Multi-NodeHadoop: NameNode and DataNode not working

0
votes

I am new student on Hadoop clusters, and I built a multi-node in the lab But I cannot start NameNode or DataNode.

After I execute start-all.sh and jps: only shows jobtracker, tasktracker, secondenamenode, jps on Master. But slaves works good with datanode and tasktracker

And when I execute stop-all.sh: it should shows: No tasttracker to stop, but it did show in jps

And this is the log file about NameNode:

1.Cannot access storage directory /app/hadoop/tmp/dfs/name 2.ERROR org.apache.hadoop.hdfs.server![enter image description here][2].namenode.FSNamesystem: FSNamesystem initialization failed. 3.org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /app/hadoop/tmp/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible. 4.org.apache.hadoop.hdfs.server.namenode.NameNode: org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /app/hadoop/tmp/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible.

And I did try the namenode -format, yet it doesn't work. Could somebody show me the way, and tell me why this happens? Lots of thanks ahead. PS: I am using hadoop1.0.3 + java1.7.0_51

1
hadoop

1 Answers

0
votes

I think you did not give permissions to data dir of tmp.data.dir.
Try bellow command to give permissions and try your start-all.sh once.

sudo chown $USER /(DIR NAME).

And try this command:

hadoop namenode -format