Hadoop 8088

Port 8088 in Hadoop typically refers to the HTTP user interface (UI) for the ResourceManager service in a Hadoop cluster. The ResourceManager is a critical component of Hadoop’s resource management and job scheduling system, responsible for managing and allocating cluster resources to running applications.

Here’s what you can typically find on port 8088:

1. ResourceManager Web UI: The Hadoop ResourceManager’s web UI, available on port 8088 by default, provides an overview of the cluster’s resource allocation and job information.

2. Cluster Summary: The web UI offers a summary of the cluster’s current state, including information about the total number of nodes, the amount of memory and virtual cores allocated, and the total available cluster resources.

3. Application Listing: It lists all running and completed applications (MapReduce jobs, Spark applications, etc.) in the cluster, along with details like application name, ID, status, progress, and resource usage.

4. Job Tracking: The ResourceManager UI allows you to track the progress of individual jobs, monitor their resource consumption, and view logs and diagnostic information.

5. Node Information: You can also find information about individual nodes (NodeManagers) in the cluster, including their health status, resource usage, and assigned containers.

6. Queue Management: The ResourceManager UI provides tools for managing job queues and controlling job prioritization in multi-tenant clusters.

7. Logs and Diagnostics: In case of issues or errors, you can access logs and diagnostic information directly from the web UI to troubleshoot problems.