def create_job_for_task(self, task_descriptor, job_options, job_id=None):
"""
Convert a task descriptor into a job. Allocates a new job id,
creates a Job, and entrains it to the JobPool.
This is always called with job_id = None; not sure why there's
even an argument for it.
"""
with self._lock:
if job_id is None:
job_id = self.allocate_job_id()
task_id = 'root:%s' % (job_id, )
task_descriptor['task_id'] = task_id
# TODO: Here is where we will set up the job journal, etc.
job_dir = self.make_job_directory(job_id)
try:
expected_outputs = task_descriptor['expected_outputs']
except KeyError:
expected_outputs = ['%s:job_output' % job_id]
task_descriptor['expected_outputs'] = expected_outputs
task = build_taskpool_task_from_descriptor(task_descriptor, None)
job = Job(job_id, task, job_dir, JOB_CREATED, self, job_options)
task.job = job
self.add_job(job)
ciel.log('Added job: %s' % job.id, 'JOB_POOL', logging.INFO)
return job
def create_job_for_task(self, task_descriptor, job_options, job_id=None):
with self._lock:
if job_id is None:
job_id = self.allocate_job_id()
task_id = 'root:%s' % (job_id, )
task_descriptor['task_id'] = task_id
# TODO: Here is where we will set up the job journal, etc.
job_dir = self.make_job_directory(job_id)
try:
expected_outputs = task_descriptor['expected_outputs']
except KeyError:
expected_outputs = ['%s:job_output' % job_id]
task_descriptor['expected_outputs'] = expected_outputs
task = build_taskpool_task_from_descriptor(task_descriptor, None)
job = Job(job_id, task, job_dir, JOB_CREATED, self, job_options)
task.job = job
self.add_job(job)
ciel.log('Added job: %s' % job.id, 'JOB_POOL', logging.INFO)
return job
def create_job_for_task(self, task_descriptor, job_options, job_id=None):
with self._lock:
if job_id is None:
job_id = self.allocate_job_id()
task_id = 'root:%s' % (job_id, )
task_descriptor['task_id'] = task_id
# TODO: Here is where we will set up the job journal, etc.
job_dir = self.make_job_directory(job_id)
try:
expected_outputs = task_descriptor['expected_outputs']
except KeyError:
expected_outputs = ['%s:job_output' % job_id]
task_descriptor['expected_outputs'] = expected_outputs
task = build_taskpool_task_from_descriptor(task_descriptor, None)
job = Job(job_id, task, job_dir, JOB_CREATED, self, job_options)
task.job = job
self.add_job(job)
ciel.log('Added job: %s' % job.id, 'JOB_POOL', logging.INFO)
return job
def spawn_and_publish(self, spawns, refs, producer=None, taskset=None):
producer_task = None
if producer is not None:
producer_task = self.get_task(producer["task_id"])
taskset = producer_task.taskset
upd = TaskGraphUpdate()
for spawn in spawns:
task_object = build_taskpool_task_from_descriptor(spawn, producer_task, taskset)
upd.spawn(task_object)
for ref in refs:
upd.publish(ref, producer_task)
upd.commit(self)
def _report_tasks(self, report, toplevel_task, worker):
# XXX SOS22 This does a damn sight more than just reporting the tasks!
with self._lock:
tx = TaskGraphUpdate()
root_task = self.task_graph.get_task(report[0][0])
ciel.log('Received report from task %s with %d entries' % (root_task.task_id, len(report)), 'SCHED', logging.DEBUG)
try:
self.workers[worker].deassign_task(root_task)
except KeyError:
# This can happen if we recieve the report after the worker is deemed to have failed. In this case, we should
# accept the report and ignore the failed worker.
pass
for (parent_id, success, payload) in report:
ciel.log('Processing report record from task %s' % (parent_id), 'SCHED', logging.DEBUG)
parent_task = self.task_graph.get_task(parent_id)
if success:
ciel.log('Task %s was successful' % (parent_id), 'SCHED', logging.DEBUG)
(spawned, published, profiling) = payload
parent_task.set_profiling(profiling)
parent_task.set_state(TASK_COMMITTED)
self.record_task_stats(parent_task, worker)
for child in spawned:
child_task = build_taskpool_task_from_descriptor(child, parent_task)
ciel.log('Task %s spawned task %s' % (parent_id, child_task.task_id), 'SCHED', logging.DEBUG)
tx.spawn(child_task)
#parent_task.children.append(child_task)
for ref in published:
ciel.log('Task %s published reference %s' % (parent_id, str(ref)), 'SCHED', logging.DEBUG)
tx.publish(ref, parent_task)
else:
ciel.log('Task %s failed' % (parent_id), 'SCHED', logging.WARN)
# Only one failed task per-report, at the moment.
self.investigate_task_failure(parent_task, payload)
self.schedule()
return
tx.commit(self.task_graph)
self.task_graph.reduce_graph_for_references(toplevel_task.expected_outputs)
# XXX: Need to remove assigned task from worker(s).
self.schedule()
def recover_job_descriptors(self):
root = self.job_pool.journal_root
if root is None:
return
for job_id in os.listdir(root):
try:
job_dir = os.path.join(root, job_id)
result_path = os.path.join(job_dir, 'result')
if os.path.exists(result_path):
with open(result_path, 'r') as result_file:
result = simplejson.load(result_file, object_hook=json_decode_object_hook)
else:
result = None
journal_path = os.path.join(job_dir, 'task_journal')
journal_file = open(journal_path, 'rb')
record_type, root_task_descriptor_length = RECORD_HEADER_STRUCT.unpack(journal_file.read(RECORD_HEADER_STRUCT.size))
root_task_descriptor_string = journal_file.read(root_task_descriptor_length)
assert record_type == 'T'
assert len(root_task_descriptor_string) == root_task_descriptor_length
root_task_descriptor = simplejson.loads(root_task_descriptor_string, object_hook=json_decode_object_hook)
root_task = build_taskpool_task_from_descriptor(root_task_descriptor, None)
# FIXME: Get the job pool to create this job, because it has access to the scheduler queue and task failure investigator.
# FIXME: Store job options somewhere for recovered job.
job = Job(job_id, root_task, job_dir, JOB_RECOVERED, self.job_pool, {}, journal=False)
root_task.job = job
if result is not None:
with job._lock:
job.completed(result)
self.job_pool.add_job(job)
# Adding the job to the job pool should add the root task.
#self.task_pool.add_task(root_task)
if result is None:
self.load_other_tasks_defer(job, journal_file)
ciel.log.error('Recovered job %s' % job_id, 'RECOVERY', logging.INFO, False)
ciel.log.error('Recovered task %s for job %s' % (root_task.task_id, job_id), 'RECOVERY', logging.INFO, False)
else:
journal_file.close()
ciel.log.error('Found information about job %s' % job_id, 'RECOVERY', logging.INFO, False)
except:
# We have lost critical data for the job, so we must fail it.
ciel.log.error('Error recovering job %s' % job_id, 'RECOVERY', logging.ERROR, True)
self.job_pool.add_failed_job(job_id)
def spawn_and_publish(self, spawns, refs, producer=None, taskset=None):
producer_task = None
if producer is not None:
producer_task = self.get_task(producer["task_id"])
taskset = producer_task.taskset
upd = TaskGraphUpdate()
for spawn in spawns:
task_object = build_taskpool_task_from_descriptor(
spawn, producer_task, taskset)
upd.spawn(task_object)
for ref in refs:
upd.publish(ref, producer_task)
upd.commit(self)
def recover_job_descriptors(self):
root = self.job_pool.journal_root
if root is None:
return
for job_id in os.listdir(root):
try:
job_dir = os.path.join(root, job_id)
result_path = os.path.join(job_dir, 'result')
if os.path.exists(result_path):
with open(result_path, 'r') as result_file:
result = simplejson.load(result_file, object_hook=json_decode_object_hook)
else:
result = None
journal_path = os.path.join(job_dir, 'task_journal')
journal_file = open(journal_path, 'rb')
record_type, root_task_descriptor_length = RECORD_HEADER_STRUCT.unpack(journal_file.read(RECORD_HEADER_STRUCT.size))
root_task_descriptor_string = journal_file.read(root_task_descriptor_length)
assert record_type == 'T'
assert len(root_task_descriptor_string) == root_task_descriptor_length
root_task_descriptor = simplejson.loads(root_task_descriptor_string, object_hook=json_decode_object_hook)
root_task = build_taskpool_task_from_descriptor(root_task_descriptor, None)
# FIXME: Get the job pool to create this job, because it has access to the scheduler queue and task failure investigator.
# FIXME: Store job options somewhere for recovered job.
job = Job(job_id, root_task, job_dir, JOB_RECOVERED, self.job_pool, {}, journal=False)
root_task.job = job
if result is not None:
with job._lock:
job.completed(result)
self.job_pool.add_job(job)
# Adding the job to the job pool should add the root task.
#self.task_pool.add_task(root_task)
if result is None:
self.load_other_tasks_defer(job, journal_file)
ciel.log.error('Recovered job %s' % job_id, 'RECOVERY', logging.INFO, False)
ciel.log.error('Recovered task %s for job %s' % (root_task.task_id, job_id), 'RECOVERY', logging.INFO, False)
else:
journal_file.close()
ciel.log.error('Found information about job %s' % job_id, 'RECOVERY', logging.INFO, False)
except:
# We have lost critical data for the job, so we must fail it.
ciel.log.error('Error recovering job %s' % job_id, 'RECOVERY', logging.ERROR, True)
self.job_pool.add_failed_job(job_id)
def add_task(self, task_descriptor, parent_task=None, job=None, may_reduce=True):
try:
task_id = task_descriptor['task_id']
except:
task_id = self.generate_task_id()
task_descriptor['task_id'] = task_id
task = build_taskpool_task_from_descriptor(task_descriptor, parent_task)
task.job = job
self.lazy_task_pool.add_task(task, parent_task is None, may_reduce)
#add_event = self.new_event(task)
#add_event["task_descriptor"] = task.as_descriptor(long=True)
#add_event["action"] = "CREATED"
#self.events.append(add_event)
return task
def load_other_tasks_for_job(self, job, journal_file):
'''
Process a the task journal for a recovered job.
'''
try:
while True:
record_header = journal_file.read(RECORD_HEADER_STRUCT.size)
if len(record_header) != RECORD_HEADER_STRUCT.size:
ciel.log.error('Journal entry truncated for job %s' % job.id, 'RECOVERY', logging.WARNING, False)
# XXX: Need to truncate the journal file.
break
record_type, record_length = RECORD_HEADER_STRUCT.unpack(record_header)
record_string = journal_file.read(record_length)
if len(record_string) != record_length:
ciel.log.error('Journal entry truncated for job %s' % job.id, 'RECOVERY', logging.WARNING, False)
# XXX: Need to truncate the journal file.
break
rec = simplejson.loads(record_string, object_hook=json_decode_object_hook)
if record_type == 'R':
job.task_graph.publish(rec['ref'])
elif record_type == 'T':
task_id = rec['task_id']
parent_task = job.task_graph.get_task(rec['parent'])
task = build_taskpool_task_from_descriptor(rec, parent_task)
task.job = job
task.parent.children.append(task)
ciel.log.error('Recovered task %s for job %s' % (task_id, job.id), 'RECOVERY', logging.INFO, False)
job.task_graph.spawn(task)
else:
ciel.log.error('Got invalid record type in job %s' % job.id, 'RECOVERY', logging.WARNING, False)
except:
ciel.log.error('Error recovering task_journal for job %s' % job.id, 'RECOVERY', logging.WARNING, True)
finally:
journal_file.close()
job.restart_journalling()
if job.state == JOB_ACTIVE:
ciel.log.error('Restarting recovered job %s' % job.id, 'RECOVERY', logging.INFO)
def load_other_tasks_for_job(self, job, journal_file):
'''
Process a the task journal for a recovered job.
'''
try:
while True:
record_header = journal_file.read(RECORD_HEADER_STRUCT.size)
if len(record_header) != RECORD_HEADER_STRUCT.size:
ciel.log.error('Journal entry truncated for job %s' % job.id, 'RECOVERY', logging.WARNING, False)
# XXX: Need to truncate the journal file.
break
record_type, record_length = RECORD_HEADER_STRUCT.unpack(record_header)
record_string = journal_file.read(record_length)
if len(record_string) != record_length:
ciel.log.error('Journal entry truncated for job %s' % job.id, 'RECOVERY', logging.WARNING, False)
# XXX: Need to truncate the journal file.
break
rec = simplejson.loads(record_string, object_hook=json_decode_object_hook)
if record_type == 'R':
job.task_graph.publish(rec['ref'])
elif record_type == 'T':
task_id = rec['task_id']
parent_task = job.task_graph.get_task(rec['parent'])
task = build_taskpool_task_from_descriptor(rec, parent_task)
task.job = job
task.parent.children.append(task)
ciel.log.error('Recovered task %s for job %s' % (task_id, job.id), 'RECOVERY', logging.INFO, False)
job.task_graph.spawn(task)
else:
ciel.log.error('Got invalid record type in job %s' % job.id, 'RECOVERY', logging.WARNING, False)
except:
ciel.log.error('Error recovering task_journal for job %s' % job.id, 'RECOVERY', logging.WARNING, True)
finally:
journal_file.close()
job.restart_journalling()
if job.state == JOB_ACTIVE:
ciel.log.error('Restarting recovered job %s' % job.id, 'RECOVERY', logging.INFO)
def add_task(self,
task_descriptor,
parent_task=None,
job=None,
may_reduce=True):
try:
task_id = task_descriptor['task_id']
except:
task_id = self.generate_task_id()
task_descriptor['task_id'] = task_id
task = build_taskpool_task_from_descriptor(task_descriptor,
parent_task)
task.job = job
self.lazy_task_pool.add_task(task, parent_task is None, may_reduce)
#add_event = self.new_event(task)
#add_event["task_descriptor"] = task.as_descriptor(long=True)
#add_event["action"] = "CREATED"
#self.events.append(add_event)
return task
def _report_tasks(self, report, toplevel_task, worker):
with self._lock:
tx = TaskGraphUpdate()
root_task = self.task_graph.get_task(report[0][0])
ciel.log(
'Received report from task %s with %d entries' %
(root_task.task_id, len(report)), 'SCHED', logging.DEBUG)
try:
self.workers[worker].deassign_task(root_task)
except KeyError:
# This can happen if we recieve the report after the worker is deemed to have failed. In this case, we should
# accept the report and ignore the failed worker.
pass
for (parent_id, success, payload) in report:
ciel.log('Processing report record from task %s' % (parent_id),
'SCHED', logging.DEBUG)
parent_task = self.task_graph.get_task(parent_id)
if success:
ciel.log('Task %s was successful' % (parent_id), 'SCHED',
logging.DEBUG)
(spawned, published, profiling) = payload
parent_task.set_profiling(profiling)
parent_task.set_state(TASK_COMMITTED)
self.record_task_stats(parent_task, worker)
for child in spawned:
child_task = build_taskpool_task_from_descriptor(
child, parent_task)
ciel.log(
'Task %s spawned task %s' %
(parent_id, child_task.task_id), 'SCHED',
logging.DEBUG)
tx.spawn(child_task)
#parent_task.children.append(child_task)
for ref in published:
ciel.log(
'Task %s published reference %s' %
(parent_id, str(ref)), 'SCHED', logging.DEBUG)
tx.publish(ref, parent_task)
else:
ciel.log('Task %s failed' % (parent_id), 'SCHED',
logging.WARN)
# Only one failed task per-report, at the moment.
self.investigate_task_failure(parent_task, payload)
self.schedule()
return
tx.commit(self.task_graph)
self.task_graph.reduce_graph_for_references(
toplevel_task.expected_outputs)
# XXX: Need to remove assigned task from worker(s).
self.schedule()
