def cancel(task_id):
"""
Cancel the task that is represented by the given task_id.
This method cancels only the task with given task_id, not the spawned tasks. This also updates
task's state to 'canceled'.
Args:
task_id (str): The ID of the task you wish to cancel
Raises:
MissingResource: if a task with given task_id does not exist
"""
try:
task_status = Task.objects.get(pk=task_id)
except Task.DoesNotExist:
raise MissingResource(task=task_id)
if task_status.state in TASK_FINAL_STATES:
# If the task is already done, just stop
msg = _("Task [{task_id}] already in a final state: {state}")
_logger.debug(msg.format(task_id=task_id, state=task_status.state))
return task_status
_logger.info(_("Canceling task: {id}").format(id=task_id))
redis_conn = connection.get_redis_connection()
job = Job(id=str(task_status.pk), connection=redis_conn)
resource_job = Job(id=str(task_status._resource_job_id),
connection=redis_conn)
task_status.state = TASK_STATES.CANCELED
task_status.save()
resource_job.cancel()
job.cancel()
try:
send_stop_job_command(redis_conn, job.get_id())
send_stop_job_command(redis_conn, resource_job.get_id())
except (InvalidJobOperation, NoSuchJobError):
# We don't care if the job isn't currently running when we try to cancel
pass
# A hack to ensure that we aren't deleting resources still being used by the workhorse
time.sleep(0.5)
with transaction.atomic():
for report in task_status.progress_reports.all():
if report.state not in TASK_FINAL_STATES:
report.state = TASK_STATES.CANCELED
report.save()
_delete_incomplete_resources(task_status)
task_status.release_resources()
return task_status
def cancel(task_id):
"""
Cancel the task that is represented by the given task_id.
This method cancels only the task with given task_id, not the spawned tasks. This also updates
task's state to either 'canceled' or 'canceling'.
Args:
task_id (str): The ID of the task you wish to cancel
Raises:
MissingResource: if a task with given task_id does not exist
"""
try:
task_status = Task.objects.get(pk=task_id)
except Task.DoesNotExist:
raise MissingResource(task=task_id)
if task_status.state in TASK_FINAL_STATES:
# If the task is already done, just stop
msg = _("Task [{task_id}] already in a final state: {state}")
_logger.debug(msg.format(task_id=task_id, state=task_status.state))
return task_status
_logger.info(_("Canceling task: {id}").format(id=task_id))
if settings.USE_NEW_WORKER_TYPE:
task = task_status
# This is the only valid transition without holding the task lock
rows = Task.objects.filter(pk=task.pk,
state__in=TASK_INCOMPLETE_STATES).update(
state=TASK_STATES.CANCELING)
# Notify the worker that might be running that task and other workers to clean up
with db_connection.cursor() as cursor:
cursor.execute("SELECT pg_notify('pulp_worker_cancel', %s)",
(str(task.pk), ))
cursor.execute("NOTIFY pulp_worker_wakeup")
if rows == 1:
task.refresh_from_db()
return task
redis_conn = connection.get_redis_connection()
job = Job(id=str(task_status.pk), connection=redis_conn)
resource_job = Job(id=str(task_status._resource_job_id),
connection=redis_conn)
task_status.state = TASK_STATES.CANCELED
task_status.save()
resource_job.cancel()
job.cancel()
try:
send_stop_job_command(redis_conn, job.get_id())
send_stop_job_command(redis_conn, resource_job.get_id())
except (InvalidJobOperation, NoSuchJobError):
# We don't care if the job isn't currently running when we try to cancel
pass
# A hack to ensure that we aren't deleting resources still being used by the workhorse
time.sleep(0.5)
with transaction.atomic():
for report in task_status.progress_reports.all():
if report.state not in TASK_FINAL_STATES:
report.state = TASK_STATES.CANCELED
report.save()
_delete_incomplete_resources(task_status)
task_status.release_resources()
return task_status