You have not given namenode uri in /etc/hosts file , thus it can't
resolve it to ipaddress and your namenode would also be not started.
Preferable practice is to start your cluster through start-dfs.sh
command, it implicitly starts first namenode and then all its datanodes.
Also make sure you have given ipaddress in salve file, if not then also
make entry for hostnames in /etc/hosts file
BR,
Satyam
On 08/05/2014 12:21 AM, S.L wrote:
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
<riteshoneinamill...@gmail.com <mailto:riteshoneinamill...@gmail.com>>
wrote:
check the contents of '/etc/hosts' file
On Mon, Aug 4, 2014 at 3:27 AM, S.L <simpleliving...@gmail.com
<mailto:simpleliving...@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
<http://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 <http://fs.default.name></name>
<value>hdfs://server1.mydomain.com:9000
<http://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.
