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java.lang.Object org.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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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. |
Map<String,JobHistory.TaskAttempt> |
getTaskAttempts()
Returns all task attempts for this task. |
Map<JobHistory.Keys,String> |
getValues()
Returns Map containing all key-values. |
void |
handle(Map<JobHistory.Keys,String> values)
Reads values back from the history, input is same Map as passed to Listener by parseHistory(). |
static void |
logFailed(String jobId,
String taskId,
String taskType,
long time,
String error)
Log job failed event. |
static void |
logFinished(String jobId,
String taskId,
String taskType,
long finishTime)
Log finish time of task. |
static void |
logStarted(String jobId,
String taskId,
String taskType,
long startTime)
Log start time of task (TIP). |
void |
set(JobHistory.Keys k,
String s)
Set value for the key. |
void |
set(Map<JobHistory.Keys,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(String jobId, String taskId, String taskType, long startTime)
jobId
- job idtaskId
- task idtaskType
- MAP or REDUCEstartTime
- startTime of tip.public static void logFinished(String jobId, String taskId, String taskType, long finishTime)
jobId
- job idtaskId
- task idtaskType
- MAP or REDUCEfinishTime
- finish timeof task in mspublic static void logFailed(String jobId, String taskId, String taskType, long time, String error)
jobId
- jobidtaskId
- task idtaskType
- MAP or REDUCE.time
- timestamp when job failed detected.error
- error message for failure.public Map<String,JobHistory.TaskAttempt> getTaskAttempts()
public 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, String s)
k
- s
- public void set(Map<JobHistory.Keys,String> m)
m
- public void handle(Map<JobHistory.Keys,String> values)
values
- public Map<JobHistory.Keys,String> getValues()
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