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From Devaraj k <devara...@huawei.com>
Subject RE: Multiple data node and namenode ?
Date Thu, 25 Jul 2013 07:44:28 GMT
I could see two data node's log files. But the modified times for both files are different
with the difference as 21 mins. I doubt whether they are really running. By any chance have
you updated the host name in the machine and then restarted the data node?

Could you check with 'ps -ef | grep datanode' shell command to know how many datanode processes
are running at this moment.

Thanks
Devaraj k


-----Original Message-----
From: Manish Bhoge [mailto:manishbhoge@rocketmail.com] 
Sent: 25 July 2013 12:56
To: common-user@hadoop.apache.org
Subject: Re: Multiple data node and namenode ?

Unfortunately, I don't have JPS installed. But as you can see it shows 2 data nodes.
 hadoop-hdfs-datanode-INBEDU011997A.log 243358 bytes Jul 25, 2013 2:29:15 AM hadoop-hdfs-datanode-myhost-1.log
1893692 bytes Jul 25, 2013 2:50:42 AM


is it because i have given 3 directory under dfs-data.dir in hdfs-site.xml?


________________________________
 From: Devaraj k <devaraj.k@huawei.com>
To: "common-user@hadoop.apache.org" <common-user@hadoop.apache.org>
Sent: Thursday, 25 July 2013 12:41 PM
Subject: RE: Multiple data node and namenode ?
 

Hi Manish,

  Can you check how many data node processes are running really in the machine using the
command 'jps' or 'ps'. 

Thanks
Devaraj k


-----Original Message-----
From: Manish Bhoge [mailto:manishbhoge@rocketmail.com] 
Sent: 25 July 2013 12:29
To: common-user@hadoop.apache.org
Subject: Multiple data node and namenode ?

I am configuring cluster and starting with first machine. So i have configured the core-site,
hdfs-site and mapred-site to run hadoop only on 1 machine. But somehow i am getting 2 copies
of data node, namenode and secondary namenode. Not able to figure out why ?



SecurityAuth-hdfs.audit 0 bytes Jul 17, 2013 4:34:56 AM hadoop-hdfs-datanode-INBEDU011997A.log
243358 bytes Jul 25, 2013 2:29:15 AM hadoop-hdfs-datanode-myhost-1.log 1893692 bytes Jul 25,
2013 2:50:42 AM hadoop-hdfs-namenode-INBEDU011997A.log 19545397 bytes Jul 25, 2013 2:50:40
AM hadoop-hdfs-namenode-myhost-1.log 2438271 bytes Jul 25, 2013 2:48:57 AM hadoop-hdfs-secondarynamenode-INBEDU011997A.log
4061047 bytes Jul 25, 2013 2:30:10 AM hadoop-hdfs-secondarynamenode-myhost-1.log 9707957 bytes
Jul 25, 2013 2:46:18 AM

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