How to check the status of the namenode in Hadoop?

To check the status of the NameNode in Hadoop, you can use the following command:

1. Log in to the main node of the Hadoop cluster.
2. Execute the following command to check the status of the NameNode:

hadoop dfsadmin -report

This command will display detailed information about the NameNode, including capacity, used space, and remaining space.

Additionally, you can also check the status of the NameNode through a web interface.

1. Enter the IP address and port number of the NameNode in the web browser, which is typically 50070.
2. Once you access the web interface, you can view the overview information of the NameNode, such as cluster status, number of nodes, storage capacity, and more. You can also check detailed information about the file system and running jobs.

You can easily check the status of the NameNode in Hadoop through the above method.