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java.lang.Objectorg.apache.hadoop.mapred.JobHistory.Task
public static class JobHistory.Task
Helper class for logging or reading back events related to Task's start, finish or failure. All events logged by this class are logged in a separate file per job in job tracker history. These events map to TIPs in jobtracker.
Constructor Summary | |
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JobHistory.Task()
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Method Summary | |
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java.lang.String |
get(JobHistory.Keys k)
Get 'String' value for given key. |
int |
getInt(JobHistory.Keys k)
Convert value from history to int and return. |
long |
getLong(JobHistory.Keys k)
Convert value from history to int and return. |
java.util.Map<java.lang.String,JobHistory.TaskAttempt> |
getTaskAttempts()
Returns all task attempts for this task. |
java.util.Map<JobHistory.Keys,java.lang.String> |
getValues()
Returns Map containing all key-values. |
void |
handle(java.util.Map<JobHistory.Keys,java.lang.String> values)
Reads values back from the history, input is same Map as passed to Listener by parseHistory(). |
static void |
logFailed(TaskID taskId,
java.lang.String taskType,
long time,
java.lang.String error)
Log job failed event. |
static void |
logFailed(TaskID taskId,
java.lang.String taskType,
long time,
java.lang.String error,
TaskAttemptID failedDueToAttempt)
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static void |
logFinished(TaskID taskId,
java.lang.String taskType,
long finishTime,
Counters counters)
Log finish time of task. |
static void |
logStarted(TaskID taskId,
java.lang.String taskType,
long startTime,
java.lang.String splitLocations)
Log start time of task (TIP). |
static void |
logUpdates(TaskID taskId,
long finishTime)
Update the finish time of task. |
void |
set(JobHistory.Keys k,
java.lang.String s)
Set value for the key. |
void |
set(java.util.Map<JobHistory.Keys,java.lang.String> m)
Adds all values in the Map argument to its own values. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public JobHistory.Task()
Method Detail |
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public static void logStarted(TaskID taskId, java.lang.String taskType, long startTime, java.lang.String splitLocations)
taskId
- task idtaskType
- MAP or REDUCEstartTime
- startTime of tip.public static void logFinished(TaskID taskId, java.lang.String taskType, long finishTime, Counters counters)
taskId
- task idtaskType
- MAP or REDUCEfinishTime
- finish timeof task in mspublic static void logUpdates(TaskID taskId, long finishTime)
taskId
- task idfinishTime
- finish time of task in mspublic static void logFailed(TaskID taskId, java.lang.String taskType, long time, java.lang.String error)
taskId
- task idtaskType
- MAP or REDUCE.time
- timestamp when job failed detected.error
- error message for failure.public static void logFailed(TaskID taskId, java.lang.String taskType, long time, java.lang.String error, TaskAttemptID failedDueToAttempt)
failedDueToAttempt
- The attempt that caused the failure, if anypublic java.util.Map<java.lang.String,JobHistory.TaskAttempt> getTaskAttempts()
public java.lang.String get(JobHistory.Keys k)
k
-
public int getInt(JobHistory.Keys k)
k
- keypublic long getLong(JobHistory.Keys k)
k
- public void set(JobHistory.Keys k, java.lang.String s)
k
- s
- public void set(java.util.Map<JobHistory.Keys,java.lang.String> m)
m
- public void handle(java.util.Map<JobHistory.Keys,java.lang.String> values)
values
- public java.util.Map<JobHistory.Keys,java.lang.String> getValues()
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