Default Namenode port of HDFS is 50070.But I have come across at some places 8020 or 9000

Question

When I setup the hadoop cluster, I read the namenode runs on 50070 and I set up accordingly and it\'s running fine.

But in some books I have come across name node ad

Answer 1

The default address of namenode web UI is http://localhost:50070/. You can open this address in your browser and check the namenode information.

The default address of namenode server is hdfs://localhost:8020/. You can connect to it to access HDFS by HDFS api. The is the real service address.

Answer 2

Default port for namenode is 9870 on hadoop 3.x. Please refer to https://hadoop.apache.org/docs/r3.0.0/ for details.

Answer 3

50070 is default UI port of Namenode for http. for https its 50470. 9000 is the IPC port(Inter Process Communicator). If you click on localhost:50070, you can see namenode configurations with an overview 9000 (active) and on localhost:9000 you will get message: "It looks like you are making an HTTP request to a Hadoop IPC port. This is not the correct port for the web interface on this daemon." required for file system metadata operations.

Answer 4

There are other HTTP ports that would run in server for monitoring. Example: 50070, 8088, 9870, 9864, 9868, 16010, 16030

Hadoop IPC(Inter Process Communicator) ports (Eg. 9000) cannot be accessed through your web browser.

You can find the ports that can be accessed in browser by the following command:

lsof -i -P -n | grep LISTEN

For example, the ports in my server were:

Hadoop Cluster - http://server-name:8088/cluster

Hadoop NameNode/DFS Health - http://server-name:9870/dfshealth.html#tab-overview

Hadoop DataNode - http://server-name:9864/datanode.html

Hadoop Status - http://server-name:9868/status.html

HBase Master Status - http://server-name:16010/master-status

HBase Region server - http://server-name:16030/rs-status