7a539f227a
PYTHON-2296 Test behavior of connectTimeoutMS=0 with streaming protocol PYTHON-2311 Workaround inherent race in flaky streaming protocol test
230 lines
8.6 KiB
Python
230 lines
8.6 KiB
Python
# Copyright 2020-present MongoDB, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Test the database module."""
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import sys
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import time
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sys.path[0:0] = [""]
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from pymongo import monitoring
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from test import (client_context,
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IntegrationTest,
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unittest)
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from test.utils import (HeartbeatEventListener,
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rs_or_single_client,
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single_client,
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ServerEventListener,
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wait_until)
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class TestStreamingProtocol(IntegrationTest):
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@client_context.require_failCommand_appName
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def test_failCommand_streaming(self):
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listener = ServerEventListener()
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hb_listener = HeartbeatEventListener()
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client = rs_or_single_client(
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event_listeners=[listener, hb_listener], heartbeatFrequencyMS=500,
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appName='failingIsMasterTest')
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self.addCleanup(client.close)
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# Force a connection.
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client.admin.command('ping')
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address = client.address
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listener.reset()
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fail_ismaster = {
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'configureFailPoint': 'failCommand',
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'mode': {'times': 4},
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'data': {
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'failCommands': ['isMaster'],
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'closeConnection': False,
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'errorCode': 10107,
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'appName': 'failingIsMasterTest',
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},
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}
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with self.fail_point(fail_ismaster):
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def _marked_unknown(event):
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return (event.server_address == address
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and not event.new_description.is_server_type_known)
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def _discovered_node(event):
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return (event.server_address == address
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and not event.previous_description.is_server_type_known
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and event.new_description.is_server_type_known)
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def marked_unknown():
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return len(listener.matching(_marked_unknown)) >= 1
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def rediscovered():
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return len(listener.matching(_discovered_node)) >= 1
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# Topology events are published asynchronously
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wait_until(marked_unknown, 'mark node unknown')
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wait_until(rediscovered, 'rediscover node')
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# Server should be selectable.
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client.admin.command('ping')
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@client_context.require_failCommand_appName
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def test_streaming_rtt(self):
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listener = ServerEventListener()
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hb_listener = HeartbeatEventListener()
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# On Windows, RTT can actually be 0.0 because time.time() only has
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# 1-15 millisecond resolution. We need to delay the initial isMaster
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# to ensure that RTT is never zero.
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name = 'streamingRttTest'
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delay_ismaster = {
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'configureFailPoint': 'failCommand',
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'mode': {'times': 1000},
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'data': {
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'failCommands': ['isMaster'],
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'blockConnection': True,
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'blockTimeMS': 20,
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# This can be uncommented after SERVER-49220 is fixed.
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# 'appName': name,
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},
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}
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with self.fail_point(delay_ismaster):
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client = rs_or_single_client(
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event_listeners=[listener, hb_listener],
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heartbeatFrequencyMS=500,
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appName=name)
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self.addCleanup(client.close)
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# Force a connection.
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client.admin.command('ping')
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address = client.address
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delay_ismaster['data']['blockTimeMS'] = 500
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delay_ismaster['data']['appName'] = name
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with self.fail_point(delay_ismaster):
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def rtt_exceeds_250_ms():
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# XXX: Add a public TopologyDescription getter to MongoClient?
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topology = client._topology
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sd = topology.description.server_descriptions()[address]
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return sd.round_trip_time > 0.250
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wait_until(rtt_exceeds_250_ms, 'exceed 250ms RTT')
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# Server should be selectable.
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client.admin.command('ping')
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def changed_event(event):
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return (event.server_address == address and isinstance(
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event, monitoring.ServerDescriptionChangedEvent))
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# There should only be one event published, for the initial discovery.
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events = listener.matching(changed_event)
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self.assertEqual(1, len(events))
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self.assertGreater(events[0].new_description.round_trip_time, 0)
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@client_context.require_failCommand_appName
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def test_monitor_waits_after_server_check_error(self):
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hb_listener = HeartbeatEventListener()
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client = rs_or_single_client(
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event_listeners=[hb_listener], heartbeatFrequencyMS=500,
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appName='waitAfterErrorTest')
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self.addCleanup(client.close)
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# Force a connection.
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client.admin.command('ping')
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address = client.address
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fail_ismaster = {
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'mode': {'times': 50},
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'data': {
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'failCommands': ['isMaster'],
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'closeConnection': False,
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'errorCode': 91,
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# This can be uncommented after SERVER-49220 is fixed.
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# 'appName': 'waitAfterErrorTest',
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},
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}
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with self.fail_point(fail_ismaster):
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time.sleep(2)
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# Server should be selectable.
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client.admin.command('ping')
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def hb_started(event):
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return (isinstance(event, monitoring.ServerHeartbeatStartedEvent)
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and event.connection_id == address)
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hb_started_events = hb_listener.matching(hb_started)
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# Explanation of the expected heartbeat events:
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# Time: event
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# 0ms: create MongoClient
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# 1ms: run monitor handshake, 1
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# 2ms: run awaitable isMaster, 2
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# 3ms: run configureFailPoint
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# 502ms: isMaster fails for the first time with command error
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# 1002ms: run monitor handshake, 3
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# 1502ms: run monitor handshake, 4
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# 2002ms: run monitor handshake, 5
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# 2003ms: disable configureFailPoint
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# 2004ms: isMaster succeeds, 6
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# 2004ms: awaitable isMaster, 7
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self.assertGreater(len(hb_started_events), 7)
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# This can be reduced to ~15 after SERVER-49220 is fixed.
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self.assertLess(len(hb_started_events), 40)
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@client_context.require_failCommand_appName
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def test_heartbeat_awaited_flag(self):
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hb_listener = HeartbeatEventListener()
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client = single_client(
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event_listeners=[hb_listener], heartbeatFrequencyMS=500,
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appName='heartbeatEventAwaitedFlag')
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self.addCleanup(client.close)
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# Force a connection.
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client.admin.command('ping')
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def hb_succeeded(event):
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return isinstance(event, monitoring.ServerHeartbeatSucceededEvent)
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def hb_failed(event):
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return isinstance(event, monitoring.ServerHeartbeatFailedEvent)
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fail_heartbeat = {
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'mode': {'times': 2},
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'data': {
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'failCommands': ['isMaster'],
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'closeConnection': True,
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'appName': 'heartbeatEventAwaitedFlag',
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},
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}
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with self.fail_point(fail_heartbeat):
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wait_until(lambda: hb_listener.matching(hb_failed),
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"published failed event")
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# Reconnect.
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client.admin.command('ping')
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hb_succeeded_events = hb_listener.matching(hb_succeeded)
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hb_failed_events = hb_listener.matching(hb_failed)
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self.assertFalse(hb_succeeded_events[0].awaited)
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self.assertTrue(hb_failed_events[0].awaited)
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# Depending on thread scheduling, the failed heartbeat could occur on
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# the second or third check.
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events = [type(e) for e in hb_listener.results[:4]]
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if events == [monitoring.ServerHeartbeatStartedEvent,
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monitoring.ServerHeartbeatSucceededEvent,
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monitoring.ServerHeartbeatStartedEvent,
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monitoring.ServerHeartbeatFailedEvent]:
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self.assertFalse(hb_succeeded_events[1].awaited)
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else:
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self.assertTrue(hb_succeeded_events[1].awaited)
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if __name__ == "__main__":
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unittest.main()
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