Namenode not getting started

Question

I was using Hadoop in a pseudo-distributed mode and everything was working fine. But then I had to restart my computer because of some reason. And now when I am trying to st

Answer 1

For me the following worked after I changed the directory of the namenode and datanode in hdfs-site.xml

-- before executing the following steps stop all services with stop-all.sh or in my case I used the stop-dfs.sh to stop the dfs

1. On the new configured directory, for every node (namenode and datanode), delete every folder/files inside it (in my case a 'current' directory).
2. delete the Hadoop temporary directory: $rm -rf /tmp/haddop-$USER
3. format the Namenode: hadoop/bin/hdfs namenode -format
4. start-dfs.sh

After I followed those steps my namenode and datanodes were alive using the new configured directory.