Hadoop NameNode FS name system state (HADOOP_NAMENODE_FSNAMESYSTEMSTATE)

This application class monitors the file system states of a NameNode. The Hadoop KM gathers these attributes by executing the following query:

<NameNode jmx url>?qry=Hadoop:service=NameNode,name=FSNamesystemState

where,

<NameNode jmx url> is the Java Management Extensions url, http://<<namenode host name>>:<<namenode 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)

• Blocks total (BlocksTotal)
• Capacity remaining (CapacityRemaining)
• CapacityRemainingPct
• Capacity total (CapacityTotal)
• Capacity used (CapacityUsed)
• CapacityUsedPct
• Files total (FilesTotal)
• Max objects (MaxObjects)
• Num dead data nodes (NumDeadDataNodes)
• Num decom dead nodes (NumDecomDeadDataNodes)
• Num decom live data nodes (NumDecomLiveDataNodes)
• Num decom missioning data nodes (NumDecommissioningDataNodes)
• Num live data nodes (NumLiveDataNodes)
• Num stale data nodes (NumStaleDataNodes)
• Pending deletion blocks (PendingDeletionBlocks)
• Pending replication blocks (PendingReplicationBlocks)
• Scheduled replication blocks (ScheduledReplicationBlocks)
• Snapshots (NameNode FS name system state)
• Snapshottable directories (SnapshottableDirectories)
• Total load (TotalLoad)
• Under replicated blocks (UnderReplicatedBlocks)