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From "Aaron T. Myers" <...@cloudera.com>
Subject Re: Cannot communicate
Date Wed, 24 Apr 2013 02:19:11 GMT
Hi Kevin,

Since it seems like this is a CDH-specific question, I recommend you email
cdh-user@cloudera.org where you should be able to get some help with this.


--
Aaron T. Myers
Software Engineer, Cloudera


On Mon, Apr 22, 2013 at 10:33 AM, <rkevinburton@charter.net> wrote:

>
> I am on a Ubuntu server. When I go to the link you provided there is a
> hyperlink for Ubuntu but it seems like it is the main site. I tried
> searching for hadoop native but didn't get any useful results. Is there
> some other package that I should install using apt-get?
>
> On Mon, Apr 22, 2013 at 12:02 PM, Vinod Kumar Vavilapalli wrote:
>
>  >
> It means what it says: that hadoop native library isn't available for some
> reason. See http://hadoop.apache.org/docs/**stable/native_libraries.html<http://hadoop.apache.org/docs/stable/native_libraries.html><
> http://hadoop.apache.org/**docs/stable/native_libraries.**html<http://hadoop.apache.org/docs/stable/native_libraries.html>>
>   <http://hadoop.apache.org/**docs/stable/native_libraries.**html<http://hadoop.apache.org/docs/stable/native_libraries.html>
> >
>
>
> Thanks,
> +Vinod Kumar Vavilapalli
> Hortonworks Inc.
> http://hortonworks.com/ <http://hortonworks.com/>   <
> http://hortonworks.com/>
>
> On Apr 22, 2013, at 9:58 AM, rkevinburton@charter.net<javascript:parent.wgMail.
> **openComposeWindow('rkevinburto**n@charter.net <rkevinburton@charter.net>')>
>   <javascript:parent.wgMail.**openComposeWindow('rkevinburto**
> n@charter.net <rkevinburton@charter.net>')>  wrote:
>
>  I was able to add the appropriate Maven dependencies and it "works". I
>> have one last question on this thread. With the added dependencies I am
>> getting the warning:
>>
>> 13/04/22 11:53:18 WARN util.NativeCodeLoader: Unable to load
>> native-hadoop library for your platform... using builtin-java classes where
>> applicable
>> What does this mean? Can it be avoided?
>>
>> Thanks again.
>>
>>
>> On Mon, Apr 22, 2013 at 11:17 AM, Kevin Burton wrote:
>>
>>  What dependency for the Maven project should I use?
>>>
>>> On Apr 22, 2013, at 10:02 AM, Ted Yu <yuzhihong@gmail.com<javascript:parent.wgMail.
>>> **openComposeWindow('yuzhihong@**gmail.com <yuzhihong@gmail.com>')>
>>> <javascript:parent.wgMail.**openComposeWindow('yuzhihong@**gmail.com<yuzhihong@gmail.com>')>
>>> > wrote:
>>>
>>>  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<javascript:parent.wgMail.
>>>> **openComposeWindow('rkevinburto**n@charter.net<rkevinburton@charter.net>')>
>>>>   <javascript:parent.wgMail.**openComposeWindow('rkevinburto**
>>>> n@charter.net <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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