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Re: Job Tracker questions
Do you mean want to connect the JobTracker using .Net ? If so, I'm afraid I
have no idea how to this. The rpc of hadoop is language dependent.

On Thu, Feb 4, 2010 at 7:18 PM, Mark N <[EMAIL PROTECTED]> wrote:

> could you please elaborate on this  ( * hint to get started  as am very new
> to hadoop? )
> So far I could succesfully read all the default and custom counters.
>
> Currently we are having a .net client.
>
> thanks in advance.
>
>
> On Thu, Feb 4, 2010 at 4:53 PM, Jeff Zhang <[EMAIL PROTECTED]> wrote:
>
> > Well, you can create a proxy of JobTracker in client side, and then you
> can
> > use the API of JobTracker to get the information of jobs. The Proxy take
> > the
> > responsibility of  communication with the Master Node.  Read the source
> > code
> > of JobClient can help you.
> >
> >
> > On Thu, Feb 4, 2010 at 6:59 PM, Mark N <[EMAIL PROTECTED]> wrote:
> >
> > > Ye currently am using jobclient to read these counters.
> > >
> > > But We are not able to use *webservices *because the jar which is used
> to
> > > read the counters from  running hadoop job  is itself a Hadoop program
> > >
> > > If we could have pure Java Api which is run without hadoop command then
> > we
> > > could return the counter variable into webservices and show in UI.
> > >
> > > Any help  or technique to show thsese counters in the UI would be
> > > appreciated  ( not necessarily using web service )
> > >
> > >
> > > I am using webservices because I am having .net VB client
> > >
> > > thanks
> > >
> > >
> > >
> > > On Wed, Feb 3, 2010 at 8:33 PM, Jeff Zhang <[EMAIL PROTECTED]> wrote:
> > >
> > > > I think you can use JobClient to get the counters in your web
> service.
> > > > If you look at the shell script bin/hadoop, you will find that
> actually
> > > > this
> > > > shell use the JobClient to get the counters.
> > > >
> > > >
> > > >
> > > > On Wed, Feb 3, 2010 at 4:34 AM, Mark N <[EMAIL PROTECTED]> wrote:
> > > >
> > > > > We have a hadoop job running and have used custom counters to track
> > >  few
> > > > > counters ( like no of successfully processed documents matching
> > certain
> > > > > conditions)
> > > > >
> > > > >
> > > > > Since we need to get this counters even while the Hadoop job is
> > running
> > > ,
> > > > > we
> > > > > wrote another Java program to read these counters
> > > > >
> > > > >
> > > > > *Counter reader  program *will do the following :
> > > > >
> > > > >
> > > > > 1)      List all the running jobs.
> > > > >
> > > > > 2)   Get the running job using Job name
> > > > >
> > > > > 2)     Get all the counter for individual running jobs
> > > > >
> > > > > 3)      Set this counters in variables.
> > > > >        We could successfully read these counters  , but since we
> need
> > > to
> > > > > show these counters to custom UI , how can we show these counters?
> > > > >
> > > > >        we looked into various options to read these counters to
> show
> > in
> > > > UI
> > > > > as following :
> > > > >
> > > > >      1. Dump these counters to database , however this may be
> > overhead
> > > > >      2. Write web service   and UI will invoke the functions from
> > these
> > > > > service to show in UI ( However since we need to run "*Counter
> reader
> > > > > program "  *with Hadoop command it might not be feasible to write
> web
> > > > > service ?   )
> > > > >
> > > > >      so the question is can we achive to read the counters using
> > simple
> > > > > Java APIs ? Does anyone have idea how does the default jobtracker
> JSP
> > > > works
> > > > > ? we wanted to built something similar to this
> > > > >
> > > > > thanks
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Nipen Mark
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Best Regards
> > > >
> > > > Jeff Zhang
> > > >
> > >
> > >
> > >
> > > --
> > > Nipen Mark
> > >
> >
> >
> >
> > --
> > Best Regards
> >
> > Jeff Zhang
> >
>
>
>
> --
> Nipen Mark
>

--
Best Regards

Jeff Zhang