8020 failed on connection exception java net ConnectException Connection refused For more details see http wiki apache org hadoop ConnectionRefused

Question

Hi Team,

I am getting below error in hadoop namenode.

8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused

Please help me to resolve this error.

Thanks in advance!!!!

Answer 1

Hi@Bhavesh, 

You got connection refused. So, there may be lots of reason behind this. But you can troubleshoot step by step.

• Stop the service.

• Check properties in configuration files like core-site.xml, hdfs-site.xml, hadoop-env.sh file.

• Write your namenode IP in /etc/hosts file.

• Format namenode.

• Stop firewall.

• Start your service again.

Follow the above steps one by one. If it will not work, then share your configuration file.

Thank You