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225 lines
8.2 KiB
Python
225 lines
8.2 KiB
Python
import os
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import sys
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import time
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import pytest
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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from helpers.cluster import ClickHouseCluster
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from helpers.network import PartitionManager
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from helpers.test_tools import TSV
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cluster = ClickHouseCluster(__file__)
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NODES = {'node_' + str(i): None for i in (1, 2, 3)}
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NODES['node'] = None
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# Sleep time in milliseconds.
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sleep_time = 30000
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@pytest.fixture(scope="module")
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def started_cluster():
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NODES['node'] = cluster.add_instance(
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'node', stay_alive=True, main_configs=['configs/remote_servers.xml'], user_configs=['configs/users.xml'])
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for name in NODES:
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if name != 'node':
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NODES[name] = cluster.add_instance(name, user_configs=['configs/users1.xml'])
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try:
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cluster.start()
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for node_id, node in list(NODES.items()):
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node.query('''CREATE TABLE test_hedged (id UInt32, date Date) ENGINE =
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MergeTree() ORDER BY id PARTITION BY toYYYYMM(date)''')
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node.query("INSERT INTO test_hedged select number, toDate(number) from numbers(100);")
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NODES['node'].query('''CREATE TABLE distributed (id UInt32, date Date) ENGINE =
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Distributed('test_cluster', 'default', 'test_hedged')''')
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yield cluster
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finally:
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cluster.shutdown()
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config = '''<clickhouse>
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<profiles>
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<default>
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<sleep_in_send_tables_status_ms>{sleep_in_send_tables_status_ms}</sleep_in_send_tables_status_ms>
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<sleep_in_send_data_ms>{sleep_in_send_data_ms}</sleep_in_send_data_ms>
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</default>
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</profiles>
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</clickhouse>'''
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def check_query(expected_replica, receive_timeout=300):
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NODES['node'].restart_clickhouse()
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# Without hedged requests select query will last more than 30 seconds,
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# with hedged requests it will last just around 1-2 second
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start = time.time()
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result = NODES['node'].query("SELECT hostName(), id FROM distributed ORDER BY id LIMIT 1 SETTINGS receive_timeout={}".format(receive_timeout));
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query_time = time.time() - start
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assert TSV(result) == TSV(expected_replica + "\t0")
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print("Query time:", query_time)
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assert query_time < 10
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def check_settings(node_name, sleep_in_send_tables_status_ms, sleep_in_send_data_ms):
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attempts = 0
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while attempts < 1000:
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setting1 = NODES[node_name].http_query("SELECT value FROM system.settings WHERE name='sleep_in_send_tables_status_ms'")
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setting2 = NODES[node_name].http_query("SELECT value FROM system.settings WHERE name='sleep_in_send_data_ms'")
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if int(setting1) == sleep_in_send_tables_status_ms and int(setting2) == sleep_in_send_data_ms:
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return
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time.sleep(0.1)
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attempts += 1
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assert attempts < 1000
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def check_changing_replica_events(expected_count):
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result = NODES['node'].query("SELECT value FROM system.events WHERE event='HedgedRequestsChangeReplica'")
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# If server load is high we can see more than expected
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# replica change events, but never less than expected
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assert int(result) >= expected_count
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def update_configs(node_1_sleep_in_send_tables_status=0, node_1_sleep_in_send_data=0,
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node_2_sleep_in_send_tables_status=0, node_2_sleep_in_send_data=0,
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node_3_sleep_in_send_tables_status=0, node_3_sleep_in_send_data=0):
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NODES['node_1'].replace_config(
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'/etc/clickhouse-server/users.d/users1.xml',
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config.format(sleep_in_send_tables_status_ms=node_1_sleep_in_send_tables_status, sleep_in_send_data_ms=node_1_sleep_in_send_data))
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NODES['node_2'].replace_config(
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'/etc/clickhouse-server/users.d/users1.xml',
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config.format(sleep_in_send_tables_status_ms=node_2_sleep_in_send_tables_status, sleep_in_send_data_ms=node_2_sleep_in_send_data))
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NODES['node_3'].replace_config(
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'/etc/clickhouse-server/users.d/users1.xml',
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config.format(sleep_in_send_tables_status_ms=node_3_sleep_in_send_tables_status, sleep_in_send_data_ms=node_3_sleep_in_send_data))
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check_settings('node_1', node_1_sleep_in_send_tables_status, node_1_sleep_in_send_data)
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check_settings('node_2', node_2_sleep_in_send_tables_status, node_2_sleep_in_send_data)
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check_settings('node_3', node_3_sleep_in_send_tables_status, node_3_sleep_in_send_data)
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def test_stuck_replica(started_cluster):
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update_configs()
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cluster.pause_container("node_1")
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check_query(expected_replica="node_2")
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check_changing_replica_events(1)
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result = NODES['node'].query("SELECT slowdowns_count FROM system.clusters WHERE cluster='test_cluster' and host_name='node_1'")
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assert TSV(result) == TSV("1")
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result = NODES['node'].query("SELECT hostName(), id FROM distributed ORDER BY id LIMIT 1");
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assert TSV(result) == TSV("node_2\t0")
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# Check that we didn't choose node_1 first again and slowdowns_count didn't increase.
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result = NODES['node'].query("SELECT slowdowns_count FROM system.clusters WHERE cluster='test_cluster' and host_name='node_1'")
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assert TSV(result) == TSV("1")
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cluster.unpause_container("node_1")
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def test_long_query(started_cluster):
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update_configs()
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# Restart to reset pool states.
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NODES['node'].restart_clickhouse()
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result = NODES['node'].query("select hostName(), max(id + sleep(1.5)) from distributed settings max_block_size = 1, max_threads = 1;")
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assert TSV(result) == TSV("node_1\t99")
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NODES['node'].query("INSERT INTO distributed select number, toDate(number) from numbers(100);")
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def test_send_table_status_sleep(started_cluster):
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update_configs(node_1_sleep_in_send_tables_status=sleep_time)
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check_query(expected_replica="node_2")
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check_changing_replica_events(1)
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def test_send_table_status_sleep2(started_cluster):
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update_configs(node_1_sleep_in_send_tables_status=sleep_time, node_2_sleep_in_send_tables_status=sleep_time)
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check_query(expected_replica="node_3")
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check_changing_replica_events(2)
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def test_send_data(started_cluster):
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update_configs(node_1_sleep_in_send_data=sleep_time)
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check_query(expected_replica="node_2")
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check_changing_replica_events(1)
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def test_send_data2(started_cluster):
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update_configs(node_1_sleep_in_send_data=sleep_time, node_2_sleep_in_send_data=sleep_time)
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check_query(expected_replica="node_3")
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check_changing_replica_events(2)
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def test_combination1(started_cluster):
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update_configs(node_1_sleep_in_send_tables_status=sleep_time, node_2_sleep_in_send_data=sleep_time)
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check_query(expected_replica="node_3")
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check_changing_replica_events(2)
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def test_combination2(started_cluster):
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update_configs(node_1_sleep_in_send_data=sleep_time, node_2_sleep_in_send_tables_status=sleep_time)
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check_query(expected_replica="node_3")
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check_changing_replica_events(2)
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def test_combination3(started_cluster):
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update_configs(node_1_sleep_in_send_data=sleep_time,
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node_2_sleep_in_send_tables_status=1000,
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node_3_sleep_in_send_data=sleep_time)
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check_query(expected_replica="node_2")
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check_changing_replica_events(3)
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def test_combination4(started_cluster):
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update_configs(node_1_sleep_in_send_tables_status=1000,
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node_1_sleep_in_send_data=sleep_time,
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node_2_sleep_in_send_tables_status=1000,
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node_3_sleep_in_send_tables_status=1000)
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check_query(expected_replica="node_2")
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check_changing_replica_events(4)
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def test_receive_timeout1(started_cluster):
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# Check the situation when first two replicas get receive timeout
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# in establishing connection, but the third replica is ok.
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update_configs(node_1_sleep_in_send_tables_status=3000,
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node_2_sleep_in_send_tables_status=3000,
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node_3_sleep_in_send_data=1000)
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check_query(expected_replica="node_3", receive_timeout=2)
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check_changing_replica_events(2)
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def test_receive_timeout2(started_cluster):
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# Check the situation when first replica get receive timeout
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# in packet receiving but there are replicas in process of
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# connection establishing.
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update_configs(node_1_sleep_in_send_data=4000,
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node_2_sleep_in_send_tables_status=2000,
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node_3_sleep_in_send_tables_status=2000)
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check_query(expected_replica="node_2", receive_timeout=3)
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check_changing_replica_events(3)
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