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From "S.L" <simpleliving...@gmail.com>
Subject Re: Datanode not allowed to connect to the Namenode in Hadoop 2.3.0 cluster.
Date Mon, 04 Aug 2014 18:51:52 GMT
The contents are

127.0.0.1   localhost localhost.localdomain localhost4
localhost4.localdomain4
::1         localhost localhost.localdomain localhost6
localhost6.localdomain6



On Sun, Aug 3, 2014 at 11:21 PM, Ritesh Kumar Singh <
riteshoneinamillion@gmail.com> wrote:

> check the contents of '/etc/hosts' file
>
>
> On Mon, Aug 4, 2014 at 3:27 AM, S.L <simpleliving016@gmail.com> wrote:
>
>> Hi All,
>>
>> I am trying to set up a Apache Hadoop 2.3.0 cluster , I have a master and
>> three slave nodes , the slave nodes are listed in the
>> $HADOOP_HOME/etc/hadoop/slaves file and I can telnet from the slaves to the
>> Master Name node on port 9000, however when I start the datanode on any of
>> the slaves I get the following exception .
>>
>> 2014-08-03 08:04:27,952 FATAL
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for
>> block pool Block pool BP-1086620743-170.75.152.162-1407064313305 (Datanode
>> Uuid null) service to server1.dealyaft.com/170.75.152.162:9000
>> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException):
>> Datanode denied communication with namenode because hostname cannot be
>> resolved .
>>
>> The following are the contents of my core-site.xml.
>>
>> <configuration>
>>     <property>
>>         <name>fs.default.name</name>
>>         <value>hdfs://server1.mydomain.com:9000</value>
>>     </property>
>> </configuration>
>>
>> Also in my hdfs-site.xml  I am not setting any value for dfs.hosts or
>> dfs.hosts.exclude properties.
>>
>> Thanks.
>>
>
>

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