Hadoop java.net.SocketException: Network is unreachable

Question

I´m executing this command in a 4 node hadoop cluster on the namenode node:

hadoop fs -ls /

But it shows an error:

ls: Failed on local exception: java.net.SocketException: 
Network is unreachable; Host Details: local host is "namenode/172.16.1.2"; 
destination host is: "namenode":9000;

core-site.xml

<configuration>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://namenode:9000</value>
    </property>
</configuration>

cat /etc/hosts:

172.16.1.2  namenode
172.16.1.3  datanode1
172.16.1.4  datanode2
172.16.1.5  datanode3

Hi. I didnt understand, more code? I just executed that command "hadoop fs -ls /" and get that error. — jUsr
– jUsr, Commented Apr 29, 2016 at 17:52

Antoniossss · Accepted Answer · 2016-04-29 20:13:14Z

1

First try to ping namenode and see what happen. If ping reaches the host, check the firewall via iptables on your current machine and namenode because it is probably blocking related traffic.

answered Apr 29, 2016 at 20:13

Antoniossss

32.7k7 gold badges67 silver badges119 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

ogarzonm · Accepted Answer · 2020-02-10 16:38:44Z

0

For me work setting JVM config

-Djava.net.preferIPv4Stack=true

answered Feb 10, 2020 at 16:38

ogarzonm

5565 silver badges12 bronze badges

Collectives™ on Stack Overflow

Hadoop java.net.SocketException: Network is unreachable

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related