def setUpClass(cls):
if DSE_VERSION is None and SIMULACRON_JAR is None or CASSANDRA_VERSION < Version(
"2.1"):
return
cls.simulacron_cluster = start_and_prime_cluster_defaults(
dse_version=DSE_VERSION, nodes_per_dc=cls.nodes_per_dc)
if cls.connect:
cls.cluster = Cluster(protocol_version=PROTOCOL_VERSION,
compression=False)
cls.session = cls.cluster.connect(wait_for_all_pools=True)
def test_heart_beat_timeout(self):
"""
Test to ensure the hosts are marked as down after a OTO is received.
Also to ensure this happens within the expected timeout
@since 3.10
@jira_ticket PYTHON-762
@expected_result all the hosts have been marked as down at some point
@test_category metadata
"""
number_of_dcs = 3
nodes_per_dc = 20
query_to_prime = "INSERT INTO test3rf.test (k, v) VALUES (0, 1);"
idle_heartbeat_timeout = 5
idle_heartbeat_interval = 1
start_and_prime_cluster_defaults(number_of_dcs, nodes_per_dc)
listener = TrackDownListener()
executor = ThreadTracker(max_workers=8)
# We need to disable compression since it's not supported in simulacron
cluster = Cluster(
compression=False,
idle_heartbeat_interval=idle_heartbeat_interval,
idle_heartbeat_timeout=idle_heartbeat_timeout,
executor_threads=8,
execution_profiles={
EXEC_PROFILE_DEFAULT:
ExecutionProfile(load_balancing_policy=RoundRobinPolicy())
})
self.addCleanup(cluster.shutdown)
cluster.scheduler.shutdown()
cluster.executor = executor
cluster.scheduler = _Scheduler(executor)
session = cluster.connect(wait_for_all_pools=True)
cluster.register_listener(listener)
log = logging.getLogger()
log.setLevel('CRITICAL')
self.addCleanup(log.setLevel, "DEBUG")
prime_query(query_to_prime, then=NO_THEN)
futures = []
for _ in range(number_of_dcs * nodes_per_dc):
future = session.execute_async(query_to_prime)
futures.append(future)
for f in futures:
f._event.wait()
self.assertIsInstance(f._final_exception, OperationTimedOut)
prime_request(PrimeOptions(then=NO_THEN))
# We allow from some extra time for all the hosts to be to on_down
# The callbacks should start happening after idle_heartbeat_timeout + idle_heartbeat_interval
time.sleep((idle_heartbeat_timeout + idle_heartbeat_interval) * 2.5)
for host in cluster.metadata.all_hosts():
self.assertIn(host, listener.hosts_marked_down)
# In this case HostConnection._replace shouldn't be called
self.assertNotIn("_replace", executor.called_functions)
def test_retry_after_defunct(self):
"""
We test cluster._retry is called if an the connection is defunct
in the middle of a query
Finally we verify the driver recovers correctly in the event
of a network partition
@since 3.12
@expected_result the driver is able to query even if a host is marked
as down in the middle of the query, it will go to the next one if the timeout
hasn't expired
@test_category connection
"""
number_of_dcs = 3
nodes_per_dc = 2
query_to_prime = "INSERT INTO test3rf.test (k, v) VALUES (0, 1);"
idle_heartbeat_timeout = 1
idle_heartbeat_interval = 5
simulacron_cluster = start_and_prime_cluster_defaults(
number_of_dcs, nodes_per_dc)
dc_ids = sorted(simulacron_cluster.data_center_ids)
last_host = dc_ids.pop()
prime_query(query_to_prime,
cluster_name="{}/{}".format(
simulacron_cluster.cluster_name, last_host))
roundrobin_lbp = OrderedRoundRobinPolicy()
cluster = Cluster(
compression=False,
idle_heartbeat_interval=idle_heartbeat_interval,
idle_heartbeat_timeout=idle_heartbeat_timeout,
execution_profiles={
EXEC_PROFILE_DEFAULT:
ExecutionProfile(load_balancing_policy=roundrobin_lbp)
})
session = cluster.connect(wait_for_all_pools=True)
self.addCleanup(cluster.shutdown)
# This simulates we only have access to one DC
for dc_id in dc_ids:
datacenter_path = "{}/{}".format(simulacron_cluster.cluster_name,
dc_id)
prime_query(query_to_prime,
then=NO_THEN,
cluster_name=datacenter_path)
prime_request(
PrimeOptions(then=NO_THEN, cluster_name=datacenter_path))
# Only the last datacenter will respond, therefore the first host won't
# We want to make sure the returned hosts are 127.0.0.1, 127.0.0.2, ... 127.0.0.8
roundrobin_lbp._position = 0
# After 3 + 1 seconds the connection should be marked and down and another host retried
response_future = session.execute_async(
query_to_prime,
timeout=4 * idle_heartbeat_interval + idle_heartbeat_timeout)
response_future.result()
self.assertGreater(len(response_future.attempted_hosts), 1)
# No error should be raised here since the hosts have been marked
# as down and there's still 1 DC available
for _ in range(10):
session.execute(query_to_prime)
# Might take some time to close the previous connections and reconnect
time.sleep(10)
assert_quiescent_pool_state(self, cluster)
clear_queries()
time.sleep(10)
assert_quiescent_pool_state(self, cluster)
def test_heart_beat_timeout(self):
"""
Test to ensure the hosts are marked as down after a OTO is received.
Also to ensure this happens within the expected timeout
@since 3.10
@jira_ticket PYTHON-762
@expected_result all the hosts have been marked as down at some point
@test_category metadata
"""
number_of_dcs = 3
nodes_per_dc = 20
query_to_prime = "INSERT INTO test3rf.test (k, v) VALUES (0, 1);"
idle_heartbeat_timeout = 5
idle_heartbeat_interval = 1
start_and_prime_cluster_defaults(number_of_dcs, nodes_per_dc)
listener = TrackDownListener()
executor = ThreadTracker(max_workers=8)
# We need to disable compression since it's not supported in simulacron
cluster = Cluster(compression=False,
idle_heartbeat_interval=idle_heartbeat_interval,
idle_heartbeat_timeout=idle_heartbeat_timeout,
executor_threads=8,
execution_profiles={
EXEC_PROFILE_DEFAULT: ExecutionProfile(load_balancing_policy=RoundRobinPolicy())})
self.addCleanup(cluster.shutdown)
cluster.scheduler.shutdown()
cluster.executor = executor
cluster.scheduler = _Scheduler(executor)
session = cluster.connect(wait_for_all_pools=True)
cluster.register_listener(listener)
log = logging.getLogger()
log.setLevel('CRITICAL')
self.addCleanup(log.setLevel, "DEBUG")
prime_query(query_to_prime, then=NO_THEN)
futures = []
for _ in range(number_of_dcs * nodes_per_dc):
future = session.execute_async(query_to_prime)
futures.append(future)
for f in futures:
f._event.wait()
self.assertIsInstance(f._final_exception, OperationTimedOut)
prime_request(PrimeOptions(then=NO_THEN))
# We allow from some extra time for all the hosts to be to on_down
# The callbacks should start happening after idle_heartbeat_timeout + idle_heartbeat_interval
time.sleep((idle_heartbeat_timeout + idle_heartbeat_interval) * 2.5)
for host in cluster.metadata.all_hosts():
self.assertIn(host, listener.hosts_marked_down)
# In this case HostConnection._replace shouldn't be called
self.assertNotIn("_replace", executor.called_functions)
def test_retry_after_defunct(self):
"""
We test cluster._retry is called if an the connection is defunct
in the middle of a query
Finally we verify the driver recovers correctly in the event
of a network partition
@since 3.12
@expected_result the driver is able to query even if a host is marked
as down in the middle of the query, it will go to the next one if the timeout
hasn't expired
@test_category connection
"""
number_of_dcs = 3
nodes_per_dc = 2
query_to_prime = "INSERT INTO test3rf.test (k, v) VALUES (0, 1);"
idle_heartbeat_timeout = 1
idle_heartbeat_interval = 5
simulacron_cluster = start_and_prime_cluster_defaults(number_of_dcs, nodes_per_dc)
dc_ids = sorted(simulacron_cluster.data_center_ids)
last_host = dc_ids.pop()
prime_query(query_to_prime,
cluster_name="{}/{}".format(simulacron_cluster.cluster_name, last_host))
roundrobin_lbp = OrderedRoundRobinPolicy()
cluster = Cluster(compression=False,
idle_heartbeat_interval=idle_heartbeat_interval,
idle_heartbeat_timeout=idle_heartbeat_timeout,
execution_profiles={
EXEC_PROFILE_DEFAULT: ExecutionProfile(load_balancing_policy=roundrobin_lbp)})
session = cluster.connect(wait_for_all_pools=True)
self.addCleanup(cluster.shutdown)
# This simulates we only have access to one DC
for dc_id in dc_ids:
datacenter_path = "{}/{}".format(simulacron_cluster.cluster_name, dc_id)
prime_query(query_to_prime, then=NO_THEN, cluster_name=datacenter_path)
prime_request(PrimeOptions(then=NO_THEN, cluster_name=datacenter_path))
# Only the last datacenter will respond, therefore the first host won't
# We want to make sure the returned hosts are 127.0.0.1, 127.0.0.2, ... 127.0.0.8
roundrobin_lbp._position = 0
# After 3 + 1 seconds the connection should be marked and down and another host retried
response_future = session.execute_async(query_to_prime, timeout=4 * idle_heartbeat_interval
+ idle_heartbeat_timeout)
response_future.result()
self.assertGreater(len(response_future.attempted_hosts), 1)
# No error should be raised here since the hosts have been marked
# as down and there's still 1 DC available
for _ in range(10):
session.execute(query_to_prime)
# Might take some time to close the previous connections and reconnect
time.sleep(10)
assert_quiescent_pool_state(self, cluster)
clear_queries()
time.sleep(10)
assert_quiescent_pool_state(self, cluster)
