Writing to HDFS could only be replicated to 0 nodes instead of minReplication (=1)

Question

I have 3 data nodes running, while running a job i am getting the following given below error ,

java.io.IOException: File /user/ashsshar/olhcache/load

Answer 1

1.Stop all Hadoop daemons

for x in `cd /etc/init.d ; ls hadoop*` ; do sudo service $x stop ; done

2.Remove all files from /var/lib/hadoop-hdfs/cache/hdfs/dfs/name

Eg: devan@Devan-PC:~$ sudo rm -r /var/lib/hadoop-hdfs/cache/

3.Format Namenode

sudo -u hdfs hdfs namenode -format

4.Start all Hadoop daemons

for x in `cd /etc/init.d ; ls hadoop*` ; do sudo service $x start ; done

Stop All Hadoop Service