## Uses of Interface
org.apache.hadoop.mapreduce.jobhistory.HistoryEvent

- Packages that use HistoryEvent
  Package | Description
  --- | ---
  org.apache.hadoop.mapreduce.jobhistory |

- - ### Uses of HistoryEvent in org.apache.hadoop.mapreduce.jobhistory

    Classes in org.apache.hadoop.mapreduce.jobhistory that implement HistoryEvent
    Modifier and Type | Class and Description
    --- | ---
    `class` | `AMStartedEvent` Event to record start of a task attempt
    `class` | `JobFinishedEvent` Event to record successful completion of job
    `class` | `JobInfoChangeEvent` Event to record changes in the submit and launch time of a job
    `class` | `JobInitedEvent` Event to record the initialization of a job
    `class` | `JobPriorityChangeEvent` Event to record the change of priority of a job
    `class` | `JobQueueChangeEvent`
    `class` | `JobStatusChangedEvent` Event to record the change of status for a job
    `class` | `JobSubmittedEvent` Event to record the submission of a job
    `class` | `JobUnsuccessfulCompletionEvent` Event to record Failed and Killed completion of jobs
    `class` | `MapAttemptFinishedEvent` Event to record successful completion of a map attempt.
    `class` | `NormalizedResourceEvent` Event to record the normalized map/reduce requirements.
    `class` | `ReduceAttemptFinishedEvent` Event to record successful completion of a reduce attempt
    `class` | `TaskAttemptFinishedEvent` Event to record successful task completion
    `class` | `TaskAttemptStartedEvent` Event to record start of a task attempt
    `class` | `TaskAttemptUnsuccessfulCompletionEvent` Event to record unsuccessful (Killed/Failed) completion of task attempts
    `class` | `TaskFailedEvent` Event to record the failure of a task
    `class` | `TaskFinishedEvent` Event to record the successful completion of a task
    `class` | `TaskStartedEvent` Event to record the start of a task
    `class` | `TaskUpdatedEvent` Event to record updates to a task

    Methods in org.apache.hadoop.mapreduce.jobhistory that return HistoryEvent
    Modifier and Type | Method and Description
    --- | ---
    `HistoryEvent` | EventReader.`getNextEvent()` Get the next event from the stream

    Methods in org.apache.hadoop.mapreduce.jobhistory with parameters of type HistoryEvent
    Modifier and Type | Method and Description
    --- | ---
    `void` | JobHistoryParser.`handleEvent(HistoryEvent event)`
    `void` | HistoryEventHandler.`handleEvent(HistoryEvent event)`

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