class TrialRunnerTest(unittest.TestCase):
def setUp(self):
self.cluster = Cluster(
initialize_head=True,
connect=True,
head_node_args={
"num_cpus": 4,
"num_gpus": 1,
})
self.cluster.add_node(num_cpus=2, num_gpus=1)
self.cluster.wait_for_nodes()
def tearDown(self):
ray.shutdown()
self.cluster.shutdown()
def testAvailableResources(self):
assert len(nodes()) == 2
assert default_device(refresh=True) == "GPU"
def testOthersTakingResources(self):
# Let someone occupy the head node
pg = placement_group([{"CPU": 4, "GPU": 1}])
ray.get(pg.ready())
# We are left with the second node
assert len(nodes()) == 1
assert default_device(refresh=True) == "GPU"
pg = placement_group([{"GPU": 1}])
ray.get(pg.ready())
# Default device should be CPU
assert default_device(refresh=True) == "CPU"
assert len(nodes()) == 1
def test_namespace_client():
cluster = Cluster()
cluster.add_node(num_cpus=4, ray_client_server_port=8080)
cluster.wait_for_nodes(1)
template = """
import ray
ray.util.connect("{address}", namespace="{namespace}")
@ray.remote
class DetachedActor:
def ping(self):
return "pong from other job"
actor = DetachedActor.options(name="Pinger", lifetime="detached").remote()
ray.get(actor.ping.remote())
print("Done!!!")
"""
print(
run_string_as_driver(
template.format(address="localhost:8080", namespace="test")))
ray.util.connect("localhost:8080", namespace="test")
pinger = ray.get_actor("Pinger")
assert ray.get(pinger.ping.remote()) == "pong from other job"
ray.util.disconnect()
cluster.shutdown()
# This piece of cleanup doesn't seem to happen automatically.
ray._private.client_mode_hook._explicitly_disable_client_mode()
def build_cluster(num_nodes, num_cpus, object_store_memory):
cluster = Cluster()
for _ in range(num_nodes):
cluster.add_node(num_cpus=num_cpus,
object_store_memory=object_store_memory)
cluster.wait_for_nodes()
return cluster
def test_pull_request_retry(shutdown_only):
cluster = Cluster()
cluster.add_node(num_cpus=0, num_gpus=1, object_store_memory=100 * 2**20)
cluster.add_node(num_cpus=1, num_gpus=0, object_store_memory=100 * 2**20)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
@ray.remote
def put():
return np.zeros(64 * 2**20, dtype=np.int8)
@ray.remote(num_cpus=0, num_gpus=1)
def driver():
local_ref = ray.put(np.zeros(64 * 2**20, dtype=np.int8))
remote_ref = put.remote()
ready, _ = ray.wait([remote_ref], timeout=30)
assert len(ready) == 1
del local_ref
# This should always complete within 10 seconds.
ready, _ = ray.wait([remote_ref], timeout=20)
assert len(ready) > 0
# Pretend the GPU node is the driver. We do this to force the placement of
# the driver and `put` task on different nodes.
ray.get(driver.remote())
def test_task_args(shutdown_only):
cluster = Cluster()
cluster.add_node(
num_cpus=1,
object_store_memory=80 * 1024 * 1024,
_system_config={
"local_fs_capacity_threshold": 0,
},
resources={"out_of_memory": 1},
)
cluster.add_node(
num_cpus=1,
object_store_memory=200 * 1024 * 1024,
resources={"sufficient_memory": 1},
)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
@ray.remote
def foo():
return np.random.rand(20 * 1024 * 1024) # 160 MB data
@ray.remote
def bar(obj):
print(obj)
ref = foo.options(resources={"sufficient_memory": 1}).remote()
try:
ray.get(bar.options(resources={"out_of_memory": 1}).remote(ref))
except ray.exceptions.RayTaskError as e:
assert isinstance(e.cause, ray.exceptions.OutOfDiskError)
def test_pull_bundles_admission_control(shutdown_only):
cluster = Cluster()
object_size = int(6e6)
num_objects = 10
num_tasks = 10
# Head node can fit all of the objects at once.
cluster.add_node(num_cpus=0,
object_store_memory=2 * num_tasks * num_objects *
object_size)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
# Worker node can only fit 1 task at a time.
cluster.add_node(num_cpus=1,
object_store_memory=1.5 * num_objects * object_size)
cluster.wait_for_nodes()
@ray.remote
def foo(*args):
return
args = []
for _ in range(num_tasks):
task_args = [
ray.put(np.zeros(object_size, dtype=np.uint8))
for _ in range(num_objects)
]
args.append(task_args)
tasks = [foo.remote(*task_args) for task_args in args]
ray.get(tasks)
def test_basic_reconstruction_put(ray_start_cluster, reconstruction_enabled):
config = json.dumps({
"num_heartbeats_timeout":
10,
"raylet_heartbeat_timeout_milliseconds":
100,
"lineage_pinning_enabled":
1 if reconstruction_enabled else 0,
"free_objects_period_milliseconds":
-1,
})
cluster = Cluster()
# Head node with no resources.
cluster.add_node(num_cpus=0, _internal_config=config)
# Node to place the initial object.
node_to_kill = cluster.add_node(num_cpus=1,
resources={"node1": 1},
object_store_memory=10**8,
_internal_config=config)
cluster.add_node(num_cpus=1,
resources={"node2": 1},
object_store_memory=10**8,
_internal_config=config)
cluster.wait_for_nodes()
ray.init(address=cluster.address, _internal_config=config)
@ray.remote(max_retries=1 if reconstruction_enabled else 0)
def large_object():
return np.zeros(10**7, dtype=np.uint8)
@ray.remote
def dependent_task(x):
return x
obj = ray.put(np.zeros(10**7, dtype=np.uint8))
result = dependent_task.options(resources={"node1": 1}).remote(obj)
ray.get(result)
del obj
cluster.remove_node(node_to_kill, allow_graceful=False)
cluster.add_node(num_cpus=1,
resources={"node1": 1},
object_store_memory=10**8,
_internal_config=config)
for _ in range(20):
ray.put(np.zeros(10**7, dtype=np.uint8))
if reconstruction_enabled:
ray.get(result)
else:
with pytest.raises(ray.exceptions.UnreconstructableError):
ray.get(result)
def test_actor(shutdown_only):
cluster = Cluster()
cluster.add_node(
num_cpus=1,
object_store_memory=80 * 1024 * 1024,
_system_config={
"local_fs_capacity_threshold": 0,
},
resources={"out_of_memory": 1},
)
cluster.add_node(
num_cpus=1,
object_store_memory=200 * 1024 * 1024,
resources={"sufficient_memory": 1},
)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
@ray.remote
def foo():
return np.random.rand(20 * 1024 * 1024) # 160 MB data
@ray.remote
class Actor:
def __init__(self, obj):
self._obj = obj
def foo(self):
print(self._obj)
def args_ood(self, obj):
print(obj)
def return_ood(self):
return np.random.rand(20 * 1024 * 1024)
ref = foo.options(resources={"sufficient_memory": 1}).remote()
with pytest.raises(ray.exceptions.RayActorError):
a = Actor.options(resources={"out_of_memory": 0.001}).remote(ref)
ray.get(a.foo.remote())
a = Actor.options(resources={"out_of_memory": 1}).remote(1)
ray.get(a.foo.remote())
try:
ray.get(a.args_ood.remote(ref))
except ray.exceptions.RayTaskError as e:
assert isinstance(e.cause, ray.exceptions.OutOfDiskError)
ray.get(a.foo.remote())
try:
ray.get(a.return_ood.remote())
except ray.exceptions.RayTaskError as e:
assert isinstance(e.cause, ray.exceptions.OutOfDiskError)
def test_reconstruction_chain(ray_start_cluster, reconstruction_enabled):
config = json.dumps({
"num_heartbeats_timeout":
10,
"raylet_heartbeat_timeout_milliseconds":
100,
"lineage_pinning_enabled":
1 if reconstruction_enabled else 0,
"free_objects_period_milliseconds":
-1,
})
cluster = Cluster()
# Head node with no resources.
cluster.add_node(num_cpus=0,
_internal_config=config,
object_store_memory=10**8)
node_to_kill = cluster.add_node(num_cpus=1,
object_store_memory=10**8,
_internal_config=config)
cluster.wait_for_nodes()
ray.init(address=cluster.address, _internal_config=config)
@ray.remote(max_retries=1 if reconstruction_enabled else 0)
def large_object():
return np.zeros(10**7, dtype=np.uint8)
@ray.remote
def chain(x):
return x
@ray.remote
def dependent_task(x):
return x
obj = large_object.remote()
for _ in range(20):
obj = chain.remote(obj)
ray.get(dependent_task.remote(obj))
cluster.remove_node(node_to_kill, allow_graceful=False)
cluster.add_node(num_cpus=1,
object_store_memory=10**8,
_internal_config=config)
if reconstruction_enabled:
ray.get(dependent_task.remote(obj))
else:
with pytest.raises(ray.exceptions.RayTaskError) as e:
ray.get(dependent_task.remote(obj))
with pytest.raises(ray.exceptions.UnreconstructableError):
raise e.as_instanceof_cause()
def test_namespace():
"""
Most of the "checks" in this test case rely on the fact that
`run_string_as_driver` will throw an exception if the driver string exits
with a non-zero exit code (e.g. when the driver scripts throws an
exception). Since all of these drivers start named, detached actors, the
most likely failure case would be a collision of named actors if they're
put in the same namespace.
This test checks that:
* When two drivers don't specify a namespace, they are placed in different
anonymous namespaces.
* When two drivers specify a namespace, they collide.
* The namespace name (as provided by the runtime context) is correct.
"""
cluster = Cluster()
cluster.add_node(num_cpus=4, ray_client_server_port=50055)
cluster.wait_for_nodes(1)
template = """
import ray
ray.client("localhost:50055").namespace({namespace}).connect()
@ray.remote
class Foo:
def ping(self):
return "pong"
a = Foo.options(lifetime="detached", name="abc").remote()
ray.get(a.ping.remote())
print(ray.get_runtime_context().namespace)
"""
anon_driver = template.format(namespace="None")
run_string_as_driver(anon_driver)
# This second run will fail if the actors don't run in separate anonymous
# namespaces.
run_string_as_driver(anon_driver)
run_in_namespace = template.format(namespace="'namespace'")
script_namespace = run_string_as_driver(run_in_namespace)
# The second run fails because the actors are run in the same namespace.
with pytest.raises(subprocess.CalledProcessError):
run_string_as_driver(run_in_namespace)
assert script_namespace.strip() == "namespace"
subprocess.check_output("ray stop --force", shell=True)
def test_pull_bundles_admission_control_dynamic(shutdown_only):
# This test is the same as test_pull_bundles_admission_control, except that
# the object store's capacity starts off higher and is later consumed
# dynamically by concurrent workers.
cluster = Cluster()
object_size = int(6e6)
num_objects = 20
num_tasks = 20
# Head node can fit all of the objects at once.
cluster.add_node(num_cpus=0,
object_store_memory=2 * num_tasks * num_objects *
object_size)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
# Worker node can fit 2 tasks at a time.
cluster.add_node(num_cpus=1,
object_store_memory=2.5 * num_objects * object_size)
cluster.wait_for_nodes()
@ray.remote
def foo(i, *args):
print("foo", i)
return
@ray.remote
def allocate(i):
print("allocate", i)
return np.zeros(object_size, dtype=np.uint8)
args = []
for _ in range(num_tasks):
task_args = [
ray.put(np.zeros(object_size, dtype=np.uint8))
for _ in range(num_objects)
]
args.append(task_args)
allocated = [allocate.remote(i) for i in range(num_objects)]
ray.get(allocated)
tasks = [foo.remote(i, *task_args) for i, task_args in enumerate(args)]
ray.get(tasks)
del allocated
def test_system_config_when_connecting(ray_start_cluster):
config = {"object_timeout_milliseconds": 200}
cluster = Cluster()
cluster.add_node(_system_config=config, object_store_memory=100 * 1024 * 1024)
cluster.wait_for_nodes()
# Specifying _system_config when connecting to a cluster is disallowed.
with pytest.raises(ValueError):
ray.init(address=cluster.address, _system_config=config)
# Check that the config was picked up (object pinning is disabled).
ray.init(address=cluster.address)
obj_ref = ray.put(np.zeros(40 * 1024 * 1024, dtype=np.uint8))
for _ in range(5):
put_ref = ray.put(np.zeros(40 * 1024 * 1024, dtype=np.uint8))
del put_ref
ray.get(obj_ref)
def test_cached_object(ray_start_cluster):
config = json.dumps({
"num_heartbeats_timeout": 10,
"raylet_heartbeat_timeout_milliseconds": 100,
})
cluster = Cluster()
# Head node with no resources.
cluster.add_node(num_cpus=0, _internal_config=config)
# Node to place the initial object.
node_to_kill = cluster.add_node(num_cpus=1,
resources={"node1": 1},
object_store_memory=10**8)
cluster.add_node(num_cpus=1,
resources={"node2": 1},
object_store_memory=10**8)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
@ray.remote
def large_object():
return np.zeros(10**7, dtype=np.uint8)
@ray.remote
def dependent_task(x):
return
obj = large_object.options(resources={"node1": 1}).remote()
ray.get(dependent_task.options(resources={"node2": 1}).remote(obj))
cluster.remove_node(node_to_kill, allow_graceful=False)
cluster.add_node(num_cpus=1,
resources={"node1": 1},
object_store_memory=10**8)
assert wait_for_condition(lambda: not all(node["Alive"]
for node in ray.nodes()),
timeout=10)
for _ in range(20):
large_object.options(resources={"node2": 1}).remote()
ray.get(dependent_task.remote(obj))
def run_multi_nodes():
c = Cluster()
c.add_node(num_cpus=4,
object_store_memory=object_store_size,
_system_config=system_config)
ray.init(address=c.address)
for _ in range(num_nodes - 1): # subtract a head node.
c.add_node(num_cpus=4, object_store_memory=object_store_size)
c.wait_for_nodes()
# Run shuffle.
print(
f"\n\nTest streaming shuffle with {num_nodes} nodes.\n"
f"Shuffle size: {partition_size * num_partitions / 1024 / 1024 / 1024}"
"GB")
run_shuffle()
time.sleep(5)
display_spilling_info(c.address)
ray.shutdown()
c.shutdown()
time.sleep(5)
def test_pull_bundles_pinning(shutdown_only):
cluster = Cluster()
object_size = int(50e6)
num_objects = 10
# Head node can fit all of the objects at once.
cluster.add_node(num_cpus=0, object_store_memory=1000e6)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
# Worker node cannot even fit a single task.
cluster.add_node(num_cpus=1, object_store_memory=200e6)
cluster.wait_for_nodes()
@ray.remote(num_cpus=1)
def foo(*args):
return
task_args = [
ray.put(np.zeros(object_size, dtype=np.uint8))
for _ in range(num_objects)
]
ray.get(foo.remote(*task_args))
def test_ray_get_task_args_deadlock(shutdown_only):
cluster = Cluster()
object_size = int(6e6)
num_objects = 10
# Head node can fit all of the objects at once.
cluster.add_node(num_cpus=0,
object_store_memory=4 * num_objects * object_size)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
# Worker node can only fit 1 task at a time.
cluster.add_node(num_cpus=1,
object_store_memory=1.5 * num_objects * object_size)
cluster.wait_for_nodes()
@ray.remote
def foo(*args):
return
@ray.remote
def test_deadlock(get_args, task_args):
foo.remote(*task_args)
ray.get(get_args)
for i in range(5):
start = time.time()
get_args = [
ray.put(np.zeros(object_size, dtype=np.uint8))
for _ in range(num_objects)
]
task_args = [
ray.put(np.zeros(object_size, dtype=np.uint8))
for _ in range(num_objects)
]
ray.get(test_deadlock.remote(get_args, task_args))
print(f"round {i} finished in {time.time() - start}")
# This number should be divisible by 3.
resource_quantity = 999
num_nodes = 5
custom_resources = {"pg_custom": resource_quantity}
# Create pg that uses 1 resource of cpu & custom resource.
num_pg = resource_quantity
# TODO(sang): Cluster setup. Remove when running in real clusters.
cluster = Cluster()
nodes = []
for _ in range(num_nodes):
nodes.append(
cluster.add_node(num_cpus=3,
num_gpus=resource_quantity,
resources=custom_resources))
cluster.wait_for_nodes()
ray.init(address=cluster.address)
while not ray.is_initialized():
time.sleep(0.1)
# Scenario 1: Create bunch of placement groups and measure how long it takes.
total_creating_time = 0
total_removing_time = 0
repeat = 1
total_trial = repeat * num_pg
bundles = [{"GPU": 1, "pg_custom": 1}] * num_nodes
# Create and remove placement groups.
for _ in range(repeat):
pgs = []
class RayExecutorQueueTest(unittest.TestCase):
def setUp(self):
self.cluster = Cluster(initialize_head=True,
connect=True,
head_node_args={
"num_cpus": 1,
"_system_config": {
"num_heartbeats_timeout": 10
}
})
self.trial_executor = RayTrialExecutor(queue_trials=True,
refresh_period=0)
# Pytest doesn't play nicely with imports
_register_all()
def tearDown(self):
ray.shutdown()
self.cluster.shutdown()
_register_all() # re-register the evicted objects
def testQueueTrial(self):
"""Tests that reset handles NotImplemented properly."""
def create_trial(cpu, gpu=0):
return Trial("__fake", resources=Resources(cpu=cpu, gpu=gpu))
cpu_only = create_trial(1, 0)
self.assertTrue(self.trial_executor.has_resources_for_trial(cpu_only))
self.trial_executor.start_trial(cpu_only)
gpu_only = create_trial(0, 1)
self.assertTrue(self.trial_executor.has_resources_for_trial(gpu_only))
def testHeadBlocking(self):
# Once resource requests are deprecated, remove this test
os.environ["TUNE_PLACEMENT_GROUP_AUTO_DISABLED"] = "1"
def create_trial(cpu, gpu=0):
return Trial("__fake", resources=Resources(cpu=cpu, gpu=gpu))
gpu_trial = create_trial(1, 1)
self.assertTrue(self.trial_executor.has_resources_for_trial(gpu_trial))
self.trial_executor.start_trial(gpu_trial)
# TODO(rliaw): This behavior is probably undesirable, but right now
# trials with different resource requirements is not often used.
cpu_only_trial = create_trial(1, 0)
self.assertFalse(
self.trial_executor.has_resources_for_trial(cpu_only_trial))
self.cluster.add_node(num_cpus=1, num_gpus=1)
self.cluster.wait_for_nodes()
self.assertTrue(
self.trial_executor.has_resources_for_trial(cpu_only_trial))
self.trial_executor.start_trial(cpu_only_trial)
cpu_only_trial2 = create_trial(1, 0)
self.assertTrue(
self.trial_executor.has_resources_for_trial(cpu_only_trial2))
self.trial_executor.start_trial(cpu_only_trial2)
cpu_only_trial3 = create_trial(1, 0)
self.assertFalse(
self.trial_executor.has_resources_for_trial(cpu_only_trial3))
2,
"object_spilling_config":
json.dumps(
{
"type": "filesystem",
"params": {
"directory_path": "/tmp/spill"
}
},
separators=(",", ":"))
})
# Add fake 4 nodes cluster.
for _ in range(num_nodes - 1): # subtract a head node.
c.add_node(num_cpus=4, object_store_memory=object_store_size)
c.wait_for_nodes()
ray.init(address=c.address)
@ray.remote
class Counter:
def __init__(self):
self.num_map = 0
self.num_reduce = 0
def inc(self):
self.num_map += 1
print("Num map tasks finished", self.num_map)
def inc2(self):
self.num_reduce += 1
def test_locality_aware_scheduling_for_dead_nodes(shutdown_only):
"""Test that locality-ware scheduling can handle dead nodes."""
# Create a cluster with 4 nodes.
config = {
"num_heartbeats_timeout": 5,
"raylet_heartbeat_period_milliseconds": 50,
}
cluster = Cluster()
cluster.add_node(num_cpus=4, resources={"node1": 1}, _system_config=config)
cluster.wait_for_nodes()
ray.init(address=cluster.address)
node2 = cluster.add_node(num_cpus=4, resources={"node2": 1})
node3 = cluster.add_node(num_cpus=4, resources={"node3": 1})
node4 = cluster.add_node(num_cpus=4, resources={"node4": 1})
cluster.wait_for_nodes()
# Create 2 objects on node 2.
@ray.remote(resources={"node2": 0.1})
def create_object():
return np.zeros(10 * 1024 * 1024, dtype=np.uint8)
obj1 = create_object.remote()
obj2 = create_object.remote()
# Push these 2 objects to other nodes.
# node2 will have obj1 and obj2.
# node3 will have obj1.
# node4 will have obj2.
@ray.remote
class MyActor:
def __init__(self, obj_refs):
# Note, we need to keep obj_refs to prevent the objects from
# being garbage collected.
self.obj_refs = obj_refs
self.obj = ray.get(obj_refs)
def ready(self):
return True
actors = [
MyActor.options(resources={
"node2": 0.1
}).remote([obj1, obj2]),
MyActor.options(resources={
"node3": 0.1
}).remote([obj1]),
MyActor.options(resources={
"node4": 0.1
}).remote([obj2]),
]
assert all(ray.get(actor.ready.remote()) is True for actor in actors)
# This function requires obj1 and obj2.
@ray.remote
def func(obj1, obj2):
return ray.worker.global_worker.node.unique_id
# This function should be scheduled to node2. As node2 has both objects.
assert ray.get(func.remote(obj1, obj2)) == node2.unique_id
# Kill node2, and re-schedule the function.
# It should be scheduled to either node3 or node4.
node2.kill_raylet()
# Waits for the driver to receive the NodeRemoved notification.
time.sleep(1)
target_node = ray.get(func.remote(obj1, obj2))
assert target_node == node3.unique_id or target_node == node4.unique_id
def test_fate_sharing(ray_start_cluster):
config = json.dumps({
"num_heartbeats_timeout": 10,
"raylet_heartbeat_timeout_milliseconds": 100,
})
cluster = Cluster()
# Head node with no resources.
cluster.add_node(num_cpus=0, _internal_config=config)
# Node to place the parent actor.
node_to_kill = cluster.add_node(num_cpus=1, resources={"parent": 1})
# Node to place the child actor.
cluster.add_node(num_cpus=1, resources={"child": 1})
cluster.wait_for_nodes()
ray.init(address=cluster.address)
@ray.remote
def sleep():
time.sleep(1000)
@ray.remote(resources={"child": 1})
def probe():
return
@ray.remote
class Actor(object):
def __init__(self):
return
def start_child(self, use_actors):
if use_actors:
child = Actor.options(resources={"child": 1}).remote()
ray.get(child.sleep.remote())
else:
ray.get(sleep.options(resources={"child": 1}).remote())
def sleep(self):
time.sleep(1000)
def get_pid(self):
return os.getpid()
# Returns whether the "child" resource is available.
def child_resource_available():
p = probe.remote()
ready, _ = ray.wait([p], timeout=1)
return len(ready) > 0
# Test fate sharing if the parent process dies.
def test_process_failure(use_actors):
a = Actor.options(resources={"parent": 1}).remote()
pid = ray.get(a.get_pid.remote())
a.start_child.remote(use_actors=use_actors)
# Wait for the child to be scheduled.
assert wait_for_condition(
lambda: not child_resource_available(), timeout_ms=10000)
# Kill the parent process.
os.kill(pid, 9)
assert wait_for_condition(child_resource_available, timeout_ms=10000)
# Test fate sharing if the parent node dies.
def test_node_failure(node_to_kill, use_actors):
a = Actor.options(resources={"parent": 1}).remote()
a.start_child.remote(use_actors=use_actors)
# Wait for the child to be scheduled.
assert wait_for_condition(
lambda: not child_resource_available(), timeout_ms=10000)
# Kill the parent process.
cluster.remove_node(node_to_kill, allow_graceful=False)
node_to_kill = cluster.add_node(num_cpus=1, resources={"parent": 1})
assert wait_for_condition(child_resource_available, timeout_ms=10000)
return node_to_kill
test_process_failure(use_actors=True)
test_process_failure(use_actors=False)
node_to_kill = test_node_failure(node_to_kill, use_actors=True)
node_to_kill = test_node_failure(node_to_kill, use_actors=False)
def test_fate_sharing(ray_start_cluster, use_actors, node_failure):
config = {
"num_heartbeats_timeout": 10,
"raylet_heartbeat_period_milliseconds": 100,
}
cluster = Cluster()
# Head node with no resources.
cluster.add_node(num_cpus=0, _system_config=config)
ray.init(address=cluster.address)
# Node to place the parent actor.
node_to_kill = cluster.add_node(num_cpus=1, resources={"parent": 1})
# Node to place the child actor.
cluster.add_node(num_cpus=1, resources={"child": 1})
cluster.wait_for_nodes()
@ray.remote
def sleep():
time.sleep(1000)
@ray.remote(resources={"child": 1})
def probe():
return
# TODO(swang): This test does not pass if max_restarts > 0 for the
# raylet codepath. Add this parameter once the GCS actor service is enabled
# by default.
@ray.remote
class Actor(object):
def __init__(self):
return
def start_child(self, use_actors):
if use_actors:
child = Actor.options(resources={"child": 1}).remote()
ray.get(child.sleep.remote())
else:
ray.get(sleep.options(resources={"child": 1}).remote())
def sleep(self):
time.sleep(1000)
def get_pid(self):
return os.getpid()
# Returns whether the "child" resource is available.
def child_resource_available():
p = probe.remote()
ready, _ = ray.wait([p], timeout=1)
return len(ready) > 0
# Test fate sharing if the parent process dies.
def test_process_failure(use_actors):
a = Actor.options(resources={"parent": 1}).remote()
pid = ray.get(a.get_pid.remote())
a.start_child.remote(use_actors=use_actors)
# Wait for the child to be scheduled.
wait_for_condition(lambda: not child_resource_available())
# Kill the parent process.
os.kill(pid, 9)
wait_for_condition(child_resource_available)
# Test fate sharing if the parent node dies.
def test_node_failure(node_to_kill, use_actors):
a = Actor.options(resources={"parent": 1}).remote()
a.start_child.remote(use_actors=use_actors)
# Wait for the child to be scheduled.
wait_for_condition(lambda: not child_resource_available())
# Kill the parent process.
cluster.remove_node(node_to_kill, allow_graceful=False)
node_to_kill = cluster.add_node(num_cpus=1, resources={"parent": 1})
wait_for_condition(child_resource_available)
return node_to_kill
if node_failure:
test_node_failure(node_to_kill, use_actors)
else:
test_process_failure(use_actors)
def test_reconstruction_cached_dependency(ray_start_cluster,
reconstruction_enabled):
config = json.dumps({
"num_heartbeats_timeout":
10,
"raylet_heartbeat_timeout_milliseconds":
100,
"lineage_pinning_enabled":
1 if reconstruction_enabled else 0,
"free_objects_period_milliseconds":
-1,
})
cluster = Cluster()
# Head node with no resources.
cluster.add_node(num_cpus=0, _internal_config=config)
ray.init(address=cluster.address)
# Node to place the initial object.
node_to_kill = cluster.add_node(num_cpus=1,
resources={"node1": 1},
object_store_memory=10**8,
_internal_config=config)
cluster.add_node(num_cpus=1,
resources={"node2": 1},
object_store_memory=10**8,
_internal_config=config)
cluster.wait_for_nodes()
@ray.remote(max_retries=0)
def large_object():
return np.zeros(10**7, dtype=np.uint8)
@ray.remote
def chain(x):
return x
@ray.remote
def dependent_task(x):
return
obj = large_object.options(resources={"node2": 1}).remote()
obj = chain.options(resources={"node1": 1}).remote(obj)
ray.get(dependent_task.options(resources={"node1": 1}).remote(obj))
cluster.remove_node(node_to_kill, allow_graceful=False)
cluster.add_node(num_cpus=1,
resources={"node1": 1},
object_store_memory=10**8,
_internal_config=config)
assert wait_for_condition(lambda: not all(node["Alive"]
for node in ray.nodes()),
timeout=10)
for _ in range(20):
large_object.options(resources={"node2": 1}).remote()
if reconstruction_enabled:
ray.get(dependent_task.remote(obj))
else:
with pytest.raises(ray.exceptions.RayTaskError) as e:
ray.get(dependent_task.remote(obj))
with pytest.raises(ray.exceptions.UnreconstructableError):
raise e.as_instanceof_cause()