@Florin Miron This error might arise if you do not start namenode as hdfs user. Actually, you are trying to run it as root user but the file /hadoop/hdfs/namenode/in_use.lock is owned by hdfs user. Do not use sudo to start hadoop processess. Try to start it without sudo. Try this: su -l hdfs -c "/usr/hdp/current/hadoop-hdfs-namenode/../hadoop/sbin/hadoop-daemon.sh start namenode" Can you try that and revert ... View more

@Florin Miron, Can you kindly accept the answer. This will be very useful for the community users. Thanks, Aditya ... View more