def launchTask(self, driver, task):
"""Queue a new garbage collection run, and drop any currently-enqueued runs."""
if self._slave_id is None:
self._slave_id = task.slave_id.value
task_id = task.task_id.value
self.log('launchTask() got task_id: %s' % task_id)
if task_id == self._task_id:
self.log('=> GC with task_id %s currently running - ignoring' % task_id)
return
elif task_id in self._gc_task_queue:
self.log('=> Already have task_id %s queued - ignoring' % task_id)
return
try:
art = thrift_deserialize(AdjustRetainedTasks(), task.data)
except Exception as err:
self.log('Error deserializing task: %s' % err)
self.send_update(
self._driver, task_id, mesos_pb.TASK_FAILED, 'Deserialization of GC task failed')
return
try:
prev_task_id, _ = self._gc_task_queue.popitem(0)
except KeyError: # no enqueued GC tasks - reset counter
self._dropped_tasks.write(0)
else:
self.log('=> Dropping previously queued GC with task_id %s' % prev_task_id)
self._dropped_tasks.increment()
self.log('=> Updating scheduler')
self.send_update(self._driver, prev_task_id, mesos_pb.TASK_FINISHED,
'Garbage collection skipped - GC executor received another task')
self.log('=> Adding %s to GC queue' % task_id)
self._gc_task_queue[task_id] = (task, art.retainedTasks, self._clock.time())
def test_gc_wait():
# run w/ no tasks
with run_gc_with_timeout(
maximum_executor_wait=Amount(15, Time.SECONDS)) as (proxy_driver,
executor):
executor._clock.tick(10)
proxy_driver.stopped.wait(timeout=0.1)
assert not proxy_driver.stopped.is_set()
executor._clock.tick(5.1)
proxy_driver.stopped.wait(timeout=0.1)
assert proxy_driver.stopped.is_set()
assert not executor._stop_event.is_set()
# ensure launchTask restarts executor wait
with run_gc_with_timeout(
maximum_executor_wait=Amount(15, Time.SECONDS)) as (proxy_driver,
executor):
executor._clock.tick(10)
proxy_driver.stopped.wait(timeout=0.1)
assert not proxy_driver.stopped.is_set()
executor.launchTask(
proxy_driver, serialize_art(AdjustRetainedTasks(retainedTasks={})))
executor._clock.tick(5.1)
proxy_driver.stopped.wait(timeout=0.1)
assert not proxy_driver.stopped.is_set()
executor._clock.tick(15.1)
proxy_driver.stopped.wait(timeout=0.1)
assert proxy_driver.stopped.is_set()
assert not executor._stop_event.is_set()
def test_gc_killtask_queued():
TASK2_ID = "task2"
proxy_driver = ProxyDriver()
with temporary_dir() as td:
executor = build_blocking_gc_executor(td, proxy_driver)
executor.launchTask(proxy_driver, serialize_art(AdjustRetainedTasks()))
thread_yield()
executor.launchTask(
proxy_driver, serialize_art(AdjustRetainedTasks(),
task_id=TASK2_ID))
thread_yield()
assert len(executor._gc_task_queue) == 1
executor.killTask(proxy_driver, TASK2_ID)
thread_yield()
assert len(executor._gc_task_queue) == 0
assert not proxy_driver.stopped.is_set()
assert len(proxy_driver.updates) == 0
def test_gc_multiple_launchtasks():
TASK2, TASK3 = "task2", "task3"
proxy_driver = ProxyDriver()
with temporary_dir() as td:
executor = build_blocking_gc_executor(td, proxy_driver)
executor.launchTask(proxy_driver, serialize_art(AdjustRetainedTasks()))
thread_yield()
executor.launchTask(
proxy_driver, serialize_art(AdjustRetainedTasks(), task_id=TASK2))
thread_yield()
assert len(executor._gc_task_queue) == 1
executor.launchTask(
proxy_driver, serialize_art(AdjustRetainedTasks(), task_id=TASK3))
thread_yield()
assert len(executor._gc_task_queue) == 1
assert not proxy_driver.stopped.is_set()
assert len(proxy_driver.updates) >= 1
assert StatusUpdate(mesos.TASK_FINISHED, TASK2) in proxy_driver.updates
def test_gc_shutdown_queued():
TASK2_ID = "task2"
proxy_driver = ProxyDriver()
with temporary_dir() as td:
executor = build_blocking_gc_executor(td, proxy_driver)
executor.launchTask(proxy_driver, serialize_art(AdjustRetainedTasks()))
thread_yield()
executor.launchTask(
proxy_driver, serialize_art(AdjustRetainedTasks(),
task_id=TASK2_ID))
thread_yield()
assert len(executor._gc_task_queue) == 1
executor.shutdown(proxy_driver)
executor._clock.tick(executor.PERSISTENCE_WAIT.as_(Time.SECONDS))
assert executor._stop_event.is_set()
proxy_driver.stopped.wait(timeout=1.0)
assert proxy_driver.stopped.is_set()
assert len(proxy_driver.updates) == 1
assert proxy_driver.updates[-1][0] == mesos.TASK_FINISHED
assert proxy_driver.updates[-1][1] == TASK2_ID
def test_gc_killtask_current():
proxy_driver = ProxyDriver()
with temporary_dir() as td:
executor = build_blocking_gc_executor(td, proxy_driver)
executor.launchTask(proxy_driver, serialize_art(AdjustRetainedTasks()))
wait_until_not(lambda: executor._gc_task_queue, clock=executor._clock)
assert len(executor._gc_task_queue) == 0
assert executor._task_id == TASK_ID
executor.killTask(proxy_driver, TASK_ID)
assert executor._task_id == TASK_ID
assert len(executor._gc_task_queue) == 0
assert not proxy_driver.stopped.is_set()
assert len(proxy_driver.updates) == 0
def run_gc_with(active_executors, retained_tasks, lose=False):
proxy_driver = ProxyDriver()
with temporary_dir() as td:
setup_tree(td, lose=lose)
executor = ThinTestThermosGCExecutor(td,
active_executors=active_executors)
executor.registered(proxy_driver, None, None, None)
executor.start()
art = AdjustRetainedTasks(retainedTasks=retained_tasks)
executor.launchTask(proxy_driver, serialize_art(art, TASK_ID))
wait_until_not(lambda: executor._gc_task_queue, clock=executor._clock)
wait_until_not(lambda: executor._task_id, clock=executor._clock)
assert len(executor._gc_task_queue) == 0
assert not executor._task_id
assert len(proxy_driver.updates) >= 1
if not lose: # if the task is lost it will be cleaned out of band (by clean_orphans),
# so we don't care when the GC task actually finishes
assert proxy_driver.updates[-1][0] == mesos.TASK_FINISHED
assert proxy_driver.updates[-1][1] == TASK_ID
return executor, proxy_driver