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From Karim Awara <karim.aw...@kaust.edu.sa>
Subject Re: Hadoop 2.x with Eclipse
Date Mon, 04 Nov 2013 05:09:14 GMT
The thing is.. when I downloaded the source code and compiled it with
maven. There exist  no configuration files to configure. So I assume maven
has its own way of test the unit tests... or am I missing something?

--
Best Regards,
Karim Ahmed Awara


On Mon, Nov 4, 2013 at 7:53 AM, Tsuyoshi OZAWA <ozawa.tsuyoshi@gmail.com>wrote:

> Instead of Ted's approach, it's also useful to use surefire plugin
> when you debug tests.
>
> mvn test -Dmaven.surefire.debug -Dtest=TestClassName
>
> This commands accept debugger's attach on 5005 port by default, so you
> can attach via eclipse's debugger. Then the test runs and you can use
> debugger. I think the source code is needed to be compiled in your
> local environment instead of just downloading it from hadoop's
> release.
>
> Thanks,
> Tsuyoshi
>
> On Sun, Nov 3, 2013 at 11:22 PM, Karim Awara <karim.awara@kaust.edu.sa>
> wrote:
> > Hi guys,
> >
> > Can I just install the HDFS project and debug it? (assuming I am running
> a
> > <put> command through the command line). If so, which project should I
> > download (hadoop project that has hdfs)?
> >
> > --
> > Best Regards,
> > Karim Ahmed Awara
> >
> >
> > On Sun, Oct 6, 2013 at 5:40 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> >>
> >> Karim:
> >> If you want to debug unit tests, using Eclipse is a viable approach.
> >> Here is what I did the past week debugging certain part of hadoop
> >> (JobSubmitter in particular) through an HBase unit test.
> >>
> >> Run 'mvn install -DskipTests' to install hadoop locally
> >> Open the class you want to debug and place breakpoint at proper location
> >> Open unit test which depends on the class above and select Debug As ->
> >> JUnit Test
> >> When breakpoint hits, associate the sources.jar file in local maven repo
> >> with the class. In my case, the sources jar file is located under
> >>
> ~/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-core/2.1.2-SNAPSHOT
> >>
> >> You should be able to step through hadoop code as usual at this point.
> >>
> >> Cheers
> >>
> >>
> >> On Sun, Oct 6, 2013 at 6:14 AM, John Lilley <john.lilley@redpoint.net>
> >> wrote:
> >>>
> >>> Karim,
> >>>
> >>>
> >>>
> >>> I am not an experienced Hadoop programmer, but what I found was that
> >>> building and debugging Hadoop under Eclipse was very difficult, and I
> was
> >>> never to make it work correctly.  I suggest using the well documented
> >>> command-line Maven build, installing Hadoop from that build, and
> running it
> >>> normally.  Once you have that working, run your namemode or datanode
> daemon
> >>> so as to wait for a remote debugger attach before starting.  You
> should also
> >>> get comfortable with log4j, the logging framework used by Hadoop, as
> those
> >>> log files are often your best friend when trying to debug a collection
> of
> >>> services.
> >>>
> >>>
> >>>
> >>> john
> >>>
> >>>
> >>>
> >>> From: Karim Awara [mailto:karim.awara@kaust.edu.sa]
> >>> Sent: Sunday, October 06, 2013 5:41 AM
> >>> To: user
> >>> Subject: Hadoop 2.x with Eclipse
> >>>
> >>>
> >>>
> >>> Hi,
> >>>
> >>> I followed the instructions on how to import hadoop files to Eclipse (I
> >>> am using hadoop 2.1 beta).
> >>>
> >>> Currently on my machine, I have hadoop 2.1 installed.. and its source
> >>> code is imported on Eclipse. What I can't grasp is   how to proceed
> from
> >>> there?
> >>>
> >>> I want to modify HDFS code (blockplacement strategy).. Now building
> hdfs
> >>> project via generates errors to me (unresolved types in hadoop
> common).  and
> >>> if i built successfully, how to test my modified code?
> >>>
> >>>
> >>> --
> >>> Best Regards,
> >>> Karim Ahmed Awara
> >>>
> >>>
> >>>
> >>> ________________________________
> >>>
> >>> This message and its contents, including attachments are intended
> solely
> >>> for the original recipient. If you are not the intended recipient or
> have
> >>> received this message in error, please notify me immediately and
> delete this
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> >>> prohibited. Please consider the environment before printing this email.
> >>
> >>
> >
> >
> > ________________________________
> > This message and its contents, including attachments are intended solely
> for
> > the original recipient. If you are not the intended recipient or have
> > received this message in error, please notify me immediately and delete
> this
> > message from your computer system. Any unauthorized use or distribution
> is
> > prohibited. Please consider the environment before printing this email.
>
>
>
> --
> - Tsuyoshi
>

-- 

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