The following table lists the default ports used by the various MapReduce services.
| Service | Servers | Default Ports Used | Protocol | Description | Need End User Access? | Configuration Parameters |
|
JobTracker WebUI |
Master Nodes (JobTracker Node and any back-up JobTracker node ) | 50030 | http | Web UI for JobTracker | Yes | mapred.job.tracker.http.address |
|
JobTracker |
Master Nodes (JobTracker Node) | 8021 | IPC |
For job submissions |
Yes (All clients who need to submit the MapReduce jobs including Hive, Hive server, Pig) | Embedded in URI specified by mapred.job.tracker
|
|
TaskTracker Web UI and Shuffle |
All Slave Nodes |
50060 |
http | DataNode Web UI to access status, logs, etc. | Yes (Typically admins, Dev/Support teams) | mapred.task.tracker.http.address
|
| History Server WebUI | 51111 | http | Web UI for Job History | Yes | mapreduce.history.server.http.address |
