Re: How to use hadoop wiht tomcat!!

[RogerDimitri <ro...@yahoo.com>]

Hi Alejandro,
   Even I am trying to port Hadoop to Tomcat. I have a few questions based
on your reply.
1. How did you clear Jetty dependancy when you ported Hadoop to tomcat? 
2. Did you write your custom servlets for all the Task tracking related
stuff?!!

Thanks,
Roger

Alejandro Abdelnur-2 wrote:
> 
> we do it by including the Hadoop and its depent JARs in the webapp lib
> directory. It just works, you should exclude jetty and servlet jars
> files.
> 
> 
> 
> On Jan 21, 2008 12:39 PM, Ted Dunning <td...@veoh.com> wrote:
>>
>> I would say that it is generally better practice to deploy hadoop.jar in
>> the
>> lib directory of the war file that you are deploying so that you can
>> change
>> versions of hadoop more easily.
>>
>> Your problem is that you have dropped the tomcat support classes from
>> your
>> CLASSPATH in the process of getting hadoop involved.
>>
>> Go back to the simplest hello world servlet that you can have and make
>> sure
>> that works.  Then build up gently back to where you have access to the
>> hadoop jar.
>>
>>
>>
>> On 1/20/08 8:16 PM, "Sandhya Kishore" <tu...@yahoo.com> wrote:
>>
>> > Hi,
>> >
>> >     I am trying to develop a webapplication that submit jobs to HADOOP
>> > map/reduce. I have added hadoop.jar and all the dependencies to tomcat
>> lib and
>> > deployed my webapp in tomat. But it is saying that it is not able to
>> find the
>> > servlet calss.CAn anybody help me..Thanks alot
>> >
>> > ---yoda
>> >
>> >
>> > ---------------------------------
>> > Looking for last minute shopping deals?  Find them fast with Yahoo!
>> Search.
>>
>>
> 
> 

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Re: How to use hadoop wiht tomcat!!

[Erich Nachbar <er...@gmail.com>]

I had a similar problem with another 3rd party app running inside  
Tomcat and ended up using Jetty in embedded mode instead.

Super simple to setup (just set it up from your Java main) and deploy  
(Jetty is one JAR):
http://jetty.mortbay.org/xref/org/mortbay/jetty/example/MinimalServlets.html

On Feb 28, 2008, at 1:01 PM, sandybandy wrote:

>
> Hi , I have put hadoop-core.jar and all dependent JARS in webapp lib  
> and also
> all XMLBEAN jars in webapp lib since my mapreducer program is using  
> these
> XMLBEAN jar files to process xml document. But when I submit a job via
> servlet it is saying "java.lang.NoClassDefFoundError:
> org/apache/xmlbeans/XmlException" . But I have placed all the JARS  
> that are
> related to above exception to web app lib. Can anybody give me ideas  
> on this
> once?
>
> --Yoda
> -- 
> View this message in context: http://www.nabble.com/How-to-use-hadoop-wiht-tomcat%21%21-tp14991778p15745908.html
> Sent from the Hadoop lucene-users mailing list archive at Nabble.com.
>

Re: How to use hadoop wiht tomcat!!

[Josh Ma <be...@gmail.com>]

sandybandy wrote:
> 
> Hi , I have put hadoop-core.jar and all dependent JARS in webapp lib and
> also all XMLBEAN jars in webapp lib since my mapreducer program is using
> these XMLBEAN jar files to process xml document. But when I submit a job
> via servlet it is saying "java.lang.NoClassDefFoundError:
> org/apache/xmlbeans/XmlException" . But I have placed all the JARS that
> are related to above exception to web app lib. Can anybody give me ideas
> on this once?
> 
> --Yoda
> 

You need to attach you XMLBEAN jars by 
DistributedCache.addArchiveToClassPath(Path, Configuration).:-), I think you
need to read 
http://hadoop.apache.org/core/docs/r0.16.1/mapred_tutorial.html this page
.Good luck.

-- Shihua Ma
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Re: How to use hadoop wiht tomcat!!

[sandybandy <tu...@yahoo.com>]

Hi , I have put hadoop-core.jar and all dependent JARS in webapp lib and also
all XMLBEAN jars in webapp lib since my mapreducer program is using these
XMLBEAN jar files to process xml document. But when I submit a job via
servlet it is saying "java.lang.NoClassDefFoundError:
org/apache/xmlbeans/XmlException" . But I have placed all the JARS that are
related to above exception to web app lib. Can anybody give me ideas on this
once?

--Yoda
-- 
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