Have you copied the updated hadoop-site.xml file to the conf directory on all of your slave nodes?
On Thu, Apr 23, 2009 at 2:10 PM, jpe30 <jpotte...@gmail.com> wrote: > > Ok, I've done all of this. Set up my hosts file in Linux, setup my master > and slaves file in Hadoop and setup my hadoop-site.xml. It still does not > work. The datanode still gives me this error... > > STARTUP_MSG: host = java.net.UnknownHostException: myhost: myhost > > ...which makes me think its not reading the hadoop-site.xml file at all. > I've checked the permissions and the user has full permissions to all files > within the Hadoop directory. Any suggestions? > > > > Mithila Nagendra wrote: > > > > You should have conf/slaves file on the master node set to master, > node01, > > node02..... so on and the masters file on master set to master. Also in > > the > > /etc/hosts file get rid of 'node6' in the line 127.0.0.1 > > localhost.localdomain localhost node6 on all your nodes. Ensure that > the > > /etc/hosts file contain the same information on all nodes. Also > > hadoop-site.xml files on all nodes should have master:portno for hdfs and > > tasktracker. > > Once you do this restart hadoop. > > > > On Fri, Apr 17, 2009 at 10:04 AM, jpe30 <jpotte...@gmail.com> wrote: > > > >> > >> > >> > >> Mithila Nagendra wrote: > >> > > >> > You have to make sure that you can ssh between the nodes. Also check > >> the > >> > file hosts in /etc folder. Both the master and the slave much have > each > >> > others machines defined in it. Refer to my previous mail > >> > Mithila > >> > > >> > > >> > >> > >> I have SSH setup correctly and here is the /etc/hosts file on node6 of > >> the > >> datanodes. > >> > >> #<ip-address> <hostname.domain.org> <hostname> > >> 127.0.0.1 localhost.localdomain localhost node6 > >> 192.168.1.10 master > >> 192.168.1.1 node1 > >> 192.168.1.2 node2 > >> 192.168.1.3 node3 > >> 192.168.1.4 node4 > >> 192.168.1.5 node5 > >> 192.168.1.6 node6 > >> > >> I have the slaves file on each machine set as node1 to node6, and each > >> masters file set to master except for the master itself. Still, I keep > >> getting that same error in the datanodes... > >> -- > >> View this message in context: > >> http://www.nabble.com/Datanode-Setup-tp23064660p23101738.html > >> Sent from the Hadoop core-user mailing list archive at Nabble.com. > >> > >> > > > > > > -- > View this message in context: > http://www.nabble.com/Datanode-Setup-tp23064660p23203293.html > Sent from the Hadoop core-user mailing list archive at Nabble.com. > > -- Alpha Chapters of my book on Hadoop are available http://www.apress.com/book/view/9781430219422
