Storing and Configuring Data with Hadoop, YARN, and ZooKeeper - Big Data Made Easy: A Working Guide to the Complete Hadoop Toolset - page 31

Figure 2-4. Hadoop Job Tracker user interface
The Task Tracker UI is on port 50060; this is the value defined by the variable mapred.task.tracker.http.address in
the configuration file mapred-site.xml. Use the URL http://hc1nn:50060/ (on the name node hc1nn) to access it and
check the status of current tasks. Figure 2-5 shows running and non-running tasks, as well as providing a link to the
log files. It also offers a basic list of task statuses and their progress.