Hi Ranjan,
Whatever code is being passed as closure to spark operations like map,
flatmap, filter etc are part of task
All others are in driver.
Thanks,
Sourav
On Mon, Mar 10, 2014 at 12:03 PM, Sen, Ranjan [USA] <sen_ran...@bah.com>wrote:
> Hi Patrick
>
> How do I know which part of the code is in the driver and which in task?
> The structure of my code is as below-
>
> Š
>
> Static boolean done=false;
> Š
>
> Public static void main(..
>
> ..
>
> JavaRDD<String> lines = ..
>
> ..
>
> While (!done) {
>
> ..
> While (..) {
>
> JavaPairRDD<Integer, List<Integer>> labs1 = labs.map (new PairFunction<Š );
>
> !! Here I have System.out.println (A)
>
> } // inner while
>
> !! Here I have System.out.println (B)
>
>
> If (Š) {
> Done = true;
>
> !! Also here some System.out.println (C)
>
> Break;
> }
>
> Else {
>
> If (Š) {
>
> !! More System.out.println (D)
>
>
> labs = labs.map(Š) ;
>
> }
> }
>
> } // outer while
>
> !! Even more System.out.println (E)
>
> } // main
>
> } //class
>
> I get the console outputs on the master for (B) and (E). I do not see any
> stdout in the worker node. I find the stdout and stderr in the
> <spark>/work/<appid>/0/. I see output
> in stderr but not in stdout.
>
> I do get all the outputs on the console when I run it in local mode.
>
> Sorry I am new and may be asking some naïve question but it is really
> confusing to me. Thanks for your help.
>
> Ranjan
>
> On 3/9/14, 10:50 PM, "Patrick Wendell" <pwend...@gmail.com> wrote:
>
> >Hey Sen,
> >
> >Is your code in the driver code or inside one of the tasks?
> >
> >If it's in the tasks, the place you would expect these to be is in
> >stdout file under <spark>/<appid>/work/[stdout/stderr]. Are you seeing
> >at least stderr logs in that folder? If not then the tasks might not
> >be running on the workers machines. If you see stderr but not stdout
> >that's a bit of a puzzler since they both go through the same
> >mechanism.
> >
> >- Patrick
> >
> >On Sun, Mar 9, 2014 at 2:32 PM, Sen, Ranjan [USA] <sen_ran...@bah.com>
> >wrote:
> >> Hi
> >> I have some System.out.println in my Java code that is working ok in a
> >>local
> >> environment. But when I run the same code on a standalone mode in a EC2
> >> cluster I do not see them at the worker stdout (in the worker node under
> >> <spark location>/work ) or at the driver console. Could you help me
> >> understand how do I troubleshoot?
> >>
> >> Thanks
> >> Ranjan
>
>
--
Sourav Chandra
Senior Software Engineer
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