ClickHouse/tests/integration/test_broken_part_during_merge/test.py

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import pytest
from helpers.cluster import ClickHouseCluster
from multiprocessing.dummy import Pool
from helpers.network import PartitionManager
from helpers.corrupt_part_data_on_disk import corrupt_part_data_on_disk
import time
cluster = ClickHouseCluster(__file__)
node1 = cluster.add_instance('node1', with_zookeeper=True)
@pytest.fixture(scope="module")
def started_cluster():
try:
cluster.start()
node1.query('''
CREATE TABLE replicated_mt(date Date, id UInt32, value Int32)
ENGINE = ReplicatedMergeTree('/clickhouse/tables/replicated_mt', '{replica}') ORDER BY id;
'''.format(replica=node1.name))
yield cluster
finally:
cluster.shutdown()
def test_merge_and_part_corruption(started_cluster):
node1.query("SYSTEM STOP REPLICATION QUEUES replicated_mt")
for i in range(4):
node1.query("INSERT INTO replicated_mt SELECT toDate('2019-10-01'), number, number * number FROM numbers ({f}, 100000)".format(f=i*100000))
assert node1.query("SELECT COUNT() FROM system.parts WHERE table='replicated_mt' AND active=1") == "4\n"
# Need to corrupt "border part" (left or right). If we will corrupt something in the middle
# clickhouse will not consider merge as broken, because we have parts with the same min and max
# block numbers.
corrupt_part_data_on_disk(node1, 'replicated_mt', 'all_3_3_0')
with Pool(1) as p:
def optimize_with_delay(x):
node1.query("OPTIMIZE TABLE replicated_mt FINAL", timeout=30)
# corrupt part after merge already assigned, but not started
res_opt = p.apply_async(optimize_with_delay, (1,))
node1.query("CHECK TABLE replicated_mt", settings={"check_query_single_value_result": 0})
# start merge
node1.query("SYSTEM START REPLICATION QUEUES replicated_mt")
res_opt.get()
# will hung if checked bug not fixed
node1.query("ALTER TABLE replicated_mt UPDATE value = 7 WHERE 1", settings={"mutations_sync": 2}, timeout=30)
assert node1.query("SELECT sum(value) FROM replicated_mt") == "2100000\n"