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Posted to hdfs-user@hadoop.apache.org by "Jain, Prem" <Pr...@netapp.com> on 2011/05/27 07:01:33 UTC
Can't start datanode?
One of my datanodes got hung and I had to reboot and restart the
datanode & tasktracker. However the datanode fails to start with the
following error message.
Thanks in advance.
[root@hadoop20 init.d]# ./hadoop-0.20-datanode start
Starting Hadoop datanode daemon (hadoop-datanode): starting datanode,
logging to /usr/lib/hadoop-0.20/logs/hadoop-hadoop-datanode-hadoop20.out
datanode dead but pid file exists [ OK ]
[root@hadoop20 init.d]#
Re: Can't start datanode?
Posted by Harsh J <ha...@cloudera.com>.
That error does not seem helpful enough for us to figure out why the
DN does not start up. What do the DN's logs say?
On Fri, May 27, 2011 at 10:31 AM, Jain, Prem <Pr...@netapp.com> wrote:
> One of my datanodes got hung and I had to reboot and restart the
> datanode & tasktracker. However the datanode fails to start with the
> following error message.
>
> Thanks in advance.
>
>
>
> [root@hadoop20 init.d]# ./hadoop-0.20-datanode start
> Starting Hadoop datanode daemon (hadoop-datanode): starting datanode,
> logging to /usr/lib/hadoop-0.20/logs/hadoop-hadoop-datanode-hadoop20.out
> datanode dead but pid file exists [ OK ]
> [root@hadoop20 init.d]#
>
--
Harsh J
RE: Can't start datanode?
Posted by Stuti Awasthi <St...@persistent.co.in>.
Keeping alias in the loop
-----Original Message-----
From: Stuti Awasthi
Sent: Monday, May 30, 2011 10:56 AM
To: 'Jain, Prem'
Subject: RE: Can't start datanode?
Hi Prem,
The datanode pid file name is "hadoop-[USERNAME]-datanode.pid" and by default it is present at location /tmp directory.
Here username is the user with which you start your daemon process.
-----Original Message-----
From: Jain, Prem [mailto:Premanshu.Jain@netapp.com]
Sent: Friday, May 27, 2011 7:29 PM
To: Stuti Awasthi
Subject: RE: Can't start datanode?
Sorry, I am a novice in this Hadoop land. Where do I find the piD file ?
-----Original Message-----
From: Stuti Awasthi [mailto:Stuti_Awasthi@persistent.co.in]
Sent: Thursday, May 26, 2011 11:19 PM
To: hdfs-user@hadoop.apache.org
Subject: RE: Can't start datanode?
Hi Prem,
Try to remove the pid file and again try to start datanode and
tasktracker. If this not work please post the logs here.
-----Original Message-----
From: Jain, Prem [mailto:Premanshu.Jain@netapp.com]
Sent: Friday, May 27, 2011 10:32 AM
To: hdfs-user@hadoop.apache.org
Subject: Can't start datanode?
One of my datanodes got hung and I had to reboot and restart the
datanode & tasktracker. However the datanode fails to start with the
following error message.
Thanks in advance.
[root@hadoop20 init.d]# ./hadoop-0.20-datanode start
Starting Hadoop datanode daemon (hadoop-datanode): starting datanode,
logging to /usr/lib/hadoop-0.20/logs/hadoop-hadoop-datanode-hadoop20.out
datanode dead but pid file exists [ OK ]
[root@hadoop20 init.d]#
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RE: Can't start datanode?
Posted by Stuti Awasthi <St...@persistent.co.in>.
Hi Prem,
Try to remove the pid file and again try to start datanode and tasktracker. If this not work please post the logs here.
-----Original Message-----
From: Jain, Prem [mailto:Premanshu.Jain@netapp.com]
Sent: Friday, May 27, 2011 10:32 AM
To: hdfs-user@hadoop.apache.org
Subject: Can't start datanode?
One of my datanodes got hung and I had to reboot and restart the
datanode & tasktracker. However the datanode fails to start with the
following error message.
Thanks in advance.
[root@hadoop20 init.d]# ./hadoop-0.20-datanode start
Starting Hadoop datanode daemon (hadoop-datanode): starting datanode,
logging to /usr/lib/hadoop-0.20/logs/hadoop-hadoop-datanode-hadoop20.out
datanode dead but pid file exists [ OK ]
[root@hadoop20 init.d]#
DISCLAIMER
==========
This e-mail may contain privileged and confidential information which is the property of Persistent Systems Ltd. It is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, you are not authorized to read, retain, copy, print, distribute or use this message. If you have received this communication in error, please notify the sender and delete all copies of this message. Persistent Systems Ltd. does not accept any liability for virus infected mails.