3.8.1. HDFS Ports

The following table lists the default ports used by the various HDFS services.

Service	Servers	Default Ports Used	Protocol	Description	Needs End-user Access?	Configuration Parameters
NameNode WebUI	MasterNodes (NameNode and any backup NameNodes)	50070	http	WebUI to look at current status	Yes (typically admins, Dev/Support teams)	dfs.http.address
NameNode metadata service	MasterNodes (NameNode and any backup NameNodes)	8020/9000	IPC	File system metadata operations	Yes (all clients who need to interact directly with the HDFS)	Embedded in URI specified by `fs.defaultFS`
DataNode	All Slave Nodes	50076	http	DataNode WebUI to access the status, logs, etc.	Yes (typically admins, Dev/Support teams)	dfs.datanode. http.address
DataNode	All Slave Nodes	50010		Data transfer		dfs.datanode. address
DataNode	All Slave Nodes	50020	IPC	Metadata operations	No	dfs.datanode. address
Secondasry NameNode	Secondary NameNode and any backup Secondary NameNodes	50090	http	Checkpoint for NameNode metadata	No	dfs.secondary. http.address