/** Adds a previously running task to this tip. This is used in case of jobtracker restarts. */
public Task addRunningTask(TaskAttemptID taskid, String taskTracker, boolean taskCleanup) {
// 1 slot is enough for taskCleanup task
int numSlotsNeeded = taskCleanup ? 1 : numSlotsRequired;
// create the task
Task t = null;
if (isMapTask()) {
LOG.debug(
"attempt "
+ numTaskFailures
+ " sending skippedRecords "
+ failedRanges.getIndicesCount());
String splitClass = null;
BytesWritable split;
if (!jobSetup && !jobCleanup) {
splitClass = rawSplit.getClassName();
split = rawSplit.getBytes();
} else {
split = new BytesWritable();
}
t = new MapTask(jobFile, taskid, partition, splitClass, split, numSlotsNeeded, job.getUser());
} else {
t = new ReduceTask(jobFile, taskid, partition, numMaps, numSlotsNeeded, job.getUser());
}
if (jobCleanup) {
t.setJobCleanupTask();
}
if (jobSetup) {
t.setJobSetupTask();
}
if (taskCleanup) {
t.setTaskCleanupTask();
t.setState(taskStatuses.get(taskid).getRunState());
cleanupTasks.put(taskid, taskTracker);
}
t.setConf(conf);
LOG.debug("Launching task with skipRanges:" + failedRanges.getSkipRanges());
t.setSkipRanges(failedRanges.getSkipRanges());
t.setSkipping(skipping);
if (failedRanges.isTestAttempt()) {
t.setWriteSkipRecs(false);
}
if (activeTasks.size() >= 1) {
speculativeTaskId = taskid;
} else {
speculativeTaskId = null;
}
activeTasks.put(taskid, taskTracker);
tasks.add(taskid);
// Ask JobTracker to note that the task exists
// jobtracker.createTaskEntry(taskid, taskTracker, this);
/*
// code to find call paths to createTaskEntry
StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
boolean found = false;
for (StackTraceElement s: stackTraceElements) {
if (s.getMethodName().indexOf("heartbeat") != -1 ||
s.getMethodName().indexOf("findTask") != -1 ||
s.getMethodName().indexOf("createAndAddAttempt") != -1 ||
s.getMethodName().indexOf("processTaskAttempt") != -1) {
found = true;
break;
}
}
if (!found) {
RuntimeException e = new RuntimeException ("calling addRunningTask from outside heartbeat");
LOG.info(StringUtils.stringifyException(e));
throw (e);
}
*/
// check and set the first attempt
if (firstTaskId == null) {
firstTaskId = taskid;
}
return t;
}
