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From Azuryy Yu <azury...@gmail.com>
Subject Re: Can't list files in a federation of HDFS
Date Thu, 05 Mar 2015 06:13:21 GMT
For HDFS federation,  data share all datanodes, but namespace is separate,
so did you write some data on hadoop-coc-2 namespace?  you don't need to
login hadoop-coc-2 then write data, just config a new client, which connect
to hadoop-coc-2 for write.



On Tue, Mar 3, 2015 at 6:20 PM, xeonmailinglist <xeonmailinglist@gmail.com>
wrote:

>  Hi,
>
> I have configured in 2 hosts (hadooop-coc-1, and hadoop-coc-2) a
> federation of HDFS. In the configuration, I have set a namespace in each
> host, and a single data node (see image). The service is running properly.
> You can check the output of the jps commands in [1].
>
> The strange part is that, when I list the files, they do not appear in
> hadoop-coc-2. You can check the output in [2]. Why this happens?
>
> [image: hdfsfederation]
>
> [1]: jps output
>
> xubuntu@hadoop-coc-1:~/Programs/hadoop$ jps
> 21538 NameNode
> 21773 DataNode
>
> xubuntu@hadoop-coc-2:~/Programs/hadoop$ jps
> 2342 NameNode
>
> [2]: hdfs dfs -ls / output
>
> xubuntu@hadoop-coc-1:~/Programs/hadoop$ hdfs dfs -ls /
> Java HotSpot(TM) Client VM warning: You have loaded library /home/xubuntu/Programs/hadoop-2.6.0/lib/native/libhadoop.so
which might have disabled stack guard. The VM will try to fix the stack guard now.
> It's highly recommended that you fix the library with 'execstack -c <libfile>',
or link it with '-z noexecstack'.
> 15/03/03 05:09:04 WARN util.NativeCodeLoader: Unable to load native-hadoop library for
your platform... using builtin-java classes where applicable
> Found 1 items
> drwxr-xr-x   - xubuntu supergroup          0 2015-03-03 04:47 /input1
>
> xubuntu@hadoop-coc-2:~/Programs/hadoop$ hdfs dfs -ls /
> Java HotSpot(TM) Client VM warning: You have loaded library /home/xubuntu/Programs/hadoop-2.6.0/lib/native/libhadoop.so
which might have disabled stack guard. The VM will try to fix the stack guard now.
> It's highly recommended that you fix the library with 'execstack -c <libfile>',
or link it with '-z noexecstack'.
> 15/03/03 05:09:07 WARN util.NativeCodeLoader: Unable to load native-hadoop library for
your platform... using builtin-java classes where applicable
>
> ‚Äč
>
> --
> --
>
>

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