Database Reference
In-Depth Information
Table 3.1
Default Ports Used by the Hadoop Distributed File System
(HDFS)
Service
Servers
Default
Ports
Used
Protocol Description
NameNode
web UI
Master nodes
(NameNode and
any backup
NameNodes)
50070 HTTP
Web UI to look at
current status of
HDFS, explore
file system
50470 HTTPS
Secure HTTP
service
NameNode
metadata
service
8020/
9000
IPC
File system
metadata
operations
DataNode
All slave nodes
50075 HTTP
DataNode web
UI to access the
status, logs, and
so on
50475 HTTPS
Secure HTTP
service
50010
Data transfer
50020 IPC
Metadata
operations
Secondary
NameNode
Secondary
NameNode and
any backup
secondary
NameNode
50090 HTTP
Checkpoint for
NameNode
metadata
