I successfully connect Hadoop to an Ubuntu system. I follow the tutorial on some articles.
I am confused, why each step suggests disabling ipv6?
Is there any effect if I do not disconnect my ipv6 on my system?
Can anyone answer it?
As stated here : Apache Hadoop is currently not supported on IPv6 networks. It has been tested and developed only for IPv4 stacks. Hadoop needs IPv4 to work, and only IPv4 clients can talk to the cluster. If your organization is switching to IPv6 only, you will run into problems.
Take a look at HADOOP-3437 and HADOOP-6056 to understand why you need to disable IPv6 to get Hadoop to work.