This usually has to do (in my own limited experience) with host file / dns issues or configuration synchronization issues.
On 10/17/07 12:54 PM, "Tiger Uppercut" <[EMAIL PROTECTED]> wrote: > Hi, > > I'm using the Hadoop 0.14.1 AMI as my master node [ami-64f6130d], and > I've followed up to "test your cluster" bit of the tutorial listed > here: > > http://wiki.apache.org/lucene-hadoop/AmazonEC2 > > However, when I try to run the following command, > > $ bin/hadoop jar hadoop-*-examples.jar pi 10 10000000 > > I get an error "Failed to create file /user/root/test-mini-mr/in/part0 > on client 127.0.0.1 because this cluster has no datanodes." > > Specifically: > > org.apache.hadoop.ipc.RemoteException: java.io.IOException: Failed to > create file /user/root/test-mini-mr/in/part0 on client 127.0.0.1 > because this cluster has no datanodes. > at org.apache.hadoop.dfs.FSNamesystem.startFile(FSNamesystem.java:739) > > According to the following thread [ > http://mail-archives.apache.org/mod_mbox/lucene-hadoop-user/200706.mbox/%3C466 > [EMAIL PROTECTED] > ], I need to check my ip-addresses. > > My dynDNS settings are as follows. > > hostname: something.webhop.org > wildcard: true > service type: host with IP address > ip address: xx.yy.zz.aa > webhop: http://ec2-xx-yy-zz-aa.z-1.compute-1.amazonaws.com/ > > > > For reference, my hadoop-site.xml file is: > > <configuration> > > <property> > <name>hadoop.tmp.dir</name> > <value>/mnt/hadoop</value> > </property> > > <property> > <name>fs.default.name</name> > <value>localhost:50001</value> > </property> > > <property> > <name>mapred.job.tracker</name> > <value>localhost:50002</value> > </property> > > </configuration> > > > > Any tips would be very welcome...! > > Thanks! > > [I've also posted this to Amazon's EC2 forum.]
