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test_local.py
533 lines (414 loc) · 18.8 KB
/
test_local.py
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from __future__ import print_function, division, absolute_import
from functools import partial
import gc
import subprocess
import sys
from time import sleep
from threading import Lock
import unittest
import weakref
from tornado.ioloop import IOLoop
from tornado import gen
import pytest
from distributed import Client, Worker, Nanny
from distributed.deploy.local import LocalCluster
from distributed.metrics import time
from distributed.utils_test import (inc, gen_test, slowinc,
assert_cannot_connect,
assert_can_connect_locally_4,
assert_can_connect_from_everywhere_4,
assert_can_connect_from_everywhere_4_6,
captured_logger)
from distributed.utils_test import loop # noqa: F401
from distributed.utils import sync
from distributed.worker import TOTAL_MEMORY
from distributed.deploy.utils_test import ClusterTest
def test_simple(loop):
with LocalCluster(4, scheduler_port=0, processes=False, silence_logs=False,
diagnostics_port=None, loop=loop) as c:
with Client(c.scheduler_address, loop=loop) as e:
x = e.submit(inc, 1)
x.result()
assert x.key in c.scheduler.tasks
assert any(w.data == {x.key: 2} for w in c.workers)
@pytest.mark.skipif('sys.version_info[0] == 2', reason='fork issues')
def test_close_twice():
with LocalCluster() as cluster:
with Client(cluster.scheduler_address) as client:
f = client.map(inc, range(100))
client.gather(f)
with captured_logger('tornado.application') as log:
cluster.close()
cluster.close()
sleep(0.5)
log = log.getvalue()
assert not log
@pytest.mark.skipif('sys.version_info[0] == 2', reason='multi-loop')
def test_procs():
with LocalCluster(2, scheduler_port=0, processes=False, threads_per_worker=3,
diagnostics_port=None, silence_logs=False) as c:
assert len(c.workers) == 2
assert all(isinstance(w, Worker) for w in c.workers)
with Client(c.scheduler.address) as e:
assert all(w.ncores == 3 for w in c.workers)
assert all(isinstance(w, Worker) for w in c.workers)
repr(c)
with LocalCluster(2, scheduler_port=0, processes=True, threads_per_worker=3,
diagnostics_port=None, silence_logs=False) as c:
assert len(c.workers) == 2
assert all(isinstance(w, Nanny) for w in c.workers)
with Client(c.scheduler.address) as e:
assert all(v == 3 for v in e.ncores().values())
c.start_worker()
assert all(isinstance(w, Nanny) for w in c.workers)
repr(c)
def test_move_unserializable_data():
"""
Test that unserializable data is still fine to transfer over inproc
transports.
"""
with LocalCluster(processes=False, silence_logs=False,
diagnostics_port=None) as cluster:
assert cluster.scheduler_address.startswith('inproc://')
assert cluster.workers[0].address.startswith('inproc://')
with Client(cluster) as client:
lock = Lock()
x = client.scatter(lock)
y = client.submit(lambda x: x, x)
assert y.result() is lock
def test_transports():
"""
Test the transport chosen by LocalCluster depending on arguments.
"""
with LocalCluster(1, processes=False, silence_logs=False,
diagnostics_port=None) as c:
assert c.scheduler_address.startswith('inproc://')
assert c.workers[0].address.startswith('inproc://')
with Client(c.scheduler.address) as e:
assert e.submit(inc, 4).result() == 5
# Have nannies => need TCP
with LocalCluster(1, processes=True, silence_logs=False,
diagnostics_port=None) as c:
assert c.scheduler_address.startswith('tcp://')
assert c.workers[0].address.startswith('tcp://')
with Client(c.scheduler.address) as e:
assert e.submit(inc, 4).result() == 5
# Scheduler port specified => need TCP
with LocalCluster(1, processes=False, scheduler_port=8786, silence_logs=False,
diagnostics_port=None) as c:
assert c.scheduler_address == 'tcp://127.0.0.1:8786'
assert c.workers[0].address.startswith('tcp://')
with Client(c.scheduler.address) as e:
assert e.submit(inc, 4).result() == 5
@pytest.mark.skipif('sys.version_info[0] == 2', reason='')
class LocalTest(ClusterTest, unittest.TestCase):
Cluster = partial(LocalCluster, silence_logs=False, diagnostics_port=None)
kwargs = {'diagnostics_port': None}
@pytest.mark.skipif('sys.version_info[0] == 2', reason='')
def test_Client_with_local(loop):
with LocalCluster(1, scheduler_port=0, silence_logs=False,
diagnostics_port=None, loop=loop) as c:
with Client(c, loop=loop) as e:
assert len(e.ncores()) == len(c.workers)
assert c.scheduler_address in repr(c)
def test_Client_solo(loop):
with Client(loop=loop, silence_logs=False) as c:
pass
assert c.cluster.status == 'closed'
@gen_test()
def test_duplicate_clients():
c1 = yield Client(processes=False, silence_logs=False, diagnostics_port=9876)
with pytest.warns(Exception) as info:
c2 = yield Client(processes=False, silence_logs=False, diagnostics_port=9876)
assert 'bokeh' in c1.cluster.scheduler.services
assert 'bokeh' in c2.cluster.scheduler.services
assert any(all(word in str(msg.message).lower()
for word in ['9876', 'running', 'already in use'])
for msg in info.list)
yield c1.close()
def test_Client_kwargs(loop):
with Client(loop=loop, processes=False, n_workers=2, silence_logs=False) as c:
assert len(c.cluster.workers) == 2
assert all(isinstance(w, Worker) for w in c.cluster.workers)
assert c.cluster.status == 'closed'
def test_Client_twice(loop):
with Client(loop=loop, silence_logs=False, diagnostics_port=None) as c:
with Client(loop=loop, silence_logs=False, diagnostics_port=None) as f:
assert c.cluster.scheduler.port != f.cluster.scheduler.port
@pytest.mark.skipif('sys.version_info[0] == 2', reason='fork issues')
def test_defaults():
from distributed.worker import _ncores
with LocalCluster(scheduler_port=0, silence_logs=False,
diagnostics_port=None) as c:
assert sum(w.ncores for w in c.workers) == _ncores
assert all(isinstance(w, Nanny) for w in c.workers)
assert all(w.ncores == 1 for w in c.workers)
with LocalCluster(processes=False, scheduler_port=0, silence_logs=False,
diagnostics_port=None) as c:
assert sum(w.ncores for w in c.workers) == _ncores
assert all(isinstance(w, Worker) for w in c.workers)
assert len(c.workers) == 1
with LocalCluster(n_workers=2, scheduler_port=0, silence_logs=False,
diagnostics_port=None) as c:
if _ncores % 2 == 0:
expected_total_threads = max(2, _ncores)
else:
# n_workers not a divisor of _ncores => threads are overcommitted
expected_total_threads = max(2, _ncores + 1)
assert sum(w.ncores for w in c.workers) == expected_total_threads
with LocalCluster(threads_per_worker=_ncores * 2, scheduler_port=0,
silence_logs=False, diagnostics_port=None) as c:
assert len(c.workers) == 1
with LocalCluster(n_workers=_ncores * 2, scheduler_port=0,
silence_logs=False, diagnostics_port=None) as c:
assert all(w.ncores == 1 for w in c.workers)
with LocalCluster(threads_per_worker=2, n_workers=3, scheduler_port=0,
silence_logs=False, diagnostics_port=None) as c:
assert len(c.workers) == 3
assert all(w.ncores == 2 for w in c.workers)
def test_worker_params():
with LocalCluster(n_workers=2, scheduler_port=0, silence_logs=False,
diagnostics_port=None, memory_limit=500) as c:
assert [w.memory_limit for w in c.workers] == [500] * 2
def test_memory_limit_none():
with LocalCluster(n_workers=2, scheduler_port=0, silence_logs=False,
processes=False, diagnostics_port=None, memory_limit=None) as c:
w = c.workers[0]
assert type(w.data) is dict
assert w.memory_limit is None
def test_cleanup():
c = LocalCluster(2, scheduler_port=0, silence_logs=False,
diagnostics_port=None)
port = c.scheduler.port
c.close()
c2 = LocalCluster(2, scheduler_port=port, silence_logs=False,
diagnostics_port=None)
c.close()
def test_repeated():
with LocalCluster(scheduler_port=8448, silence_logs=False,
diagnostics_port=None) as c:
pass
with LocalCluster(scheduler_port=8448, silence_logs=False,
diagnostics_port=None) as c:
pass
@pytest.mark.parametrize('processes', [True, False])
def test_bokeh(loop, processes):
pytest.importorskip('bokeh')
requests = pytest.importorskip('requests')
with LocalCluster(scheduler_port=0, silence_logs=False, loop=loop,
processes=processes, diagnostics_port=0) as c:
bokeh_port = c.scheduler.services['bokeh'].port
url = 'http://127.0.0.1:%d/status/' % bokeh_port
start = time()
while True:
response = requests.get(url)
if response.ok:
break
assert time() < start + 20
sleep(0.01)
# 'localhost' also works
response = requests.get('http://localhost:%d/status/' % bokeh_port)
assert response.ok
with pytest.raises(requests.RequestException):
requests.get(url, timeout=0.2)
@pytest.mark.skipif(sys.version_info < (3, 6), reason='Unknown')
def test_blocks_until_full(loop):
with Client(loop=loop) as c:
assert len(c.ncores()) > 0
@gen_test()
def test_scale_up_and_down():
loop = IOLoop.current()
cluster = yield LocalCluster(0, scheduler_port=0, processes=False,
silence_logs=False, diagnostics_port=None,
loop=loop, asynchronous=True)
c = yield Client(cluster, loop=loop, asynchronous=True)
assert not cluster.workers
yield cluster.scale_up(2)
assert len(cluster.workers) == 2
assert len(cluster.scheduler.ncores) == 2
addr = cluster.workers[0].address
yield cluster.scale_down([addr])
assert len(cluster.workers) == 1
assert addr not in cluster.scheduler.ncores
yield c.close()
yield cluster.close()
def test_silent_startup():
code = """if 1:
from time import sleep
from distributed import LocalCluster
with LocalCluster(1, diagnostics_port=None, scheduler_port=0):
sleep(1.5)
"""
out = subprocess.check_output([sys.executable, "-Wi", "-c", code],
stderr=subprocess.STDOUT)
out = out.decode()
try:
assert not out
except AssertionError:
print("=== Cluster stdout / stderr ===")
print(out)
raise
def test_only_local_access(loop):
with LocalCluster(scheduler_port=0, silence_logs=False,
diagnostics_port=None, loop=loop) as c:
sync(loop, assert_can_connect_locally_4, c.scheduler.port)
def test_remote_access(loop):
with LocalCluster(scheduler_port=0, silence_logs=False,
diagnostics_port=None, ip='', loop=loop) as c:
sync(loop, assert_can_connect_from_everywhere_4_6, c.scheduler.port)
def test_memory(loop):
with LocalCluster(scheduler_port=0, processes=False, silence_logs=False,
diagnostics_port=None, loop=loop) as cluster:
assert sum(w.memory_limit for w in cluster.workers) <= TOTAL_MEMORY
def test_memory_nanny(loop):
with LocalCluster(scheduler_port=0, processes=True, silence_logs=False,
diagnostics_port=None, loop=loop) as cluster:
with Client(cluster.scheduler_address, loop=loop) as c:
info = c.scheduler_info()
assert (sum(w['memory_limit'] for w in info['workers'].values())
<= TOTAL_MEMORY)
def test_death_timeout_raises(loop):
with pytest.raises(gen.TimeoutError):
with LocalCluster(scheduler_port=0, silence_logs=False,
death_timeout=1e-10, diagnostics_port=None,
loop=loop) as cluster:
pass
@pytest.mark.skipif(sys.version_info < (3, 6), reason='Unknown')
def test_bokeh_kwargs(loop):
pytest.importorskip('bokeh')
with LocalCluster(scheduler_port=0, silence_logs=False, loop=loop,
diagnostics_port=0,
service_kwargs={'bokeh': {'prefix': '/foo'}}) as c:
bs = c.scheduler.services['bokeh']
assert bs.prefix == '/foo'
def test_io_loop_periodic_callbacks(loop):
with LocalCluster(loop=loop, silence_logs=False) as cluster:
assert cluster.scheduler.loop is loop
for pc in cluster.scheduler.periodic_callbacks.values():
assert pc.io_loop is loop
for worker in cluster.workers:
for pc in worker.periodic_callbacks.values():
assert pc.io_loop is loop
def test_logging():
"""
Workers and scheduler have logs even when silenced
"""
with LocalCluster(1, processes=False, diagnostics_port=None) as c:
assert c.scheduler._deque_handler.deque
assert c.workers[0]._deque_handler.deque
def test_ipywidgets(loop):
ipywidgets = pytest.importorskip('ipywidgets')
with LocalCluster(scheduler_port=0, silence_logs=False, loop=loop,
diagnostics_port=False, processes=False) as cluster:
cluster._ipython_display_()
box = cluster._cached_widget
assert isinstance(box, ipywidgets.Widget)
def test_scale(loop):
""" Directly calling scale both up and down works as expected """
with LocalCluster(scheduler_port=0, silence_logs=False, loop=loop,
diagnostics_port=False, processes=False, n_workers=0) as cluster:
assert not cluster.scheduler.workers
cluster.scale(3)
start = time()
while len(cluster.scheduler.workers) != 3:
sleep(0.01)
assert time() < start + 5, len(cluster.scheduler.workers)
sleep(0.2) # let workers settle # TODO: remove need for this
cluster.scale(2)
start = time()
while len(cluster.scheduler.workers) != 2:
sleep(0.01)
assert time() < start + 5, len(cluster.scheduler.workers)
def test_adapt(loop):
with LocalCluster(scheduler_port=0, silence_logs=False, loop=loop,
diagnostics_port=False, processes=False, n_workers=0) as cluster:
cluster.adapt(minimum=0, maximum=2, interval='10ms')
assert cluster._adaptive.minimum == 0
assert cluster._adaptive.maximum == 2
ref = weakref.ref(cluster._adaptive)
cluster.adapt(minimum=1, maximum=2, interval='10ms')
assert cluster._adaptive.minimum == 1
gc.collect()
# the old Adaptive class sticks around, not sure why
# start = time()
# while ref():
# sleep(0.01)
# gc.collect()
# assert time() < start + 5
start = time()
while len(cluster.scheduler.workers) != 1:
sleep(0.01)
assert time() < start + 5
def test_adapt_then_manual(loop):
""" We can revert from adaptive, back to manual """
with LocalCluster(scheduler_port=0, silence_logs=False, loop=loop,
diagnostics_port=False, processes=False, n_workers=8) as cluster:
sleep(0.1)
cluster.adapt(minimum=0, maximum=4, interval='10ms')
start = time()
while cluster.scheduler.workers or cluster.workers:
sleep(0.1)
assert time() < start + 5
assert not cluster.workers
with Client(cluster) as client:
futures = client.map(slowinc, range(1000), delay=0.1)
sleep(0.2)
cluster._adaptive.stop()
sleep(0.2)
cluster.scale(2)
start = time()
while len(cluster.scheduler.workers) != 2:
sleep(0.1)
assert time() < start + 5
def test_local_tls(loop):
from distributed.utils_test import tls_only_security
security = tls_only_security()
with LocalCluster(scheduler_port=8786, silence_logs=False, security=security,
diagnostics_port=False, ip='tls://0.0.0.0', loop=loop) as c:
sync(loop, assert_can_connect_from_everywhere_4, c.scheduler.port,
connection_args=security.get_connection_args('client'),
protocol='tls', timeout=3)
# If we connect to a TLS localculster without ssl information we should fail
sync(loop, assert_cannot_connect,
addr='tcp://127.0.0.1:%d' % c.scheduler.port,
connection_args=security.get_connection_args('client'),
exception_class=RuntimeError,
)
@gen_test()
def test_scale_retires_workers():
class MyCluster(LocalCluster):
def scale_down(self, *args, **kwargs):
pass
loop = IOLoop.current()
cluster = yield MyCluster(0, scheduler_port=0, processes=False,
silence_logs=False, diagnostics_port=None,
loop=loop, asynchronous=True)
c = yield Client(cluster, loop=loop, asynchronous=True)
assert not cluster.workers
yield cluster.scale(2)
start = time()
while len(cluster.scheduler.workers) != 2:
yield gen.sleep(0.01)
assert time() < start + 3
yield cluster.scale(1)
start = time()
while len(cluster.scheduler.workers) != 1:
yield gen.sleep(0.01)
assert time() < start + 3
yield c.close()
yield cluster.close()
def test_local_tls_restart(loop):
from distributed.utils_test import tls_only_security
security = tls_only_security()
with LocalCluster(n_workers=1, scheduler_port=8786, silence_logs=False, security=security,
diagnostics_port=False, ip='tls://0.0.0.0', loop=loop) as c:
with Client(c.scheduler.address, loop=loop, security=security) as client:
print(c.workers, c.workers[0].address)
workers_before = set(client.scheduler_info()['workers'])
assert client.submit(inc, 1).result() == 2
client.restart()
workers_after = set(client.scheduler_info()['workers'])
assert client.submit(inc, 2).result() == 3
assert workers_before != workers_after
if sys.version_info >= (3, 5):
from distributed.deploy.tests.py3_test_deploy import * # noqa F401