The following table lists the default ports used by the various HDFS services.
| 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 |
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|
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
|
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|
50010 |
Data transfer |
dfs.datanode.address
|
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|
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
|
