question Re: Failed to format Namenode in Support Questions https://community.cloudera.com/t5/Support-Questions/Failed-to-format-Namenode/m-p/360249#M238357 <P>OK I solved it. Basically the permissions to the following datanode drives on all my three machines had to be made <STRONG>"sudo chown -R&nbsp; hdfs:hadoop"</STRONG></P><P>&nbsp;</P><P>/media/sanjay/hdd02</P><P>/media/sanjay/hdd02</P><P>&nbsp;</P><P>&nbsp;</P> Sat, 31 Dec 2022 00:11:07 GMT sanjaysubs 2022-12-31T00:11:07Z Failed to format Namenode https://community.cloudera.com/t5/Support-Questions/Failed-to-format-Namenode/m-p/360248#M238356 <P>I got CM up and running and want to add the HDFS service. Keep getting this error. In fact I went to the linux disk and in desperation made chmod -R 755 to the root namenode folder. Still get this error</P><P>&nbsp;</P><P>java.io.IOException: Cannot create directory /media/sanjay/hdd02/dfs/nn/current<BR />at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:416)<BR />at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:579)<BR />at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:601)<BR />at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:173)<BR />at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1169)<BR />at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1610)<BR />at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1720)<BR />2022-12-30 11:51:27,073 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: Failed to start namenode.<BR />java.io.IOException: Cannot create directory /media/sanjay/hdd02/dfs/nn/current<BR />at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:416)<BR />at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:579)<BR />at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:601)<BR />at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:173)<BR />at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1169)<BR />at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1610)<BR />at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1720)<BR />2022-12-30 11:51:27,074 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1: java.io.IOException: Cannot create directory /media/sanjay/hdd02/dfs/nn/current<BR />2022-12-30 11:51:27,076 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG:<BR />/************************************************************<BR />SHUTDOWN_MSG: Shutting down NameNode at hp8300one/10.0.0.3<BR />************************************************************/</P> Fri, 30 Dec 2022 20:31:37 GMT https://community.cloudera.com/t5/Support-Questions/Failed-to-format-Namenode/m-p/360248#M238356 sanjaysubs 2022-12-30T20:31:37Z Re: Failed to format Namenode https://community.cloudera.com/t5/Support-Questions/Failed-to-format-Namenode/m-p/360249#M238357 <P>OK I solved it. Basically the permissions to the following datanode drives on all my three machines had to be made <STRONG>"sudo chown -R&nbsp; hdfs:hadoop"</STRONG></P><P>&nbsp;</P><P>/media/sanjay/hdd02</P><P>/media/sanjay/hdd02</P><P>&nbsp;</P><P>&nbsp;</P> Sat, 31 Dec 2022 00:11:07 GMT https://community.cloudera.com/t5/Support-Questions/Failed-to-format-Namenode/m-p/360249#M238357 sanjaysubs 2022-12-31T00:11:07Z