Error while starting hadoop daemons

Question

I am new to hadoop as well as ubuntu and trying to install Hadoop 2.2.0 in (Ubuntu) on my system. When I tried to start the daemons using start-all.sh or start-dfs.sh, it throws an error saying "Command not found". I have issued this command as an user created under the hadoop group only.

> hduser@nitk-OptiPlex-9010:~/hadoop-2.2.0/sbin$ start-all.sh
> start-all.sh: command not found

Can someone please help me out to resolve this issue?

Also when I tried modifying the core-site, hdfs-site xml files under etc/hadoop folder, core-site.xml~, hdfs-site.xml~ files were created (New files with a tilde symbol at the end of their names got created). I deleted those new files created. Is this creating a problem?

Answer 1

write ./start-all.sh

If it says start-all.sh: command not found

That means its not yet into executable mode. Change it to executable via chmod

chmod +x *.sh

Answer 2

Error: command not found

$ /home/user/Documents/installed/hadoop/sbin/start-all.sh
 start-all.sh command not found

Solution: Go to the Hadoop install location and then run:

$ cd /home/user/Documents/installed/hadoop/sbin
$ ./start-all.sh 
$ jps

12373 Jps
11823 SecondaryNameNode
11643 DataNode
12278 NodeManager
11974 ResourceManager
11499 NameNode

Answer 3

Follow below steps
      ==> Go to hadoop home directory: cd /usr/local/hadoop/
      ==> Start the process of datanodes and namenodes : bin/hadoop namenode -format
==> Start deamons : sbin/start-dfs.sh (start-all.sh is depreciated)

Hope that helps you :)

Answer 4

I guess the right way to start deamons is as follows:

1- Using the command line you go to the directory of hadoop

cd /usr/local/hadoop/

2- Then you start deamons in this way:

bin/start-all.sh

But I suggest you to delete first all the datanodes and namenode files to start the processes with a clean environment in addition to formatting the namenode

bin/hadoop namenode -format

Hope that helps you !!!!

Answer 5

Try this: 1. First run this command chmod +x start-dfs.sh 2. then run /.start-dfs.sh