Hadoop TaskTracker startup progress (HADOOP_TASKTRACKER_STARTUPPROGRESS)

The HADOOP_TASKTRACKER_STARTUPPROGRESS application class displays the statistics of TaskTracker startup. Four metrics are exposed for each startup phase based on its name. The startup phases are LoadingFsImage, LoadingEdits, SavingCheckpoint, and SafeMode. The Hadoop KM gathers these attributes by executing the following query:

<TaskTracker jmx url>?qry=Hadoop:service=TaskTracker ,name=StartupProgress

where,

<TaskTracker jmx url>  Java Management Extensions url, http://<<TaskTracker name>>:<<TaskTracker 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)

• Elapsed time (ElapsedTime)
• Loading edits count (LoadingEditsCount)
• Loading edits elapsed time (LoadingEditsElapsedTime)
• Loading edits percent complete (LoadingEditsPercentComplete)
• Loading edits total (LoadingEditsTotal)
• Loading fs image count (LoadingFsImageCount)
• Loading fs image elapsed time (LoadingFsImageElapsedTime)
• Loading fs image percent complete (LoadingFsImagePercentComplete)
• Loading fs image total (LoadingFsImageTotal)
• Percent complete (PercentComplete)
• Safe mode count (SafeModeCount)
• Safe mode elapsed time (SafeModeElapsedTime)
• Safe mode percent complete (SafeModePercentComplete)
• Safe mode total (SafeModeTotal)
• Saving checkpoint count (SavingCheckpointCount)
• Saving checkpoint elapsed time (SavingCheckpointElapsedTime)
• Saving checkpoint percent complete (SavingCheckpointPercentComplete)
• Saving checkpoint total (SavingCheckpointTotal)