Have you added these properties in your hdfs-site.xml file :
<property>
<name>dfs.name.dir</name>
<value>/hadoop/hdfs/name</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>/hadoop/hdfs/data</value>
</property>
<property>
If not please do that. The values of these properties default to the /tmp
directory which gets emptied at each reboot and you end up loosing your
data and metadata.
HTH
Warm Regards,
Tariq
https://mtariq.jux.com/
cloudfront.blogspot.com
On Wed, Mar 20, 2013 at 5:29 PM, oualid ait wafli <oualid.aitwa...@gmail.com
> wrote:
> Hi,
>
> I was using Hadoop 1.0.4 in a single-node mode and everything was working
> fine.But then I had to restart my computer because of some reason.And now
> when I am trying to start Namenode and Datanode I can find only Datanode
> running.Could anyone tell me the possible reason of this problem??Or am I
> doing something wrong?? I tried both bin/start-all.sh and bin/start-dfs.sh.
>
> . Many thanks in advance
>
