hadoop java.io.IOException: while running namenode -format
directory, hadoop, ioexception, java-io
Solution
try with sudo (I realize you changed permissions) but I would still try sudo and check if that resolves the problem.
Problem
I ran namenode -format.This is my output. I tried changing the file permissions chmod 777 hadoop. I believe this line is the error ERROR namenode.NameNode: java.io.IOException: Cannot create directory /your/path/to/hadoop/tmp/dir/hadoop-hadoop/dfs/name/current ``` adoop@alexander-desktop:/usr/local/hadoop/bin$ ./hadoop namenode -format 12/07/03 17:03:56 INFO namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = alexander-desktop/127.0.1.1 STARTUP_MSG: args = [-format] STARTUP_MSG: version = 0.20.2 STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010 ************************************************************/ 12/07/03 17:03:56 INFO namenode.FSNamesystem: fsOwner=hadoop,hadoop 12/07/03 17:03:56 INFO namenode.FSNamesystem: supergroup=supergroup 12/07/03 17:03:56 INFO namenode.FSNamesystem: isPermissionEnabled=true 12/07/03 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$StorageDirectory.clearDirectory(Storage.java:295) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1086) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1110) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:856) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965) 12/07/03 17:03:56 INFO namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at alexander-desktop/127.0.1.1 hadoop@alexander-desktop:/usr/local$ sudo hadoop/bin/hadoop namenode -format sudo: /etc/sudoers is mode 0777, should be 0440 sudo: no valid sudoers sources found, quitting ```