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HBase, mail # user - Debugging Coprocessor code in Eclipse


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anil gupta 2012-10-14, 23:58
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Ramkrishna.S.Vasudevan 2012-10-15, 05:03
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anil gupta 2012-10-16, 16:46
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Re: Debugging Coprocessor code in Eclipse
Eugeny Morozov 2012-10-16, 20:17
Anil,

you could've also get some benefit from using HBaseTestingUtility. It is
able to run HBase cluster in standalone mode all-in-one JVM. Of course it
requires to have some code to create tables, assign coprocessor to table
and populate it with data. And then run client code against it.

All of that could be done using Unit tests framework, which will give you
ability to test the whole server.

It also possible that HBase will be crashed by itself due to timeouts, but
having this kind of preparation would allow you to restart it in a matter
of seconds to continue debuggind.

Hope this helps.

On Tue, Oct 16, 2012 at 8:46 PM, anil gupta <[EMAIL PROTECTED]> wrote:

> Hi Ram,
>
> Thanks for your reply. I'll be trying your suggestions soon with the my
> local standalone installation of HBase and update this thread.
>
> Thanks,
> Anil Gupta
>
> On Mon, Oct 15, 2012 at 12:03 AM, Ramkrishna.S.Vasudevan <
> [EMAIL PROTECTED]> wrote:
>
> > Hi Anil
> >
> > We also do a lot of stuff with coprocessors MasterObservers,
> > RegionObservers
> > and WALObservers.
> > Just start your master and RS in debug mode and connect remotely from
> > eclipse.  This should be fine.  Whenever the code goes to the
> > RegionObserver
> > or any observers automatically you will be able to debug.  Only thing is
> > ensure that the JAR that is running remotely and your current source code
> > are in sync.  Otherwise you may not go thro the exact lines.
> >
> > You can add debug mode to your JAVA_OPTS like this
> > exec "$JAVA" $JAVA_HEAP_MAX $HBASE_OPTS
> > -Xrunjdwp:transport=dt_socket,address=4530,server=y,suspend=n -classpath
> > "$CLASSPATH" $CLASS "$@
> >
> > Hope this helps.
> >
> > Regards
> > Ram
> >
> >
> > > -----Original Message-----
> > > From: anil gupta [mailto:[EMAIL PROTECTED]]
> > > Sent: Monday, October 15, 2012 5:29 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: Debugging Coprocessor code in Eclipse
> > >
> > > Hi All,
> > >
> > > I am using HBase0.92.1 and currently working on HBase RegionObserver
> > > and
> > > some other coprocessor stuff. For testing this stuff, i have to deploy
> > > my
> > > jar on the cluster and put in a lot of logging to understand the
> > > problems,
> > > if any.
> > > Is there a way to debug my region observer within eclipse. Please share
> > > your experiences/suggestions on debugging co-processors.
> > >
> > > I am able to debug filters and other client side code from eclipse by
> > > remotely connecting to cluster. But, i am unable to find a way to debug
> > > the
> > > code which runs within RegionServers.
> > >
> > > Here is my random thought:
> > > I think i would be able to debug the co-processor code if i run the
> > > Stand-alone HBase instance from a eclipse java project which contains
> > > the
> > > java source code of HBase0.92.1 and my Region Observer.
> > >
> > > If the above seems like a feasible idea, then please let me know how to
> > > run
> > > the HBase Standalone instance from a eclipse java project. Run
> > > Configurations?Jars?
> > >
> > > --
> > > Thanks & Regards,
> > > Anil Gupta
> >
> >
>
>
> --
> Thanks & Regards,
> Anil Gupta
>

--
Evgeny Morozov
Developer Grid Dynamics
Skype: morozov.evgeny
www.griddynamics.com
[EMAIL PROTECTED]
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anil gupta 2012-10-16, 20:52
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Ramkrishna.S.Vasudevan 2012-10-17, 04:09
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yuling 2012-10-17, 00:58