Helloo..
My namenode is running with the following exceptions and going to safemode
everytime its trying to start the datanodes.. why so ?
I deleted all the files in the HDFS.. and ran it again..!!
2011-06-07 15:02:19,467 INFO
org.apache.hadoop.hdfs.server.namenode.NameNode: STARTUP_MSG:
On 06/07/2011 10:50 AM, praveenesh kumar wrote:
The logs say
The ratio of reported blocks 0.9091 has not reached the threshold 0.9990.
Safe mode will be turned off automatically.
not enough datanodes reported in, or they are missing data
But I dnt have any data on my HDFS.. I was having some date before.. but now
I deleted all the files from HDFS..
I dnt know why datanodes are taking time to start.. I guess because of this
exception its taking more time to start.
On Tue, Jun 7, 2011 at 3:34 PM, Steve Loughran ste...@apache.org
Check two things:
1. Some of your data node is getting connected, that means password less SSH is
not working within nodes.
2. Then Clear the Dir where you data is persisted in data nodes and format the
namenode.
It should definitely work then
Cheers,
Jagaran
1. Some of your data node is getting connected, that means password less
SSH is
not working within nodes.
So you mean that passwordless SSH should be there among datanodes also.
In hadoop we used to do password less SSH from namenode to data nodes
Do we have to do passwordless ssh among
Sorry I mean Some of your data nodes are not getting connected
From: jagaran das jagaran_...@yahoo.co.in
To: common-user@hadoop.apache.org
Sent: Tue, 7 June, 2011 10:45:59 AM
Subject: Re: NameNode is starting with exceptions whenever its trying to start
Sorry I mean Some of your data nodes are not getting connected..
So are you sticking with your solution that you are saying to me.. to go for
passwordless ssh for all datanodes..
because for my hadoop.. all datanodes are running fine
On Tue, Jun 7, 2011 at 11:32 PM, jagaran das
Yes Correct
Password less SSH between your name node and some of your datanode is not
working
From: praveenesh kumar praveen...@gmail.com
To: common-user@hadoop.apache.org
Sent: Tue, 7 June, 2011 10:56:08 AM
Subject: Re: NameNode is starting with exceptions
Cleaning data from data dir of datanode and formatting the name node may help
you
From: praveenesh kumar praveen...@gmail.com
To: common-user@hadoop.apache.org
Sent: Tue, 7 June, 2011 11:05:03 AM
Subject: Re: NameNode is starting with exceptions whenever its
Dude.. passwordless ssh between my namenode and datanode is working all
fine...!!!
My question is ---
*Are you talking about passwordless ssh between datanodes *
**
or
*Are you talking about password less ssh between datanodes and namenode *
**
Because if you are
how shall I clean my data dir ???
Cleaning data dir .. u mean to say is deleting all files from hdfs ???..
is there any special command to clean all the datanodes in one step ???
On Tue, Jun 7, 2011 at 11:46 PM, jagaran das jagaran_...@yahoo.co.inwrote:
Cleaning data from data dir of datanode
I mean removing rm -rf * in the datanode dir
See this are debugging step that i followed
From: praveenesh kumar praveen...@gmail.com
To: common-user@hadoop.apache.org
Sent: Tue, 7 June, 2011 11:19:50 AM
Subject: Re: NameNode is starting with exceptions
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