Check your DataNode logs under $HADOOP_HOME/logs/. It would have the reason why it did not start.
You can also issue `hadoop datanode` and watch the exceptional movie play. On Tue, Feb 1, 2011 at 4:46 AM, sharath jagannath <sharathjagann...@gmail.com> wrote: > Hey All, > > I am trying to install hadoop 0.20.2 and proceeded till daemon-start-up > bin/start-all.sh. > But I see no datanode created. > > jps output: > 43323 JobTracker > 43281 SecondaryNameNode > 43162 NameNode > 43403 Jps > 43381 TaskTracker > 19747 > > Named node log: > 2011-01-31 15:08:47,343 INFO org.apache.hadoop.ipc.Server: IPC Server > handler 6 on 9000, call addBlock(/tmp/hadoop-sjagannath/mapred/system/ > jobtracker.info, DFSClient_-462680310) from 127.0.0.1:61167: error: > java.io.IOException: File /tmp/hadoop-sjagannath/mapred/system/ > jobtracker.info could only be replicated to 0 nodes, instead of 1 > java.io.IOException: File /tmp/hadoop-sjagannath/mapred/system/ > jobtracker.info could only be replicated to 0 nodes, instead of 1 > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422) > at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953) > > > I am sure, I am doing what ever the quickstarts asks me to do. > I am following: > a. > http://hadoop-tutorial.blogspot.com/2010/11/running-hadoop-in-pseudo-distributed.html > b. http://hadoop.apache.org/common/docs/current/single_node_setup.html > > I am no sure what is going on. > I would love to clear this hurdle and get my hand dirty with the actual > work. > Please let me know what is happening. > > > Thanks, > Sharath > -- Harsh J www.harshj.com
