Hadoop: namenode -format error "java.io.IOException"

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When I run ./hadoop namenode -format command, I get this error:

26/11/18 17:03:56 ERROR namenode.NameNode: java.io.IOException: Cannot create directory /your/path/to/hadoop/tmp/dir/hadoop-hadoop/dfs/name/current
    at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:295)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1086)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1110)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:856)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965)
sudo: no valid sudoers sources found, quitting

How to solve this?

Nov 26, 2018 in Big Data Hadoop by slayer
• 29,050 points
112 views

1 answer to this question.

0 votes

Run the command as sudo or add the current user as sudoer , like this:

sudo usermod -a -G sudo <username>

and then run the command.

answered Nov 26, 2018 by Omkar
• 67,200 points

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