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consistency_test.py
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consistency_test.py
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import queue
import sys
import threading
import time
import pytest
import logging
from collections import OrderedDict, namedtuple
from copy import deepcopy
from cassandra import ConsistencyLevel, consistency_value_to_name
from cassandra.query import BatchStatement, BatchType, SimpleStatement
from tools.jmxutils import JolokiaAgent, make_mbean
from tools.assertions import (assert_all, assert_length_equal, assert_none,
assert_unavailable)
from dtest import MultiError, Tester, create_ks, create_cf
from tools.data import (create_c1c2_table, insert_c1c2, insert_columns,
query_c1c2, rows_to_list)
since = pytest.mark.since
ported_to_in_jvm = pytest.mark.ported_to_in_jvm
logger = logging.getLogger(__name__)
ExpectedConsistency = namedtuple('ExpectedConsistency', ('num_write_nodes', 'num_read_nodes', 'is_strong'))
class TestHelper(Tester):
def _is_local(self, cl):
return (cl == ConsistencyLevel.LOCAL_QUORUM or
cl == ConsistencyLevel.LOCAL_ONE or
cl == ConsistencyLevel.LOCAL_SERIAL)
def _is_conditional(self, cl):
return (cl == ConsistencyLevel.SERIAL or
cl == ConsistencyLevel.LOCAL_SERIAL)
def _required_nodes(self, cl, rf_factors, dc):
"""
Return the number of nodes required by this consistency level
in the current data center, specified by the dc parameter,
given a list of replication factors, one per dc.
"""
return {
ConsistencyLevel.ANY: 1,
ConsistencyLevel.ONE: 1,
ConsistencyLevel.TWO: 2,
ConsistencyLevel.THREE: 3,
ConsistencyLevel.QUORUM: sum(rf_factors) // 2 + 1,
ConsistencyLevel.ALL: sum(rf_factors),
ConsistencyLevel.LOCAL_QUORUM: rf_factors[dc] // 2 + 1,
ConsistencyLevel.EACH_QUORUM: rf_factors[dc] // 2 + 1,
ConsistencyLevel.SERIAL: sum(rf_factors) // 2 + 1,
ConsistencyLevel.LOCAL_SERIAL: rf_factors[dc] // 2 + 1,
ConsistencyLevel.LOCAL_ONE: 1,
}[cl]
def get_expected_consistency(self, idx, rf_factors, write_cl, read_cl):
"""
Given a node index, identify to which data center we are connecting and return
the expected consistency: number of nodes we write to, read from, and whether
we should have strong consistency, that is whether R + W > N
"""
nodes = [self.nodes] if isinstance(self.nodes, int) else self.nodes
def get_data_center():
"""
:return: the data center corresponding to this node
"""
dc = 0
for i in range(1, len(nodes)):
if idx < sum(nodes[:i]):
break
dc += 1
return dc
data_center = get_data_center()
if write_cl == ConsistencyLevel.EACH_QUORUM:
write_nodes = sum([self._required_nodes(write_cl, rf_factors, i) for i in range(0, len(nodes))])
else:
write_nodes = self._required_nodes(write_cl, rf_factors, data_center)
read_nodes = self._required_nodes(read_cl, rf_factors, data_center)
is_strong = read_nodes + write_nodes > sum(rf_factors)
return ExpectedConsistency(num_write_nodes=write_nodes,
num_read_nodes=read_nodes,
is_strong=is_strong)
def _should_succeed(self, cl, rf_factors, num_nodes_alive, current):
"""
Return true if the read or write operation should succeed based on
the consistency level requested, the replication factors and the
number of nodes alive in each data center.
"""
if self._is_local(cl):
return num_nodes_alive[current] >= self._required_nodes(cl, rf_factors, current)
elif cl == ConsistencyLevel.EACH_QUORUM:
for i in range(0, len(rf_factors)):
if num_nodes_alive[i] < self._required_nodes(cl, rf_factors, i):
return False
return True
else:
return sum(num_nodes_alive) >= self._required_nodes(cl, rf_factors, current)
def _start_cluster(self, save_sessions=False, requires_local_reads=False):
cluster = self.cluster
nodes = self.nodes
rf = self.rf
configuration_options = {'hinted_handoff_enabled': False}
# If we must read from the local replica first, then the dynamic snitch poses a problem
# because occasionally it may think that another replica is preferable even if the
# coordinator is a replica
if requires_local_reads:
configuration_options['dynamic_snitch'] = False
cluster.set_configuration_options(values=configuration_options)
cluster.populate(nodes)
if requires_local_reads and isinstance(nodes, int):
# Changing the snitch to PropertyFileSnitch even in the
# single dc tests ensures that StorageProxy sorts the replicas eligible
# for reading by proximity to the local host, essentially picking the
# local host for local reads, see IEndpointSnitch.sortByProximity() and
# StorageProxy.getLiveSortedEndpoints(), which is called by the AbstractReadExecutor
# to determine the target replicas. The default case, a SimpleSnitch wrapped in
# a dynamic snitch, may rarely choose a different replica.
logger.debug('Changing snitch for single dc case')
for node in cluster.nodelist():
node.data_center = 'dc1'
cluster.set_configuration_options(values={
'endpoint_snitch': 'org.apache.cassandra.locator.PropertyFileSnitch'})
cluster.start()
self.ksname = 'mytestks'
session = self.patient_exclusive_cql_connection(cluster.nodelist()[0])
create_ks(session, self.ksname, rf)
self.create_tables(session, requires_local_reads)
if save_sessions:
self.sessions = []
self.sessions.append(session)
for node in cluster.nodelist()[1:]:
self.sessions.append(self.patient_exclusive_cql_connection(node, self.ksname))
def create_tables(self, session, requires_local_reads):
self.create_users_table(session, requires_local_reads)
self.create_counters_table(session, requires_local_reads)
session.cluster.control_connection.wait_for_schema_agreement(wait_time=60)
def truncate_tables(self, session):
statement = SimpleStatement("TRUNCATE users", ConsistencyLevel.ALL)
session.execute(statement)
statement = SimpleStatement("TRUNCATE counters", ConsistencyLevel.ALL)
session.execute(statement)
def create_users_table(self, session, requires_local_reads):
create_cmd = """
CREATE TABLE users (
userid int PRIMARY KEY,
firstname text,
lastname text,
age int
)"""
if requires_local_reads:
create_cmd += " WITH " + self.get_local_reads_properties(self.cluster.version())
session.execute(create_cmd)
@staticmethod
def get_local_reads_properties(cluster_version):
"""
If we must read from the local replica first, then we should disable read repair and
speculative retry, see CASSANDRA-12092
"""
if cluster_version < '4.0':
return " dclocal_read_repair_chance = 0 AND read_repair_chance = 0 AND speculative_retry = 'NONE'"
else:
return " speculative_retry = 'NONE'"
def insert_user(self, session, userid, age, consistency, serial_consistency=None):
text = "INSERT INTO users (userid, firstname, lastname, age) VALUES ({}, 'first{}', 'last{}', {}) {}"\
.format(userid, userid, userid, age, "IF NOT EXISTS" if serial_consistency else "")
statement = SimpleStatement(text, consistency_level=consistency, serial_consistency_level=serial_consistency)
session.execute(statement)
def update_user(self, session, userid, age, consistency, serial_consistency=None, prev_age=None):
text = "UPDATE users SET age = {} WHERE userid = {}".format(age, userid)
if serial_consistency and prev_age:
text = text + " IF age = {}".format(prev_age)
statement = SimpleStatement(text, consistency_level=consistency, serial_consistency_level=serial_consistency)
session.execute(statement)
def delete_user(self, session, userid, consistency):
statement = SimpleStatement("DELETE FROM users where userid = {}".format(userid), consistency_level=consistency)
session.execute(statement)
def query_user(self, session, userid, age, consistency, check_ret=True):
statement = SimpleStatement("SELECT userid, age FROM users where userid = {}".format(userid), consistency_level=consistency)
res = session.execute(statement)
expected = [[userid, age]] if age else []
ret = rows_to_list(res) == expected
if check_ret:
assert ret, "Got {} from {}, expected {} at {}".format(rows_to_list(res), session.cluster.contact_points, expected, consistency_value_to_name(consistency))
return ret
def create_counters_table(self, session, requires_local_reads):
create_cmd = """
CREATE TABLE counters (
id int PRIMARY KEY,
c counter
)"""
if requires_local_reads:
create_cmd += " WITH " + self.get_local_reads_properties(self.cluster.version())
session.execute(create_cmd)
def update_counter(self, session, id, consistency, serial_consistency=None):
text = "UPDATE counters SET c = c + 1 WHERE id = {}".format(id)
statement = SimpleStatement(text, consistency_level=consistency, serial_consistency_level=serial_consistency)
session.execute(statement)
return statement
def query_counter(self, session, id, val, consistency, check_ret=True):
statement = SimpleStatement("SELECT * from counters WHERE id = {}".format(id), consistency_level=consistency)
ret = rows_to_list(session.execute(statement))
if check_ret:
assert ret[0][1] == val, "Got {} from {}, expected {} at {}".format(ret[0][1],
session.cluster.contact_points,
val,
consistency_value_to_name(consistency))
return ret[0][1] if ret else 0
class TestAvailability(TestHelper):
"""
Test that we can read and write depending on the number of nodes that are alive and the consistency levels.
"""
def _test_simple_strategy(self, combinations):
"""
Helper test function for a single data center: invoke _test_insert_query_from_node() for each node
and each combination, progressively stopping nodes.
"""
cluster = self.cluster
nodes = self.nodes
rf = self.rf
num_alive = nodes
for node in range(nodes):
logger.debug('Testing node {} in single dc with {} nodes alive'.format(node, num_alive))
session = self.patient_exclusive_cql_connection(cluster.nodelist()[node], self.ksname)
for combination in combinations:
self._test_insert_query_from_node(session, 0, [rf], [num_alive], *combination)
self.cluster.nodelist()[node].stop()
num_alive -= 1
def _test_network_topology_strategy(self, combinations):
"""
Helper test function for multiple data centers, invoke _test_insert_query_from_node() for each node
in each dc and each combination, progressively stopping nodes.
"""
cluster = self.cluster
nodes = self.nodes
rf = self.rf
nodes_alive = deepcopy(nodes)
rf_factors = list(rf.values())
for i in range(0, len(nodes)): # for each dc
logger.debug('Testing dc {} with rf {} and {} nodes alive'.format(i, rf_factors[i], nodes_alive))
for n in range(nodes[i]): # for each node in this dc
logger.debug('Testing node {} in dc {} with {} nodes alive'.format(n, i, nodes_alive))
node = n + sum(nodes[:i])
session = self.patient_exclusive_cql_connection(cluster.nodelist()[node], self.ksname)
for combination in combinations:
self._test_insert_query_from_node(session, i, rf_factors, nodes_alive, *combination)
self.cluster.nodelist()[node].stop(wait_other_notice=True)
nodes_alive[i] -= 1
def _test_insert_query_from_node(self, session, dc_idx, rf_factors, num_nodes_alive, write_cl, read_cl, serial_cl=None, check_ret=True):
"""
Test availability for read and write via the session passed in as a parameter.
"""
logger.debug("Connected to %s for %s/%s/%s" %
(session.cluster.contact_points, consistency_value_to_name(write_cl), consistency_value_to_name(read_cl), consistency_value_to_name(serial_cl)))
start = 0
end = 100
age = 30
if self._should_succeed(write_cl, rf_factors, num_nodes_alive, dc_idx):
for n in range(start, end):
self.insert_user(session, n, age, write_cl, serial_cl)
else:
assert_unavailable(self.insert_user, session, end, age, write_cl, serial_cl)
if self._should_succeed(read_cl, rf_factors, num_nodes_alive, dc_idx):
for n in range(start, end):
self.query_user(session, n, age, read_cl, check_ret)
else:
assert_unavailable(self.query_user, session, end, age, read_cl, check_ret)
def test_simple_strategy(self):
"""
Test for a single datacenter, using simple replication strategy.
"""
self.nodes = 3
self.rf = 3
self._start_cluster()
combinations = [
(ConsistencyLevel.ALL, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.QUORUM),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.ONE, ConsistencyLevel.ONE, None, False),
(ConsistencyLevel.ONE, ConsistencyLevel.ALL),
(ConsistencyLevel.ALL, ConsistencyLevel.ONE),
(ConsistencyLevel.QUORUM, ConsistencyLevel.TWO),
(ConsistencyLevel.QUORUM, ConsistencyLevel.THREE),
(ConsistencyLevel.TWO, ConsistencyLevel.TWO),
(ConsistencyLevel.THREE, ConsistencyLevel.ONE),
(ConsistencyLevel.ANY, ConsistencyLevel.ONE, None, False),
(ConsistencyLevel.LOCAL_ONE, ConsistencyLevel.LOCAL_ONE, None, False),
(ConsistencyLevel.QUORUM, ConsistencyLevel.SERIAL, ConsistencyLevel.SERIAL),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_SERIAL, ConsistencyLevel.LOCAL_SERIAL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.LOCAL_SERIAL, ConsistencyLevel.SERIAL),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.SERIAL, ConsistencyLevel.LOCAL_SERIAL),
]
self._test_simple_strategy(combinations)
@since("3.0")
def test_simple_strategy_each_quorum(self):
"""
@jira_ticket CASSANDRA-10584
Test for a single datacenter, using simple replication strategy, only
the each quorum reads.
"""
self.nodes = 3
self.rf = 3
self._start_cluster()
combinations = [
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.EACH_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.EACH_QUORUM),
]
self._test_simple_strategy(combinations)
@pytest.mark.resource_intensive
def test_network_topology_strategy(self):
"""
Test for multiple datacenters, using network topology replication strategy.
"""
self.nodes = [3, 3, 3]
self.rf = OrderedDict([('dc1', 3), ('dc2', 3), ('dc3', 3)])
self._start_cluster()
combinations = [
(ConsistencyLevel.ALL, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.QUORUM),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.ONE, ConsistencyLevel.ONE, None, False),
(ConsistencyLevel.ONE, ConsistencyLevel.ALL),
(ConsistencyLevel.ALL, ConsistencyLevel.ONE),
(ConsistencyLevel.QUORUM, ConsistencyLevel.TWO),
(ConsistencyLevel.QUORUM, ConsistencyLevel.THREE),
(ConsistencyLevel.TWO, ConsistencyLevel.TWO),
(ConsistencyLevel.THREE, ConsistencyLevel.ONE),
(ConsistencyLevel.ANY, ConsistencyLevel.ONE, None, False),
(ConsistencyLevel.LOCAL_ONE, ConsistencyLevel.LOCAL_ONE, None, False),
(ConsistencyLevel.QUORUM, ConsistencyLevel.SERIAL, ConsistencyLevel.SERIAL),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_SERIAL, ConsistencyLevel.LOCAL_SERIAL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.LOCAL_SERIAL, ConsistencyLevel.SERIAL),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.SERIAL, ConsistencyLevel.LOCAL_SERIAL),
]
self._test_network_topology_strategy(combinations)
@pytest.mark.resource_intensive
@since("3.0")
def test_network_topology_strategy_each_quorum(self):
"""
@jira_ticket CASSANDRA-10584
Test for multiple datacenters, using network topology strategy, only
the each quorum reads.
"""
self.nodes = [3, 3, 3]
self.rf = OrderedDict([('dc1', 3), ('dc2', 3), ('dc3', 3)])
self._start_cluster()
combinations = [
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.EACH_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.EACH_QUORUM),
]
self._test_network_topology_strategy(combinations)
class TestAccuracy(TestHelper):
"""
Test that we can consistently read back what we wrote depending on the write and read consistency levels.
"""
class Validation:
def __init__(self, outer, sessions, nodes, rf_factors, start, end, write_cl, read_cl, serial_cl=None):
self.outer = outer
self.sessions = sessions
self.nodes = nodes
self.rf_factors = rf_factors
self.start = start
self.end = end
self.write_cl = write_cl
self.read_cl = read_cl
self.serial_cl = serial_cl
logger.debug('Testing accuracy with WRITE/READ/SERIAL consistency set to {}/{}/{} (keys : {} to {})'
.format(consistency_value_to_name(write_cl), consistency_value_to_name(read_cl), consistency_value_to_name(serial_cl), start, end - 1))
def get_expected_consistency(self, idx):
return self.outer.get_expected_consistency(idx, self.rf_factors, self.write_cl, self.read_cl)
def validate_users(self):
"""
First validation function: update the users table sending different values to different sessions
and check that when strong_consistency is true (R + W > N) we read back the latest value from all sessions.
If strong_consistency is false we instead check that we read back the latest value from at least
the number of nodes we wrote to.
"""
outer = self.outer
sessions = self.sessions
start = self.start
end = self.end
write_cl = self.write_cl
read_cl = self.read_cl
serial_cl = self.serial_cl
def check_all_sessions(idx, n, val):
expected_consistency = self.get_expected_consistency(idx)
num = 0
for s in sessions:
if outer.query_user(s, n, val, read_cl, check_ret=expected_consistency.is_strong):
num += 1
assert num >= expected_consistency.num_write_nodes, "Failed to read value from sufficient number of nodes," + \
" required {} but got {} - [{}, {}]".format(expected_consistency.num_write_nodes, num, n, val)
for n in range(start, end):
age = 30
for s in range(0, len(sessions)):
outer.insert_user(sessions[s], n, age, write_cl, serial_cl)
check_all_sessions(s, n, age)
if serial_cl is None:
age += 1
for s in range(0, len(sessions)):
outer.update_user(sessions[s], n, age, write_cl, serial_cl, age - 1)
check_all_sessions(s, n, age)
age += 1
outer.delete_user(sessions[0], n, write_cl)
check_all_sessions(s, n, None)
def validate_counters(self):
"""
Second validation function: update the counters table sending different values to different sessions
and check that when strong_consistency is true (R + W > N) we read back the latest value from all sessions.
If strong_consistency is false we instead check that we read back the latest value from at least
the number of nodes we wrote to.
"""
outer = self.outer
sessions = self.sessions
start = self.start
end = self.end
write_cl = self.write_cl
read_cl = self.read_cl
serial_cl = self.serial_cl
def check_all_sessions(idx, n, val):
expected_consistency = self.get_expected_consistency(idx)
results = []
for s in sessions:
results.append(outer.query_counter(s, n, val, read_cl, check_ret=expected_consistency.is_strong))
assert results.count(val) >= expected_consistency.num_write_nodes, "Failed to read value from sufficient number of nodes, required {} nodes to have a" + \
" counter value of {} at key {}, instead got these values: {}".format(expected_consistency.num_write_nodes, val, n, results)
for n in range(start, end):
c = 1
for s in range(0, len(sessions)):
outer.update_counter(sessions[s], n, write_cl, serial_cl)
check_all_sessions(s, n, c)
# Update the counter again at CL ALL to make sure all nodes are on the same page
# since a counter update requires a read
outer.update_counter(sessions[s], n, ConsistencyLevel.ALL)
c += 2 # the counter was updated twice
def _run_test_function_in_parallel(self, valid_fcn, nodes, rf_factors, combinations):
"""
Run a test function in parallel.
"""
requires_local_reads = False
for combination in combinations:
for i, _ in enumerate(nodes):
expected_consistency = self.get_expected_consistency(i, rf_factors, combination[0], combination[1])
if not expected_consistency.is_strong:
# if at least one combination does not reach strong consistency, in order to validate weak
# consistency we require local reads, see CASSANDRA-12092 for details.
requires_local_reads = True
break
if requires_local_reads:
break
self._start_cluster(save_sessions=True, requires_local_reads=requires_local_reads)
input_queue = queue.Queue()
exceptions_queue = queue.Queue()
def run():
while not input_queue.empty():
try:
v = TestAccuracy.Validation(self, self.sessions, nodes, rf_factors, *input_queue.get(block=False))
valid_fcn(v)
except queue.Empty:
pass
except Exception:
exceptions_queue.put(sys.exc_info())
start = 0
num_keys = 50
for combination in combinations:
input_queue.put((start, start + num_keys) + combination)
start += num_keys
threads = []
for n in range(0, 8):
t = threading.Thread(target=run)
t.setDaemon(True)
t.start()
threads.append(t)
logger.debug("Waiting for workers to complete")
while exceptions_queue.empty():
time.sleep(0.1)
if len([t for t in threads if t.is_alive()]) == 0:
break
if not exceptions_queue.empty():
_, exceptions, tracebacks = list(zip(*exceptions_queue.queue))
raise MultiError(exceptions=exceptions, tracebacks=tracebacks)
@pytest.mark.resource_intensive
def test_simple_strategy_users(self):
"""
Test for a single datacenter, users table, only the each quorum reads.
"""
self.nodes = 5
self.rf = 3
combinations = [
(ConsistencyLevel.ALL, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.QUORUM),
(ConsistencyLevel.ALL, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.QUORUM),
(ConsistencyLevel.TWO, ConsistencyLevel.TWO),
(ConsistencyLevel.ONE, ConsistencyLevel.THREE),
(ConsistencyLevel.THREE, ConsistencyLevel.ONE),
(ConsistencyLevel.ANY, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.TWO),
(ConsistencyLevel.TWO, ConsistencyLevel.ONE),
# These are multi-DC consistency levels that should default to quorum calls
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.QUORUM, ConsistencyLevel.SERIAL, ConsistencyLevel.SERIAL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.LOCAL_SERIAL, ConsistencyLevel.SERIAL),
]
logger.debug("Testing single dc, users")
self._run_test_function_in_parallel(TestAccuracy.Validation.validate_users, [self.nodes], [self.rf], combinations)
@pytest.mark.resource_intensive
@since("3.0")
def test_simple_strategy_each_quorum_users(self):
"""
@jira_ticket CASSANDRA-10584
Test for a single datacenter, users table, only the each quorum reads.
"""
self.nodes = 5
self.rf = 3
combinations = [
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.EACH_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.EACH_QUORUM),
]
logger.debug("Testing single dc, users, each quorum reads")
self._run_test_function_in_parallel(TestAccuracy.Validation.validate_users, [self.nodes], [self.rf], combinations)
@pytest.mark.resource_intensive
def test_network_topology_strategy_users(self):
"""
Test for multiple datacenters, users table.
"""
self.nodes = [3, 3]
self.rf = OrderedDict([('dc1', 3), ('dc2', 3)])
combinations = [
(ConsistencyLevel.ALL, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.ALL, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.QUORUM),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.ONE),
(ConsistencyLevel.TWO, ConsistencyLevel.TWO),
(ConsistencyLevel.ONE, ConsistencyLevel.THREE),
(ConsistencyLevel.THREE, ConsistencyLevel.ONE),
(ConsistencyLevel.ANY, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.TWO),
(ConsistencyLevel.TWO, ConsistencyLevel.ONE),
(ConsistencyLevel.QUORUM, ConsistencyLevel.SERIAL, ConsistencyLevel.SERIAL),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_SERIAL, ConsistencyLevel.LOCAL_SERIAL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.LOCAL_SERIAL, ConsistencyLevel.SERIAL),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.SERIAL, ConsistencyLevel.LOCAL_SERIAL),
]
logger.debug("Testing multiple dcs, users")
self._run_test_function_in_parallel(TestAccuracy.Validation.validate_users, self.nodes, list(self.rf.values()), combinations),
@pytest.mark.resource_intensive
@since("3.0")
def test_network_topology_strategy_each_quorum_users(self):
"""
@jira_ticket CASSANDRA-10584
Test for a multiple datacenters, users table, only the each quorum
reads.
"""
self.nodes = [3, 3]
self.rf = OrderedDict([('dc1', 3), ('dc2', 3)])
combinations = [
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.EACH_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.EACH_QUORUM),
]
logger.debug("Testing multiple dcs, users, each quorum reads")
self._run_test_function_in_parallel(TestAccuracy.Validation.validate_users, self.nodes, list(self.rf.values()), combinations)
def test_simple_strategy_counters(self):
"""
Test for a single datacenter, counters table.
"""
self.nodes = 3
self.rf = 3
combinations = [
(ConsistencyLevel.ALL, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.QUORUM),
(ConsistencyLevel.ALL, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.QUORUM),
(ConsistencyLevel.TWO, ConsistencyLevel.TWO),
(ConsistencyLevel.ONE, ConsistencyLevel.THREE),
(ConsistencyLevel.THREE, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.TWO),
(ConsistencyLevel.TWO, ConsistencyLevel.ONE),
# These are multi-DC consistency levels that should default to quorum calls
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
]
logger.debug("Testing single dc, counters")
self._run_test_function_in_parallel(TestAccuracy.Validation.validate_counters, [self.nodes], [self.rf], combinations)
@since("3.0")
def test_simple_strategy_each_quorum_counters(self):
"""
@jira_ticket CASSANDRA-10584
Test for a single datacenter, counters table, only the each quorum
reads.
"""
self.nodes = 3
self.rf = 3
combinations = [
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.EACH_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.EACH_QUORUM),
]
logger.debug("Testing single dc, counters, each quorum reads")
self._run_test_function_in_parallel(TestAccuracy.Validation.validate_counters, [self.nodes], [self.rf], combinations)
@pytest.mark.resource_intensive
def test_network_topology_strategy_counters(self):
"""
Test for multiple datacenters, counters table.
"""
self.nodes = [3, 3]
self.rf = OrderedDict([('dc1', 3), ('dc2', 3)])
combinations = [
(ConsistencyLevel.ALL, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.ALL, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.ALL),
(ConsistencyLevel.QUORUM, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.QUORUM),
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.LOCAL_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.ONE),
(ConsistencyLevel.TWO, ConsistencyLevel.TWO),
(ConsistencyLevel.ONE, ConsistencyLevel.THREE),
(ConsistencyLevel.THREE, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.ONE),
(ConsistencyLevel.ONE, ConsistencyLevel.TWO),
(ConsistencyLevel.TWO, ConsistencyLevel.ONE),
]
logger.debug("Testing multiple dcs, counters")
self._run_test_function_in_parallel(TestAccuracy.Validation.validate_counters, self.nodes, list(self.rf.values()), combinations),
@pytest.mark.resource_intensive
@since("3.0")
def test_network_topology_strategy_each_quorum_counters(self):
"""
@jira_ticket CASSANDRA-10584
Test for multiple datacenters, counters table, only the each quorum
reads.
"""
self.nodes = [3, 3]
self.rf = OrderedDict([('dc1', 3), ('dc2', 3)])
combinations = [
(ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.EACH_QUORUM),
(ConsistencyLevel.EACH_QUORUM, ConsistencyLevel.EACH_QUORUM),
]
logger.debug("Testing multiple dcs, counters, each quorum reads")
self._run_test_function_in_parallel(TestAccuracy.Validation.validate_counters, self.nodes, list(self.rf.values()), combinations),
class TestConsistency(Tester):
@since('4.0')
def test_18766_sr(self):
"""
@jira_ticket CASSANDRA-18766
"""
cluster = self.cluster
self.cluster.populate(3).start()
node1 = cluster.nodelist()[0]
node1.stress(['write', 'n=100000', '-rate', 'threads=8', '-schema', 'replication(strategy=SimpleStrategy,replication_factor=2)'])
node1.stress(['read no-warmup duration=1m', '-rate', 'threads=8', '-errors', 'skip-read-validation'])
speculative_reads_mbean = make_mbean("metrics", type="Table", name="SpeculativeRetries", keyspace='keyspace1', scope='standard1')
coordinator_reads_mbean = make_mbean("metrics", type="Table", name="CoordinatorReadLatency", keyspace='keyspace1', scope='standard1')
for node in cluster.nodelist():
with JolokiaAgent(node) as jmx:
sr = jmx.read_attribute(speculative_reads_mbean, "Count")
cr = jmx.read_attribute(coordinator_reads_mbean, "Count")
pcent = sr / cr * 100
assert pcent < 10, "Speculative retry percentage %.2f%% too high on %s" % (pcent, node.address_and_port())
@since('3.0')
def test_14513_transient(self):
"""
@jira_ticket CASSANDRA-14513
A reproduction / regression test to illustrate CASSANDRA-14513:
transient data loss when doing reverse-order queries with range
tombstones in place.
This test shows how the bug can cause queries to return invalid
results by just a single node.
"""
cluster = self.cluster
# set column_index_size_in_kb to 1 for a slightly easier reproduction sequence
cluster.set_configuration_options(values={'column_index_size_in_kb': 1})
cluster.populate(1).start()
node1 = cluster.nodelist()[0]
session = self.patient_cql_connection(node1)
query = "CREATE KEYSPACE journals WITH replication = {'class': 'NetworkTopologyStrategy', 'datacenter1': 1};"
session.execute(query)
query = 'CREATE TABLE journals.logs (user text, year int, month int, day int, title text, body text, PRIMARY KEY ((user), year, month, day, title));';
session.execute(query)
# populate the table
stmt = session.prepare('INSERT INTO journals.logs (user, year, month, day, title, body) VALUES (?, ?, ?, ?, ?, ?);');
for year in range(2011, 2018):
for month in range(1, 13):
for day in range(1, 31):
session.execute(stmt, ['beobal', year, month, day, 'title', 'Lorem ipsum dolor sit amet'], ConsistencyLevel.ONE)
node1.flush()
# make sure the data is there
assert_all(session,
"SELECT COUNT(*) FROM journals.logs WHERE user = 'beobal' AND year < 2018 ORDER BY year DESC;",
[[7 * 12 * 30]],
cl=ConsistencyLevel.ONE)
# generate an sstable with an RT that opens in the penultimate block and closes in the last one
stmt = session.prepare('DELETE FROM journals.logs WHERE user = ? AND year = ? AND month = ? AND day = ?;')
batch = BatchStatement(batch_type=BatchType.UNLOGGED)
for day in range(1, 31):
batch.add(stmt, ['beobal', 2018, 1, day])
session.execute(batch)
node1.flush()
# the data should still be there for years 2011-2017, but prior to CASSANDRA-14513 it would've been gone
assert_all(session,
"SELECT COUNT(*) FROM journals.logs WHERE user = 'beobal' AND year < 2018 ORDER BY year DESC;",
[[7 * 12 * 30]],
cl=ConsistencyLevel.ONE)
@since('3.0')
def test_14513_permanent(self):
"""
@jira_ticket CASSANDRA-14513
A reproduction / regression test to illustrate CASSANDRA-14513:
permanent data loss when doing reverse-order queries with range
tombstones in place.
This test shows how the invalid RT can propagate to other replicas
and delete data permanently.
"""
cluster = self.cluster
# disable hinted handoff and set batch commit log so this doesn't interfere with the test
# set column_index_size_in_kb to 1 for a slightly easier reproduction sequence
cluster.set_configuration_options(values={'column_index_size_in_kb': 1, 'hinted_handoff_enabled': False})
cluster.set_batch_commitlog(enabled=True, use_batch_window = cluster.version() < '5.0')
cluster.populate(3).start()
node1, node2, node3 = cluster.nodelist()
session = self.patient_exclusive_cql_connection(node1)
query = "CREATE KEYSPACE journals WITH replication = {'class': 'NetworkTopologyStrategy', 'datacenter1': 3};"
session.execute(query)
query = 'CREATE TABLE journals.logs (user text, year int, month int, day int, title text, body text, PRIMARY KEY ((user), year, month, day, title));';
session.execute(query)
# populate the table
stmt = session.prepare('INSERT INTO journals.logs (user, year, month, day, title, body) VALUES (?, ?, ?, ?, ?, ?);');
for year in range(2011, 2018):
for month in range(1, 13):
for day in range(1, 31):
session.execute(stmt, ['beobal', year, month, day, 'title', 'Lorem ipsum dolor sit amet'], ConsistencyLevel.QUORUM)
cluster.flush()
# make sure the data is there
assert_all(session,
"SELECT COUNT(*) FROM journals.logs WHERE user = 'beobal' AND year < 2018 ORDER BY year DESC;",
[[7 * 12 * 30]],
cl=ConsistencyLevel.QUORUM)
# take one node down
node3.stop(wait_other_notice=True)
# generate an sstable with an RT that opens in the penultimate block and closes in the last one
stmt = session.prepare('DELETE FROM journals.logs WHERE user = ? AND year = ? AND month = ? AND day = ?;')
batch = BatchStatement(batch_type=BatchType.UNLOGGED)
for day in range(1, 31):
batch.add(stmt, ['beobal', 2018, 1, day])
session.execute(batch, [], ConsistencyLevel.QUORUM)
node1.flush()
node2.flush()
# take node2 down, get node3 up
node2.stop(wait_other_notice=True)
node3.start()
# insert an RT somewhere so that we would have a closing marker and RR makes its mutations
stmt = SimpleStatement("DELETE FROM journals.logs WHERE user = 'beobal' AND year = 2010 AND month = 12 AND day = 30",
consistency_level=ConsistencyLevel.QUORUM)
session.execute(stmt)
# this read will trigger read repair with the invalid RT and propagate the wide broken RT,
# permanently killing the partition
stmt = SimpleStatement("SELECT * FROM journals.logs WHERE user = 'beobal' AND year < 2018 ORDER BY year DESC;",
consistency_level=ConsistencyLevel.QUORUM)
session.execute(stmt)
# everything is gone
assert_all(session,
"SELECT COUNT(*) FROM journals.logs WHERE user = 'beobal';",
[[7 * 12 * 30]],
cl=ConsistencyLevel.QUORUM)
@since('3.0')
def test_14330(self):
"""
@jira_ticket CASSANDRA-14330
A regression test to prove that we no longer trigger
AssertionError during read repair in DataResolver
when encountering a repeat open RT bound from short
read protection responses.
"""
cluster = self.cluster
# disable hinted handoff and set batch commit log so this doesn't interfere with the test
cluster.set_configuration_options(values={'hinted_handoff_enabled': False})
cluster.set_batch_commitlog(enabled=True, use_batch_window = cluster.version() < '5.0')
cluster.populate(2).start()
node1, node2 = cluster.nodelist()
session = self.patient_cql_connection(node2)
query = "CREATE KEYSPACE test WITH replication = {'class': 'NetworkTopologyStrategy', 'datacenter1': 2};"
session.execute(query)
query = 'CREATE TABLE test.test (pk int, ck int, PRIMARY KEY (pk, ck));'
session.execute(query)
# with all nodes up, insert an RT and 2 rows on every node
#
# node1 | RT[0...] 0 1
# node2 | RT[0...] 0 1
session.execute('DELETE FROM test.test USING TIMESTAMP 0 WHERE pk = 0 AND ck >= 0;')
session.execute('INSERT INTO test.test (pk, ck) VALUES (0, 0) USING TIMESTAMP 1;')
session.execute('INSERT INTO test.test (pk, ck) VALUES (0, 1) USING TIMESTAMP 1;')
# with node1 down, delete row 0 on node2
#
# node1 | RT[0...] 0 1
# node2 | RT[0...] x 1
node1.stop(wait_other_notice=True)
session.execute('DELETE FROM test.test USING TIMESTAMP 1 WHERE pk = 0 AND ck = 0;')
node1.start(wait_for_binary_proto=True)
# with both nodes up, make a LIMIT 1 read that would trigger a short read protection
# request, which in turn will trigger the AssertionError in DataResolver (prior to
# CASSANDRA-14330 fix)
assert_all(session,
'SELECT ck FROM test.test WHERE pk = 0 LIMIT 1;',
[[1]],
cl=ConsistencyLevel.ALL)
@since('3.0')
@ported_to_in_jvm('4.0')
def test_13911(self):
"""
@jira_ticket CASSANDRA-13911
"""
cluster = self.cluster
# disable hinted handoff and set batch commit log so this doesn't interfere with the test
cluster.set_configuration_options(values={'hinted_handoff_enabled': False})
cluster.set_batch_commitlog(enabled=True, use_batch_window = cluster.version() < '5.0')
cluster.populate(2).start()
node1, node2 = cluster.nodelist()
session = self.patient_cql_connection(node1)
query = "CREATE KEYSPACE test WITH replication = {'class': 'NetworkTopologyStrategy', 'datacenter1': 2};"
session.execute(query)
query = 'CREATE TABLE test.test (pk int, ck int, PRIMARY KEY (pk, ck));'
session.execute(query)
# with node2 down, insert row 0 on node1