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hadoopportfirewallambari
Stefan Papp
Stefan Papp

Reputation: 2255

How to configure ports for hostname and localhost?

I am running a browser on the single node Hortonworks Hadoop cluster(HDP 2.3.4) on Centos 6.7:

How can I set up that localhost and <hostname> have the same port configuration?

Upvotes: 1

Views: 3817

Answers (1)

Chris Nauroth
Chris Nauroth

Reputation: 9844

This likely indicates that the NameNode HTTP server socket is bound to a single network interface, but not the loopback interface. The NameNode HTTP server address is controlled by configuration property dfs.namenode.http-address in hdfs-site.xml. Typically this specifies a host name or IP address, and this maps to a single network interface. You can tell it to bind to all network interfaces by setting property dfs.namenode.http-bind-host to 0.0.0.0 (the wildcard address, matching all network interfaces). The NameNode must be restarted for this change to take effect.

There are similar properties for other Hadoop daemons. For example, YARN has a property named yarn.resourcemanager.bind-host for controlling how the ResourceManager binds to a network interface for its RPC server.

More details are in the Apache Hadoop documentation for hdfs-default.xml and yarn-default.xml. There is also full coverage of multi-homed deployments in HDFS Support for Multihomed Networks.

Upvotes: 4

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