I have already give full permission for that dir.I think this maybe caused by
reformatting the NN.this will lead to different Id of NN and DN
—
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On Thu, Apr 25, 2013 at 12:41 AM, Robert Molina
wrote:
> Hi Geelong,
> What's the ownership and permissions on /usr/hadoop
Did you end up reformatting the NameNode? Thats one reason why DNs will
refuse to work. You need to clear out the dfs.data.dir directories for it
to work again. Note that you shouldn't reformat the NN ever, unless it is
your intention to wipe away all data and begin all over again.
On Wed, Apr 24
Hi Geelong,
What's the ownership and permissions on /usr/hadoop/tmp/dfs/data? If I
recall correctly, I believe it should be hdfs:hadoop, where the owner has
full permissions and the group can read and execute. Does /var/log for the
datanode show any errors?
Regards,
Robert
*
Robert Molina
Hor
Hi
Sorry to interrupt you.But nobody answer my question in Hadoop maillist.
I have met a issue after I change the content of hdfs-site.xml to add
another dfs.data.dir in my cluster. /usr/hadoop/tmp/dfs/data is the default
value, /sda is the new one
data.dfs.dir
/usr/hadoop/tmp/df
