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synapse/tests/util/test_retryutils.py
Erik Johnston 23740eaa3d
Correctly mention previous copyright ()
During the migration the automated script to update the copyright
headers accidentally got rid of some of the existing copyright lines.
Reinstate them.
2024-01-23 11:26:48 +00:00

243 lines
8.5 KiB
Python

#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright 2019 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
from unittest import mock
from synapse.notifier import Notifier
from synapse.replication.tcp.handler import ReplicationCommandHandler
from synapse.util.retryutils import NotRetryingDestination, get_retry_limiter
from tests.unittest import HomeserverTestCase
class RetryLimiterTestCase(HomeserverTestCase):
def test_new_destination(self) -> None:
"""A happy-path case with a new destination and a successful operation"""
store = self.hs.get_datastores().main
limiter = self.get_success(get_retry_limiter("test_dest", self.clock, store))
# advance the clock a bit before making the request
self.pump(1)
with limiter:
pass
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
self.assertIsNone(new_timings)
def test_limiter(self) -> None:
"""General test case which walks through the process of a failing request"""
store = self.hs.get_datastores().main
limiter = self.get_success(get_retry_limiter("test_dest", self.clock, store))
min_retry_interval_ms = (
self.hs.config.federation.destination_min_retry_interval_ms
)
retry_multiplier = self.hs.config.federation.destination_retry_multiplier
self.pump(1)
try:
with limiter:
self.pump(1)
failure_ts = self.clock.time_msec()
raise AssertionError("argh")
except AssertionError:
pass
self.pump()
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
assert new_timings is not None
self.assertEqual(new_timings.failure_ts, failure_ts)
self.assertEqual(new_timings.retry_last_ts, failure_ts)
self.assertEqual(new_timings.retry_interval, min_retry_interval_ms)
# now if we try again we should get a failure
self.get_failure(
get_retry_limiter("test_dest", self.clock, store), NotRetryingDestination
)
#
# advance the clock and try again
#
self.pump(min_retry_interval_ms)
limiter = self.get_success(get_retry_limiter("test_dest", self.clock, store))
self.pump(1)
try:
with limiter:
self.pump(1)
retry_ts = self.clock.time_msec()
raise AssertionError("argh")
except AssertionError:
pass
self.pump()
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
assert new_timings is not None
self.assertEqual(new_timings.failure_ts, failure_ts)
self.assertEqual(new_timings.retry_last_ts, retry_ts)
self.assertGreaterEqual(
new_timings.retry_interval, min_retry_interval_ms * retry_multiplier * 0.5
)
self.assertLessEqual(
new_timings.retry_interval, min_retry_interval_ms * retry_multiplier * 2.0
)
#
# one more go, with success
#
self.reactor.advance(min_retry_interval_ms * retry_multiplier * 2.0)
limiter = self.get_success(get_retry_limiter("test_dest", self.clock, store))
self.pump(1)
with limiter:
self.pump(1)
# wait for the update to land
self.pump()
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
self.assertIsNone(new_timings)
def test_notifier_replication(self) -> None:
"""Ensure the notifier/replication client is called only when expected."""
store = self.hs.get_datastores().main
notifier = mock.Mock(spec=Notifier)
replication_client = mock.Mock(spec=ReplicationCommandHandler)
limiter = self.get_success(
get_retry_limiter(
"test_dest",
self.clock,
store,
notifier=notifier,
replication_client=replication_client,
)
)
# The server is already up, nothing should occur.
self.pump(1)
with limiter:
pass
self.pump()
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
self.assertIsNone(new_timings)
notifier.notify_remote_server_up.assert_not_called()
replication_client.send_remote_server_up.assert_not_called()
# Attempt again, but return an error. This will cause new retry timings, but
# should not trigger server up notifications.
self.pump(1)
try:
with limiter:
raise AssertionError("argh")
except AssertionError:
pass
self.pump()
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
# The exact retry timings are tested separately.
self.assertIsNotNone(new_timings)
notifier.notify_remote_server_up.assert_not_called()
replication_client.send_remote_server_up.assert_not_called()
# A second failing request should be treated as the above.
self.pump(1)
try:
with limiter:
raise AssertionError("argh")
except AssertionError:
pass
self.pump()
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
# The exact retry timings are tested separately.
self.assertIsNotNone(new_timings)
notifier.notify_remote_server_up.assert_not_called()
replication_client.send_remote_server_up.assert_not_called()
# A final successful attempt should generate a server up notification.
self.pump(1)
with limiter:
pass
self.pump()
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
# The exact retry timings are tested separately.
self.assertIsNone(new_timings)
notifier.notify_remote_server_up.assert_called_once_with("test_dest")
replication_client.send_remote_server_up.assert_called_once_with("test_dest")
def test_max_retry_interval(self) -> None:
"""Test that `destination_max_retry_interval` setting works as expected"""
store = self.hs.get_datastores().main
destination_max_retry_interval_ms = (
self.hs.config.federation.destination_max_retry_interval_ms
)
self.get_success(get_retry_limiter("test_dest", self.clock, store))
self.pump(1)
failure_ts = self.clock.time_msec()
# Simulate reaching destination_max_retry_interval
self.get_success(
store.set_destination_retry_timings(
"test_dest",
failure_ts=failure_ts,
retry_last_ts=failure_ts,
retry_interval=destination_max_retry_interval_ms,
)
)
# Check it fails
self.get_failure(
get_retry_limiter("test_dest", self.clock, store), NotRetryingDestination
)
# Get past retry_interval and we can try again, and still throw an error to continue the backoff
self.reactor.advance(destination_max_retry_interval_ms / 1000 + 1)
limiter = self.get_success(get_retry_limiter("test_dest", self.clock, store))
self.pump(1)
try:
with limiter:
self.pump(1)
raise AssertionError("argh")
except AssertionError:
pass
self.pump()
# retry_interval does not increase and stays at destination_max_retry_interval_ms
new_timings = self.get_success(store.get_destination_retry_timings("test_dest"))
assert new_timings is not None
self.assertEqual(new_timings.retry_interval, destination_max_retry_interval_ms)
# Check it fails
self.get_failure(
get_retry_limiter("test_dest", self.clock, store), NotRetryingDestination
)