Hadoop Default Ports

Hadoop’s namenode and datanodes expose a bunch of TCP ports used by Hadoop’s daemons to communicate to each other or listen directly to users’ requests. These ports information are needed by both the Hadoop users and cluster administrators to write programs or configure firewalls/gateways accordingly.

A post written by Philip Zeyliger from Cloudera’s blog summarizes the default ports used by Hadoop:

Hadoop Default Ports Quick Reference.

Please note that these ports are also configuration through Hadoop’s configuration, such as the DFS and jobtracker’s ports in conf/core-site.xml conf/mapred-site.xml as used in the Hadoop Installation Tutorial.

Eric Zhiqiang Ma

Eric is interested in building high-performance and scalable distributed systems and related technologies. The views or opinions expressed here are solely Eric's own and do not necessarily represent those of any third parties.

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