Data node process not starting up

[#1]

Even I have right permission my data node not starting up. Gives following error :(Connection failed: [Errno 111] Connection refused to 0.0.0.0:50010)

[root@ip pig]# cd /hadoop/hdfs/data

[root@ip hdfs]# ls -lrt

total 0

drwxr-x---. 3 hdfs hadoop 20 Apr 5 10:54 data

drwxr-xr-x. 4 hdfs hadoop 63 Apr 9 14:08 namenode

drwxr-xr-x. 3 hdfs hadoop 38 Apr 9 14:16 namesecondary

Just want to add .. last time when the everything was running i did floowing..

added the mapred user to HDFS group and given him rwx permission on / directory... can this be a reason of failure?

Just to add Not only datanode everything else is not running now.. is there any way to know what may have gone wrong?

[#2]

@Amit Sharma

Can you check if iptables and selinux is stop.

[#3]

how to do that can you please help me.

[#4]

Hi, Can anyone help me please?

[#5]

disable iptables

http://www.cyberciti.biz/faq/turn-on-turn-off-firewall-in-linux/

disable selinux

http://www.crypt.gen.nz/selinux/disable_selinux.html

[#6]

Commands doesn't seems to give answer.

[#7]

@Amit Sharma

Follow this personal documents substitute the names accordingly

[#8]

@Amit Sharma

Have you tried the above solutions ?

[#9]

It is not working... looks like all of my commands are failing.. non of them are able to perform task here is the attached output of commnds I ran. errors.txt

[#10]

Looks like I have disabled both of the things firewall and selinux ...still no luck.

[root@ip-xxxxxxxx ec2-user]# systemctl status firewalld.service

● firewalld.service

Loaded: not-found (Reason: No such file or directory)

Active: inactive (dead)

[root@ip-xx-xx-xx-xx ec2-user]# sestatus SELinux status: disabled

is there any logs or something which can help?