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Date: Mon, 22 Apr 2013 08:02:48 -0700
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 <CALte62zPhjHa4QPWQsGahN3i28EYQOg2=pXLo1OTgetSSxvvhA@mail.gmail.com>
Subject: Re: Cannot communicate
From: Ted Yu <yuzhihong@gmail.com>
To: hdfs-dev@hadoop.apache.org
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The exception was due to incompatible RPC versions between Apache maven
artifacts and CDH4.

I suggest you build the project with same hadoop version as in your cluster.

On Mon, Apr 22, 2013 at 7:50 AM, Kevin Burton <rkevinburton@charter.net>wrote:

> I am relatively new to Hadoop and am working through a Manning publication
> "Hadoop in Action". One of the first program in the book (page 44) gives me
> a Java exception: org.apache.hadoop.ipc.RemoteException: Server IPC version
> 7 cannot communicate with client version 3.
>
> My Hadoop distribution is CDH4. The Java Maven project takes its
> dependency from Apache. The exception comes from a line involving the
> "Configuration" class.
>
> Any idea on how to avoid this exception?

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