I'm installing CDH 5.5 on CentOs 6 using the Cloudera Manager.
So far everything works, but formatting the namenode and starting namenode fails with the following error message.
java.io.IOException: Cannot create directory /dfs/nn/current at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:337) at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:548) at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:569) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:148) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1041) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1479) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1606) 16/03/04 17:55:11 ERROR namenode.NameNode: Failed to start namenode.
Sat Mar 5 17:03:09 CET 2016 JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-220.127.116.11.x86_64/jre using /usr/lib/jvm/java-1.7.0-openjdk-18.104.22.168.x86_64/jre as JAVA_HOME using 5 as CDH_VERSION using /var/run/cloudera-scm-agent/process/43-hdfs-NAMENODE-format as CONF_DIR using as SECURE_USER using as SECURE_GROUP 64 Formatting using clusterid: cluster16
I'm sure it is a problem with authorization for the user cloudera-scm.
I have added the user in the sudo group (using visudo), but still no success.
Thanks for any advise.
this is serious error across lots of users getting.
some google tells me that setting permissions such as following will help, but no official word from cloudera(????)
ls -Ald /
ls -Ald /var
ls -Ald /dfs
chmod 755 /dfs
chown root:root /dfs should be verified
thanks for the reply. I see the main problem in the fact, that the installation is not complete (the formatting of the namenode is a installation step).
Thus: ls: cannot access /dfs: No such file or directory
If there would be a /dfs directory, I would have set the permission manually, but the directory is not there.
Did you find any solutions for this problem?. I'm having the same problem now. Thank you
I think you need to check if your hdfs system user (by default it is called hdfs) has permission to create /dfs/nn/current.
In the process of checking user permissions and granting the permission, I lost my ubuntu. So this time I installed both windows and ubuntu operating systems. Now I've been on working on installing cloudera manager VM on windows. Thanks
Does anyone solved the issue ? I too getting similar problem, even i tried creating the directories manually on root user and gave 755 permission. But didnt solved the problem. Also tried changing the owner to cloudera-scm, Even it didnt solved the issue. I am setting up cluster in single user mode.
Which user are you running the installer with? You don't have to create the complete directory structure manually as the installer will automatically create those; just create the top level directory/filesystem.