Amazon Elastic MapReduce
Developer Guide (API Version 2009-03-31)
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View Web Interfaces on the Cluster (Hadoop 2.x)

Hadoop publishes web interfaces that display status about the cluster. These web interfaces are hosted on the master node of the cluster. You can view these web interfaces by using SSH to create a tunnel to the master node and configuring a SOCKS proxy so your browser can view websites hosted on the master node using the SSH tunnel. For more information, see Connect to the Cluster.

The web user interfaces for Hadoop are located at the URLs in the following table, where master-public-dns-name is the public DNS name of the master node and slave-public-dns-name is the public DNS name of a core or task node in the cluster. For information about how to locate the public DNS name of the master node for a cluster, see Connect to the Master Node Using SSH.

Name of InterfaceURL
ResourceManager http://master-public-dns-name:9026/
NameNode http://master-public-dns-name:9101/
NodeManager http://slave-public-dns-name:9035/

To relocate these web interfaces, edit conf/hdfs-site.xml.

To view the ResourceManager web interface

  • To access the ResourceManager web interface running on the master node, open http://master-public-dns-name:9026/. This web interface is hosted on the master node of the cluster. You can access the web interface by using SSH to create a tunnel to the master node and configuring a SOCKS proxy so your browser can view websites hosted on the master node. For more information, see Connect to the Cluster.

To view the HDFS NameNode web interface

  • To access the HDFS NameNode web interface running on the master node, open http://master-public-dns-name:9101/. This web interface is hosted on the master node of the cluster. You can access the web interface by using SSH to create a tunnel to the master node and configuring a SOCKS proxy so your browser can view websites hosted on the master node. For more information, see Connect to the Cluster.