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Disable IPv6

Apache Hadoop is not currently supporting IPv6 networks. It has only been developed on IPv4 stacks.  Hadoop recommends IPv4 to work, and only IPv4 clients can talk to the cluster. If your organization moves to IPv6 only, you will encounter problems.

Step 10: Disable IPv6 by editing sysctl.conf file. Please add the below three lines at the end of the file. 

Step 11. After saving the commands, please reboot your machine and run the below command. It should return 1, which means IPV6 is disabled. 

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