OK -- I managed to cobble together three CentOS 7 laptops, install Hadoop 3.1.0, and get all three nodes running. Good for me.
SO...what ports are required to be open on all the various nodes?
Checking http://namenode:9870 the nice "Datanode Information" page appears and shows all three nodes up and running. Additionally, running the command "hdfs dfsadmin -report" on any node shows all nodes running.
HOWEVER...checking the "Nodes of the Cluster" page at http://namenode:8088 only shows the namenode...
Should I see all the data nodes on this page as well? Wondering if I need to open some ports or if my understanding of the "Nodes of the Cluster" requires an update...
Thanks!
Here is a site which lists all the default ports in a Hadoop cluster configuration.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.