1. HDFS Ports

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

Table 10.1. HDFS Ports
Service Servers Default Ports Used Protocol Description Need End User Access? Configuration Parameters

NameNode WebUI

Master Nodes (NameNode and any back-up NameNodes) 50070 http Web UI to look at current status of HDFS, explore file system Yes (Typically admins, Dev/Support teams) dfs.http.address
50470 https Secure http service dfs.https.address

NameNode metadata service

Master Nodes (NameNode and any back-up NameNodes) 8020/9000 IPC

File system metadata operations

Yes (All clients who directly need to interact with the HDFS) Embedded in URI specified by fs.default.name

DataNode

All Slave Nodes

50075

http

DataNode WebUI to access the status, logs etc.

Yes (Typically admins, Dev/Support teams) dfs.datanode.http.address

50475

https

Secure http service

dfs.datanode.https.address

50010

Data transfer

dfs.datanode.address

50020

IPC

Metadata operations

No dfs.datanode.ipc.address
Secondary NameNode Secondary NameNode and any backup Secondary NameNode

50090

http

Checkpoint for NameNode metadata

No dfs.secondary.http.address

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