Hi Bejoy,
Its done now, Error log was showing namenode is not formated,
I closed all previous terminal and restarted it after formatting.
its running now.
Please suggest me that if in case it gets crashed then how do I recover it from
Secondary Namenode. how should I proceed for that
Thanks & regards
Yogesh Kumar Dhari
________________________________
From: Bejoy KS [bejoy.had...@gmail.com]
Sent: Friday, July 20, 2012 12:56 PM
To: Yogesh Kumar (WT01 - Communication and Media); hdfs-user@hadoop.apache.org
Subject: Re: NameNode fails
Hi Yogesh
Please post in the error logs/messages if you find any.
Regards
Bejoy KS
Sent from handheld, please excuse typos.
________________________________
From: <yogesh.kuma...@wipro.com>
Date: Fri, 20 Jul 2012 07:21:24 +0000
To: <hdfs-user@hadoop.apache.org>; <bejoy.had...@gmail.com>
Subject: RE: NameNode fails
Thanks Bejoy, Mohammad and Vignesh :-).
I have done the suggested by you and made thses changes. and formatted the
namenode and trying to start cluster.
but now name node is not starting :-(
hdfs-site.xml
**********************************************************
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.name.dir</name>
<value>/HADOOP/hadoop-0.20.2/hadoop_name_dirr</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>/HADOOP/hadoop-0.20.2/hadoop_data_dirr</value>
</property>
</configuration>
**************************************************************
hdfs-core.xml
**************************************************************
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://localhost:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/HADOOP/hadoop-0.20.2/hadoop_temp_dirr</value>
<description>A base for other temporary directories.</description>
</property>
</configuration>
*****************************************************************
Please suggest.
Thanks & Regards
Yogesh Kumar Dhari
________________________________
From: Mohammad Tariq [donta...@gmail.com]
Sent: Friday, July 20, 2012 12:17 PM
To: hdfs-user@hadoop.apache.org; bejoy.had...@gmail.com
Subject: Re: NameNode fails
Hi yogesh,
Do as suggested by bejoy and add the hadoop.tmp.dir in your core-site.xml
file.it<http://file.it>'s value defaults to the /tmp dir which gets emptied at
each restart so all the data is lost... also add dfs.name.dir and dfs.data.dir
properties into your hdfs-site.xml file to avoid the data loss.
On Friday, July 20, 2012, Bejoy KS
<bejoy.had...@gmail.com<mailto:bejoy.had...@gmail.com>> wrote:
> Hi Yogesh
>
> Is your dfs.name.dir pointing to /tmp dir? If so try changing that to any
> other dir . The contents of /tmp may get wiped out on OS restarts.
> Regards
> Bejoy KS
>
> Sent from handheld, please excuse typos.
> ________________________________
> From: <yogesh.kuma...@wipro.com<mailto:yogesh.kuma...@wipro.com>>
> Date: Fri, 20 Jul 2012 06:20:02 +0000
> To: <hdfs-user@hadoop.apache.org<mailto:hdfs-user@hadoop.apache.org>>
> ReplyTo: hdfs-user@hadoop.apache.org<mailto:hdfs-user@hadoop.apache.org>
> Subject: NameNode fails
> Hello All :-),
>
> I am new to Hdfs.
>
> I have installed single node hdfs and started all nodes, every nodes gets
> started and work fine.
> But when I shutdown my system or Restart it, then i try to run all nodes but
> Namenode doesn't start .
>
> to Start it i need to format the namenode and all data gets wash off :-(.
>
> Please help me and suggest me regarding this and how can I recover namenode
> from secondary name node on single node setup
>
>
> Thanks & Regards
> Yogesh Kumar Dhari
>
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Regards,
Mohammad Tariq
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