 'mapreduce.job.jar.unpack.pattern' configuration to
> "(?:classes/|lib/|plugins/).*"
>
> Should I file a JIRA?
Thank you for tracking this down! Yes, please do. I think that Nutch 1.3
(if it's ever released ;) ) is going to use a more recent version of
Hadoop, the same with trunk, but at least people will be able to find
this information.
--
Best regards,
Andrzej Bialecki <><
___. ___ ___ ___ _ _ __________________________________
[__ || __|__/|__||\/| Information Retrieval, Semantic Web
___|||__|| \| || | Embedded Unix, System Integration
http://www.sigram.com Contact: info at sigram dot com
Re: nutch doesn't run on cdh and hadoop 0.21 [FIXED with workaround]
Posted by "Mattmann, Chris A (388J)" <ch...@jpl.nasa.gov>.
Hi Claudio,
Thanks very much for tracking this down. Sure, please file a JIRA, thank you.
Cheers,
Chris
On Nov 23, 2010, at 3:38 AM, Claudio Martella wrote:
> Hello list,
>
> in my previous posts i reported about not being able to run nutch on a
> hadoop cluster running cloudera's cdh 0.20.2+737.
> (http://search.lucidimagination.com/search/document/b66fa844b87b2654/failure_running_on_hadoop#52c43d8c4137ea8c
> and
> http://search.lucidimagination.com/search/document/a2b151e6a7041c13/nutch_1_x_doesn_t_run_on_cloudera_s_cdh3#2991508ce0ae5d52)
>
> Basically the problem was hadoop not finding some nutch plugin classes
> like URLNormalizer etc.
>
> I reported back to cloudera directly
> (https://groups.google.com/a/cloudera.org/group/cdh-user/browse_thread/thread/9147acfc4d18cfaf#)
> and it looks like the problem is connected to MAPREDUCE-967 (now part of
> hadoop 0.21 and backported by cloudera to their cdh 0.20.2).
>
> What the patch does is basically modify the way MapReduce unpacks the
> job's jar. The old way was to unpack the whole of it, now only classes/
> and lib/ are unpacked. This way nutch is missing the plugins/ directory.
> The nutch job format should be changed accordingly.
>
> Todd Lipcon suggested a workaround until that moment: setting
> 'mapreduce.job.jar.unpack.pattern' configuration to
> "(?:classes/|lib/|plugins/).*"
>
> Should I file a JIRA?
>
> --
> Claudio Martella
> Digital Technologies
> Unit Research & Development - Analyst
>
> TIS innovation park
> Via Siemens 19 | Siemensstr. 19
> 39100 Bolzano | 39100 Bozen
> Tel. +39 0471 068 123
> Fax +39 0471 068 129
> claudio.martella@tis.bz.it http://www.tis.bz.it
>
> Short information regarding use of personal data. According to Section 13 of Italian Legislative Decree no. 196 of 30 June 2003, we inform you that we process your personal data in order to fulfil contractual and fiscal obligations and also to send you information regarding our services and events. Your personal data are processed with and without electronic means and by respecting data subjects' rights, fundamental freedoms and dignity, particularly with regard to confidentiality, personal identity and the right to personal data protection. At any time and without formalities you can write an e-mail to privacy@tis.bz.it in order to object the processing of your personal data for the purpose of sending advertising materials and also to exercise the right to access personal data and other rights referred to in Section 7 of Decree 196/2003. The data controller is TIS Techno Innovation Alto Adige, Siemens Street n. 19, Bolzano. You can find the complete information on the web site www.tis.bz.it.
>
>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Chris Mattmann, Ph.D.
Senior Computer Scientist
NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA
Office: 171-266B, Mailstop: 171-246
Email: Chris.Mattmann@jpl.nasa.gov
WWW: http://sunset.usc.edu/~mattmann/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Adjunct Assistant Professor, Computer Science Department
University of Southern California, Los Angeles, CA 90089 USA
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++