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from __future__ import annotations
import asyncio
from datetime import timedelta
from time import sleep
import pytest
from distributed import Client, Nanny, Queue, TimeoutError, wait, worker_client
from distributed.metrics import time
from distributed.utils import open_port
from distributed.utils_test import div, gen_cluster, inc, popen
@gen_cluster(client=True)
async def test_queue(c, s, a, b):
x = await Queue("x")
y = await Queue("y")
xx = await Queue("x")
assert x.client is c
future = c.submit(inc, 1)
await x.put(future)
await y.put(future)
future2 = await xx.get()
assert future.key == future2.key
with pytest.raises(TimeoutError):
await x.get(timeout=0.1)
del future, future2
await asyncio.sleep(0.1)
assert s.tasks # future still present in y's queue
await y.get() # burn future
start = time()
while s.tasks:
await asyncio.sleep(0.01)
assert time() < start + 5
@gen_cluster(client=True)
async def test_queue_with_data(c, s, a, b):
x = await Queue("x")
xx = await Queue("x")
assert x.client is c
await x.put((1, "hello"))
data = await xx.get()
assert data == (1, "hello")
with pytest.raises(TimeoutError):
await x.get(timeout=0.1)
def test_sync(client):
future = client.submit(lambda x: x + 1, 10)
x = Queue("x")
xx = Queue("x")
x.put(future)
assert x.qsize() == 1
assert xx.qsize() == 1
future2 = xx.get()
assert future2.result() == 11
@gen_cluster()
async def test_hold_futures(s, a, b):
async with Client(s.address, asynchronous=True) as c1:
future = c1.submit(lambda x: x + 1, 10)
q1 = await Queue("q")
await q1.put(future)
del q1
await asyncio.sleep(0.1)
async with Client(s.address, asynchronous=True) as c1:
q2 = await Queue("q")
future2 = await q2.get()
result = await future2
assert result == 11
@pytest.mark.skip(reason="getting same client from main thread")
@gen_cluster(client=True)
async def test_picklability(c, s, a, b):
q = Queue()
def f(x):
q.put(x + 1)
await c.submit(f, 10)
result = await q.get()
assert result == 11
def test_picklability_sync(client):
q = Queue()
def f(x):
q.put(x + 1)
client.submit(f, 10).result()
assert q.get() == 11
@pytest.mark.slow
@gen_cluster(client=True, nthreads=[("127.0.0.1", 2)] * 5, Worker=Nanny, timeout=60)
async def test_race(c, s, *workers):
def f(i):
with worker_client() as c:
q = Queue("x", client=c)
for _ in range(100):
future = q.get()
x = future.result()
y = c.submit(inc, x)
q.put(y)
sleep(0.01)
result = q.get().result()
return result
q = Queue("x", client=c)
L = await c.scatter(range(5))
for future in L:
await q.put(future)
futures = c.map(f, range(5))
results = await c.gather(futures)
assert all(r > 50 for r in results)
assert sum(results) == 510
qsize = await q.qsize()
assert not qsize
@gen_cluster(client=True)
async def test_same_futures(c, s, a, b):
q = Queue("x")
future = await c.scatter(123)
for _ in range(5):
await q.put(future)
assert {ts.key for ts in s.clients["queue-x"].wants_what} == {future.key}
for _ in range(4):
future2 = await q.get()
assert {ts.key for ts in s.clients["queue-x"].wants_what} == {future.key}
await asyncio.sleep(0.05)
assert {ts.key for ts in s.clients["queue-x"].wants_what} == {future.key}
await q.get()
start = time()
while "queue-x" in s.clients and s.clients["queue-x"].wants_what:
await asyncio.sleep(0.01)
assert time() - start < 2
@gen_cluster(client=True)
async def test_get_many(c, s, a, b):
x = await Queue("x")
xx = await Queue("x")
await x.put(1)
await x.put(2)
await x.put(3)
data = await xx.get(batch=True)
assert data == [1, 2, 3]
await x.put(1)
await x.put(2)
await x.put(3)
data = await xx.get(batch=2)
assert data == [1, 2]
with pytest.raises(TimeoutError):
await asyncio.wait_for(xx.get(batch=2), 0.1)
@gen_cluster(client=True)
async def test_Future_knows_status_immediately(c, s, a, b):
x = await c.scatter(123)
q = await Queue("q")
await q.put(x)
async with Client(s.address, asynchronous=True) as c2:
q2 = await Queue("q", client=c2)
future = await q2.get()
assert future.status == "finished"
x = c.submit(div, 1, 0)
await wait(x)
await q.put(x)
future2 = await q2.get()
assert future2.status == "error"
with pytest.raises(Exception):
await future2
start = time()
while True: # we learn about the true error eventually
try:
await future2
except ZeroDivisionError:
break
except Exception:
assert time() < start + 5
await asyncio.sleep(0.05)
@gen_cluster(client=True)
async def test_erred_future(c, s, a, b):
future = c.submit(div, 1, 0)
q = await Queue()
await q.put(future)
await asyncio.sleep(0.1)
future2 = await q.get()
with pytest.raises(ZeroDivisionError):
await future2.result()
exc = await future2.exception()
assert isinstance(exc, ZeroDivisionError)
@gen_cluster(client=True)
async def test_close(c, s, a, b):
q = await Queue()
q.close()
q.close()
while q.name in s.extensions["queues"].queues:
await asyncio.sleep(0.01)
@gen_cluster(client=True)
async def test_timeout(c, s, a, b):
q = await Queue("v", maxsize=1)
start = time()
with pytest.raises(TimeoutError):
await q.get(timeout="300ms")
stop = time()
assert 0.2 < stop - start < 2.0
await q.put(1)
start = time()
with pytest.raises(TimeoutError):
await q.put(2, timeout=timedelta(seconds=0.3))
stop = time()
assert 0.1 < stop - start < 2.0
@gen_cluster(client=True)
async def test_2220(c, s, a, b):
q = Queue()
def put():
q.put(55)
def get():
print(q.get())
fut = c.submit(put)
res = c.submit(get)
await c.gather([res, fut])
@pytest.mark.isinstalled
def test_queue_in_task(loop):
port = open_port()
# Ensure that we can create a Queue inside a task on a
# worker in a separate Python process than the client
with popen(
[
"dask",
"scheduler",
"--no-dashboard",
f"--port={port}",
]
):
with popen(["dask", "worker", f"127.0.0.1:{port}"]):
with Client(f"tcp://127.0.0.1:{port}", loop=loop) as c:
c.wait_for_workers(1)
x = Queue("x")
x.put(123)
def foo():
y = Queue("x")
return y.get()
result = c.submit(foo).result()
assert result == 123
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