Exploring the HDInsight Name Node - Pro Microsoft HDInsight: Hadoop on Windows - page 104

The Hadoop MapReduce portal gives you a comprehensive summary on each of the submitted jobs. You can
drill down into the stdout and stderr output of the jobs, so it is obvious that the portal is a great place to start
troubleshooting a MapReduce job problem.
The Name Node Status Portal
The Hadoop Name Node Status web interface shows a cluster summary, including information about total and
remaining capacity, the file system, and cluster health. The interface also gives the number of live, dead, and
decommissioning nodes. The Name Node Status Portal is a Java web application that listens on port 50070. It can be
launched from the URL http://<NameNode_IP_Address>:50070/dfshealth.jsp .
Additionally, the Name Node Status Portal allows you to browse the HDFS (actually, WASB) namespace and view
the contents of its files in the web browser. It also gives access to the name node's log files for Hadoop services. At a
glance, this portal gives you an overview of how your cluster is doing, as shown in Figure 6-13 .
Figure 6-13. The Name Node Status Portal