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 — Sent from Mailbox for iPhone
On Thu, Apr 25, 2013 at 12:41 AM, Robert Molina <[email protected]> wrote: > 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 > Hortonworks, Inc. > Support Engineer > Phone: 408.645.7062 > <http://hortonworks.com/download/> > * > On Tue, Apr 23, 2013 at 7:17 PM, Geelong Yao <[email protected]> wrote: >> 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 >> >> <property> >> <name>data.dfs.dir</name> >> <value>/usr/hadoop/tmp/dfs/data,/sda</value> >> </property> >> The permission of /sda has been changed. >> >> [image: 内嵌图片 1] >> >> First I stop the cluster with stop-all.sh and replace the old >> hdfs-site.xml with new ones,then I restart the cluster with >> start-all.sh,but I found that datanode did not start >> >> -- >> From Good To Great >>
