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Date: Thu, 2 Feb 2012 13:00:28 +0530
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Subject: Re: reduce no response
From: Idris Ali <psychidris@gmail.com>
To: common-user@hadoop.apache.org
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Hi Jinyan,

To quickly check if it has to do with resolving the ip address, can you
check what is the hostname of the system?
A quick hack would be to rename host itself as "localhost" if you are using
cloudera's pseudo cluster hadoop for testing.

Thanks,
-Idris

On Wed, Feb 1, 2012 at 4:24 PM, Harsh J <harsh@cloudera.com> wrote:

> Jinyan,
>
> Am not sure what your problem here seems to be - the client hanging or
> the job itself hanging. Could you provide us some more information on
> what state the job is hung in, or expand on the job client hang?
> Having a jstack also helps whenever you run into a JVM hang.
>
> On Wed, Feb 1, 2012 at 3:46 PM, Jinyan Xu <Jinyan.Xu@exar.com> wrote:
> > Hi all,
> >
> > Do terasort use 4 reduce 8 map , when all maps finish reduce no response.
> >
> > Debug messages like:
> >
> > 12/02/02 01:42:47 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop sending #7126
> > 12/02/02 01:42:47 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop got value #7126
> > 12/02/02 01:42:47 DEBUG ipc.RPC: Call: getJobStatus 1
> > 12/02/02 01:42:48 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop sending #7127
> > 12/02/02 01:42:48 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop got value #7127
> > 12/02/02 01:42:48 DEBUG ipc.RPC: Call: getTaskCompletionEvents 0
> > 12/02/02 01:42:48 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop sending #7128
> > 12/02/02 01:42:48 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop got value #7128
> > 12/02/02 01:42:48 DEBUG ipc.RPC: Call: getJobStatus 1
> > 12/02/02 01:42:49 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop sending #7129
> > 12/02/02 01:42:49 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop got value #7129
> > 12/02/02 01:42:49 DEBUG ipc.RPC: Call: getTaskCompletionEvents 0
> > 12/02/02 01:42:49 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop sending #7130
> > 12/02/02 01:42:49 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop got value #7130
> > 12/02/02 01:42:49 DEBUG ipc.RPC: Call: getJobStatus 1
> > 12/02/02 01:42:50 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop sending #7131
> > 12/02/02 01:42:50 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop got value #7131
> > 12/02/02 01:42:50 DEBUG ipc.RPC: Call: getTaskCompletionEvents 1
> > 12/02/02 01:42:50 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop sending #7132
> > 12/02/02 01:42:50 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop got value #7132
> > 12/02/02 01:42:50 DEBUG ipc.RPC: Call: getJobStatus 0
> > 12/02/02 01:42:51 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop sending #7133
> > 12/02/02 01:42:51 DEBUG ipc.Client: IPC Client (47) connection to
> localhost/127.0.0.1:9001 from hadoop got value #7133
> >
> >
> > ________________________________
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>
>
>
> --
> Harsh J
> Customer Ops. Engineer
> Cloudera | http://tiny.cloudera.com/about
>

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