Hadoop JobTracker info (HADOOP_JOBTRACKER_INFO)

This application class contains attributes that display the JobTracker information. The attributes include number of alive, blacklisted and graylisted trackers, jobs, nodes, nodes used and other metrics of the cluster. The Hadoop KM gathers these metrics by executing the following query:

<JobTracker jmx url>?qry=Hadoop:service=JobTracker,name=JobTrackerInfo

where,

<JobTracker jmx url> is the Java Management Extensions url, http://<<jobtracker host name>>:<<jobtracker port>>/jmx

qry is Hadoop by default

service contains the type of the group, for example, DataNode, ResourceManager, JobTracker, ResourceManager, TaskTracker and other available groups

name contains the type of metrics data you want to collect and display, for example, JVMmetrics, Queuemetrics, RPCactivity and other available metrics types

Application class attributes

Attributes (parameters)

• Alive
• Blacklisted
• Graylisted
• Jobs
• Map slots (MapSlots)
• Map slots used (MapSlotsUsed)
• Nodes
• Reduce slots (ReduceSlots)
• Reduce slots used (ReduceSlotsUsed)
• Thread count (ThreadCount)