Namenode is not getting started

Question

I am currently running Hadoop in a Pseudo Distributed Mode. I just restarted my system and after that, I tried to start the Hadoop Namenode and Datanode. I have used both the commands.

bin/start-all.sh
bin/start-dfs.sh

None of these seems to work. Help me out and please let me know what was the error.

Answer 1

hadoop.tmp.dir in the core-site.xml is defaulted to /tmp/hadoop-${user.name} which is cleaned after every reboot. Change this to some other directory which doesn't get cleaned on reboot

Answer 2

Hi,

You can do one thing,

first delete all contents from temporary folder: rm -Rf <tmp dir>

format the namenode: bin/hadoop namenode -format

start all processes again:bin/start-all.sh