Re: Cannot communicate

[rkevinburton]

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  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 
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?

Re: Cannot communicate

[rkevinburton]

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 
   



Thanks,
+Vinod Kumar Vavilapalli
Hortonworks Inc.
http://hortonworks.com/    



On Apr 22, 2013, at 9:58 AM, rkevinbur...@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    
 > 
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 
 
  
 
>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?