ClickHouse/tests/integration/test_dictionaries_update_and_reload/test.py
2022-03-22 17:39:58 +01:00

353 lines
13 KiB
Python

import os
import time
import pytest
from helpers.client import QueryTimeoutExceedException
from helpers.cluster import ClickHouseCluster
from helpers.test_tools import assert_eq_with_retry
SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
DICTIONARY_FILES = [
"configs/dictionaries/cache_xypairs.xml",
"configs/dictionaries/executable.xml",
"configs/dictionaries/file.xml",
"configs/dictionaries/file.txt",
"configs/dictionaries/slow.xml",
]
cluster = ClickHouseCluster(__file__)
instance = cluster.add_instance("instance", dictionaries=DICTIONARY_FILES)
@pytest.fixture(scope="module")
def started_cluster():
try:
cluster.start()
instance.query("CREATE DATABASE IF NOT EXISTS test")
yield cluster
finally:
cluster.shutdown()
def get_status(dictionary_name):
return instance.query(
"SELECT status FROM system.dictionaries WHERE name='" + dictionary_name + "'"
).rstrip("\n")
def get_last_exception(dictionary_name):
return (
instance.query(
"SELECT last_exception FROM system.dictionaries WHERE name='"
+ dictionary_name
+ "'"
)
.rstrip("\n")
.replace("\\'", "'")
)
def get_loading_start_time(dictionary_name):
s = instance.query(
"SELECT toTimeZone(loading_start_time, 'UTC') FROM system.dictionaries WHERE name='"
+ dictionary_name
+ "'"
).rstrip("\n")
if s == "1970-01-01 00:00:00":
return None
return time.strptime(s, "%Y-%m-%d %H:%M:%S")
def get_last_successful_update_time(dictionary_name):
s = instance.query(
"SELECT toTimeZone(last_successful_update_time, 'UTC') FROM system.dictionaries WHERE name='"
+ dictionary_name
+ "'"
).rstrip("\n")
if s == "1970-01-01 00:00:00":
return None
return time.strptime(s, "%Y-%m-%d %H:%M:%S")
def get_loading_duration(dictionary_name):
return float(
instance.query(
"SELECT loading_duration FROM system.dictionaries WHERE name='"
+ dictionary_name
+ "'"
)
)
def replace_in_file_in_container(file_name, what, replace_with):
instance.exec_in_container(["sed", "-i", f"s/{what}/{replace_with}/g", file_name])
def test_reload_while_loading(started_cluster):
query = instance.query
# dictionaries_lazy_load == false, so this dictionary is not loaded.
assert get_status("slow") == "NOT_LOADED"
assert get_loading_duration("slow") == 0
# It's not possible to get a value from the dictionary within 0.5 second, so the following query fails by timeout.
with pytest.raises(QueryTimeoutExceedException):
query("SELECT dictGetInt32('slow', 'a', toUInt64(5))", timeout=0.5)
# The dictionary is now loading.
assert get_status("slow") == "LOADING"
start_time, duration = get_loading_start_time("slow"), get_loading_duration("slow")
assert duration > 0
time.sleep(0.5) # Still loading.
assert get_status("slow") == "LOADING"
prev_start_time, prev_duration = start_time, duration
start_time, duration = get_loading_start_time("slow"), get_loading_duration("slow")
assert start_time == prev_start_time
assert duration >= prev_duration
# SYSTEM RELOAD DICTIONARY should restart loading.
with pytest.raises(QueryTimeoutExceedException):
query("SYSTEM RELOAD DICTIONARY 'slow'", timeout=0.5)
assert get_status("slow") == "LOADING"
prev_start_time, prev_duration = start_time, duration
start_time, duration = get_loading_start_time("slow"), get_loading_duration("slow")
assert start_time > prev_start_time
assert duration < prev_duration
time.sleep(0.5) # Still loading.
assert get_status("slow") == "LOADING"
prev_start_time, prev_duration = start_time, duration
start_time, duration = get_loading_start_time("slow"), get_loading_duration("slow")
assert start_time == prev_start_time
assert duration >= prev_duration
# Changing the configuration file should restart loading again.
replace_in_file_in_container(
"/etc/clickhouse-server/dictionaries/slow.xml", "sleep 100", "sleep 0"
)
time.sleep(5) # Configuration files are reloaded once in 5 seconds.
# This time loading should finish quickly.
assert get_status("slow") == "LOADED"
last_successful_update_time = get_last_successful_update_time("slow")
assert last_successful_update_time > start_time
assert query("SELECT dictGetInt32('slow', 'a', toUInt64(5))") == "6\n"
def test_reload_after_loading(started_cluster):
query = instance.query
assert query("SELECT dictGetInt32('executable', 'a', toUInt64(7))") == "8\n"
assert query("SELECT dictGetInt32('file', 'a', toUInt64(9))") == "10\n"
# Change the dictionaries' data.
# FIXME we sleep before this, because Poco 1.x has one-second granularity
# for mtime, and clickhouse will miss the update if we change the file too
# soon. Should probably be fixed by switching to use std::filesystem.
time.sleep(1)
replace_in_file_in_container(
"/etc/clickhouse-server/dictionaries/executable.xml", "8", "81"
)
replace_in_file_in_container(
"/etc/clickhouse-server/dictionaries/file.txt", "10", "101"
)
# SYSTEM RELOAD 'name' reloads only the specified dictionary.
query("SYSTEM RELOAD DICTIONARY 'executable'")
assert query("SELECT dictGetInt32('executable', 'a', toUInt64(7))") == "81\n"
assert query("SELECT dictGetInt32('file', 'a', toUInt64(9))") == "10\n"
query("SYSTEM RELOAD DICTIONARY 'file'")
assert query("SELECT dictGetInt32('executable', 'a', toUInt64(7))") == "81\n"
assert query("SELECT dictGetInt32('file', 'a', toUInt64(9))") == "101\n"
# SYSTEM RELOAD DICTIONARIES reloads all loaded dictionaries.
time.sleep(1) # see the comment above
replace_in_file_in_container(
"/etc/clickhouse-server/dictionaries/executable.xml", "81", "82"
)
replace_in_file_in_container(
"/etc/clickhouse-server/dictionaries/file.txt", "101", "102"
)
query("SYSTEM RELOAD DICTIONARY 'file'")
query("SYSTEM RELOAD DICTIONARY 'executable'")
assert query("SELECT dictGetInt32('executable', 'a', toUInt64(7))") == "82\n"
assert query("SELECT dictGetInt32('file', 'a', toUInt64(9))") == "102\n"
# Configuration files are reloaded and lifetimes are checked automatically once in 5 seconds.
# Wait slightly more, to be sure it did reload.
time.sleep(1) # see the comment above
replace_in_file_in_container(
"/etc/clickhouse-server/dictionaries/executable.xml", "82", "83"
)
replace_in_file_in_container(
"/etc/clickhouse-server/dictionaries/file.txt", "102", "103"
)
time.sleep(10)
assert query("SELECT dictGetInt32('file', 'a', toUInt64(9))") == "103\n"
assert query("SELECT dictGetInt32('executable', 'a', toUInt64(7))") == "83\n"
def test_reload_after_fail_by_system_reload(started_cluster):
query = instance.query
# dictionaries_lazy_load == false, so this dictionary is not loaded.
assert get_status("no_file") == "NOT_LOADED"
# We expect an error because the file source doesn't exist.
no_such_file_error = "No such file"
assert no_such_file_error in instance.query_and_get_error(
"SELECT dictGetInt32('no_file', 'a', toUInt64(9))"
)
assert get_status("no_file") == "FAILED"
# SYSTEM RELOAD should not change anything now, the status is still FAILED.
assert no_such_file_error in instance.query_and_get_error(
"SYSTEM RELOAD DICTIONARY 'no_file'"
)
assert no_such_file_error in instance.query_and_get_error(
"SELECT dictGetInt32('no_file', 'a', toUInt64(9))"
)
assert get_status("no_file") == "FAILED"
# Creating the file source makes the dictionary able to load.
instance.copy_file_to_container(
os.path.join(SCRIPT_DIR, "configs/dictionaries/file.txt"),
"/etc/clickhouse-server/dictionaries/no_file.txt",
)
query("SYSTEM RELOAD DICTIONARY 'no_file'")
query("SELECT dictGetInt32('no_file', 'a', toUInt64(9))") == "10\n"
assert get_status("no_file") == "LOADED"
# Removing the file source should not spoil the loaded dictionary.
instance.exec_in_container(
["rm", "/etc/clickhouse-server/dictionaries/no_file.txt"]
)
assert no_such_file_error in instance.query_and_get_error(
"SYSTEM RELOAD DICTIONARY 'no_file'"
)
query("SELECT dictGetInt32('no_file', 'a', toUInt64(9))") == "10\n"
assert get_status("no_file") == "LOADED"
def test_reload_after_fail_by_timer(started_cluster):
# dictionaries_lazy_load == false, so this dictionary is not loaded.
assert get_status("no_file_2") == "NOT_LOADED"
# We expect an error because the file source doesn't exist.
expected_error = "No such file"
assert expected_error in instance.query_and_get_error(
"SELECT dictGetInt32('no_file_2', 'a', toUInt64(9))"
)
assert get_status("no_file_2") == "FAILED"
# Passed time should not change anything now, the status is still FAILED.
time.sleep(6)
assert expected_error in instance.query_and_get_error(
"SELECT dictGetInt32('no_file_2', 'a', toUInt64(9))"
)
assert get_status("no_file_2") == "FAILED"
# Creating the file source makes the dictionary able to load.
instance.copy_file_to_container(
os.path.join(SCRIPT_DIR, "configs/dictionaries/file.txt"),
"/etc/clickhouse-server/dictionaries/no_file_2.txt",
)
# Check that file appears in container and wait if needed.
while not instance.path_exists("/etc/clickhouse-server/dictionaries/no_file_2.txt"):
time.sleep(1)
assert "9\t10\n" == instance.exec_in_container(
["cat", "/etc/clickhouse-server/dictionaries/no_file_2.txt"]
)
instance.query("SYSTEM RELOAD DICTIONARY no_file_2")
instance.query("SELECT dictGetInt32('no_file_2', 'a', toUInt64(9))") == "10\n"
assert get_status("no_file_2") == "LOADED"
# Removing the file source should not spoil the loaded dictionary.
instance.exec_in_container(
["rm", "/etc/clickhouse-server/dictionaries/no_file_2.txt"]
)
time.sleep(6)
instance.query("SELECT dictGetInt32('no_file_2', 'a', toUInt64(9))") == "10\n"
assert get_status("no_file_2") == "LOADED"
def test_reload_after_fail_in_cache_dictionary(started_cluster):
query = instance.query
query_and_get_error = instance.query_and_get_error
# Can't get a value from the cache dictionary because the source (table `test.xypairs`) doesn't respond.
expected_error = "Table test.xypairs doesn't exist"
update_error = "Could not update cache dictionary cache_xypairs now"
assert expected_error in query_and_get_error(
"SELECT dictGetUInt64('cache_xypairs', 'y', toUInt64(1))"
)
assert get_status("cache_xypairs") == "LOADED"
assert expected_error in get_last_exception("cache_xypairs")
# Create table `test.xypairs`.
query(
"""
DROP TABLE IF EXISTS test.xypairs;
CREATE TABLE test.xypairs (x UInt64, y UInt64) ENGINE=Log;
INSERT INTO test.xypairs VALUES (1, 56), (3, 78);
"""
)
# Cache dictionary now works.
assert_eq_with_retry(
instance,
"SELECT dictGet('cache_xypairs', 'y', toUInt64(1))",
"56",
ignore_error=True,
)
query("SELECT dictGet('cache_xypairs', 'y', toUInt64(2))") == "0"
assert get_last_exception("cache_xypairs") == ""
# Drop table `test.xypairs`.
query("DROP TABLE test.xypairs")
# Values are cached so we can get them.
query("SELECT dictGet('cache_xypairs', 'y', toUInt64(1))") == "56"
query("SELECT dictGet('cache_xypairs', 'y', toUInt64(2))") == "0"
assert get_last_exception("cache_xypairs") == ""
# But we can't get a value from the source table which isn't cached.
assert expected_error in query_and_get_error(
"SELECT dictGetUInt64('cache_xypairs', 'y', toUInt64(3))"
)
assert expected_error in get_last_exception("cache_xypairs")
# Passed time should not spoil the cache.
time.sleep(5)
query("SELECT dictGet('cache_xypairs', 'y', toUInt64(1))") == "56"
query("SELECT dictGet('cache_xypairs', 'y', toUInt64(2))") == "0"
error = query_and_get_error(
"SELECT dictGetUInt64('cache_xypairs', 'y', toUInt64(3))"
)
assert (expected_error in error) or (update_error in error)
last_exception = get_last_exception("cache_xypairs")
assert (expected_error in last_exception) or (update_error in last_exception)
# Create table `test.xypairs` again with changed values.
query(
"""
CREATE TABLE test.xypairs (x UInt64, y UInt64) ENGINE=Log;
INSERT INTO test.xypairs VALUES (1, 57), (3, 79);
"""
)
query("SYSTEM RELOAD DICTIONARY cache_xypairs")
# The cache dictionary returns new values now.
assert_eq_with_retry(
instance, "SELECT dictGet('cache_xypairs', 'y', toUInt64(1))", "57"
)
query("SELECT dictGet('cache_xypairs', 'y', toUInt64(2))") == "0"
query("SELECT dictGet('cache_xypairs', 'y', toUInt64(3))") == "79"
assert get_last_exception("cache_xypairs") == ""