634 lines
24 KiB
Python
634 lines
24 KiB
Python
# Copyright 2017-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 retryable writes."""
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from __future__ import annotations
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import asyncio
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import copy
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import pprint
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import sys
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import threading
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from test.utils import set_fail_point
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sys.path[0:0] = [""]
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from test import (
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IntegrationTest,
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SkipTest,
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client_context,
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unittest,
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)
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from test.helpers import client_knobs
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from test.utils_shared import (
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CMAPListener,
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DeprecationFilter,
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EventListener,
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OvertCommandListener,
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)
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from test.version import Version
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from bson.codec_options import DEFAULT_CODEC_OPTIONS
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from bson.int64 import Int64
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from bson.raw_bson import RawBSONDocument
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from bson.son import SON
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from pymongo.errors import (
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AutoReconnect,
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ConnectionFailure,
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OperationFailure,
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ServerSelectionTimeoutError,
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WriteConcernError,
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)
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from pymongo.monitoring import (
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CommandSucceededEvent,
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ConnectionCheckedOutEvent,
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ConnectionCheckOutFailedEvent,
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ConnectionCheckOutFailedReason,
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PoolClearedEvent,
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)
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from pymongo.operations import (
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DeleteMany,
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DeleteOne,
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InsertOne,
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ReplaceOne,
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UpdateMany,
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UpdateOne,
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)
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from pymongo.write_concern import WriteConcern
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_IS_SYNC = True
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class InsertEventListener(EventListener):
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def succeeded(self, event: CommandSucceededEvent) -> None:
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super().succeeded(event)
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if (
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event.command_name == "insert"
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and event.reply.get("writeConcernError", {}).get("code", None) == 91
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):
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client_context.client.admin.command(
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{
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"configureFailPoint": "failCommand",
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"mode": {"times": 1},
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"data": {
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"errorCode": 10107,
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"errorLabels": ["RetryableWriteError", "NoWritesPerformed"],
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"failCommands": ["insert"],
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},
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}
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)
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def retryable_single_statement_ops(coll):
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return [
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(coll.bulk_write, [[InsertOne({}), InsertOne({})]], {}),
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(coll.bulk_write, [[InsertOne({}), InsertOne({})]], {"ordered": False}),
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(coll.bulk_write, [[ReplaceOne({}, {"a1": 1})]], {}),
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(coll.bulk_write, [[ReplaceOne({}, {"a2": 1}), ReplaceOne({}, {"a3": 1})]], {}),
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(
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coll.bulk_write,
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[[UpdateOne({}, {"$set": {"a4": 1}}), UpdateOne({}, {"$set": {"a5": 1}})]],
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{},
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),
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(coll.bulk_write, [[DeleteOne({})]], {}),
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(coll.bulk_write, [[DeleteOne({}), DeleteOne({})]], {}),
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(coll.insert_one, [{}], {}),
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(coll.insert_many, [[{}, {}]], {}),
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(coll.replace_one, [{}, {"a6": 1}], {}),
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(coll.update_one, [{}, {"$set": {"a7": 1}}], {}),
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(coll.delete_one, [{}], {}),
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(coll.find_one_and_replace, [{}, {"a8": 1}], {}),
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(coll.find_one_and_update, [{}, {"$set": {"a9": 1}}], {}),
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(coll.find_one_and_delete, [{}, {"a10": 1}], {}),
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]
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def non_retryable_single_statement_ops(coll):
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return [
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(
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coll.bulk_write,
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[[UpdateOne({}, {"$set": {"a": 1}}), UpdateMany({}, {"$set": {"a": 1}})]],
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{},
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),
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(coll.bulk_write, [[DeleteOne({}), DeleteMany({})]], {}),
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(coll.update_many, [{}, {"$set": {"a": 1}}], {}),
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(coll.delete_many, [{}], {}),
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]
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class IgnoreDeprecationsTest(IntegrationTest):
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RUN_ON_LOAD_BALANCER = True
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RUN_ON_SERVERLESS = True
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deprecation_filter: DeprecationFilter
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def setUp(self) -> None:
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super().setUp()
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self.deprecation_filter = DeprecationFilter()
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def tearDown(self) -> None:
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self.deprecation_filter.stop()
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class TestRetryableWritesMMAPv1(IgnoreDeprecationsTest):
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knobs: client_knobs
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def setUp(self) -> None:
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super().setUp()
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# Speed up the tests by decreasing the heartbeat frequency.
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self.knobs = client_knobs(heartbeat_frequency=0.1, min_heartbeat_interval=0.1)
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self.knobs.enable()
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self.client = self.rs_or_single_client(retryWrites=True)
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self.db = self.client.pymongo_test
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def tearDown(self) -> None:
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self.knobs.disable()
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@client_context.require_no_standalone
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def test_actionable_error_message(self):
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if client_context.storage_engine != "mmapv1":
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raise SkipTest("This cluster is not running MMAPv1")
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expected_msg = (
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"This MongoDB deployment does not support retryable "
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"writes. Please add retryWrites=false to your "
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"connection string."
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)
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for method, args, kwargs in retryable_single_statement_ops(self.db.retryable_write_test):
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with self.assertRaisesRegex(OperationFailure, expected_msg):
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method(*args, **kwargs)
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class TestRetryableWrites(IgnoreDeprecationsTest):
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listener: OvertCommandListener
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knobs: client_knobs
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@client_context.require_no_mmap
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def setUp(self) -> None:
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super().setUp()
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# Speed up the tests by decreasing the heartbeat frequency.
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self.knobs = client_knobs(heartbeat_frequency=0.1, min_heartbeat_interval=0.1)
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self.knobs.enable()
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self.listener = OvertCommandListener()
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self.client = self.rs_or_single_client(retryWrites=True, event_listeners=[self.listener])
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self.db = self.client.pymongo_test
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if client_context.is_rs and client_context.test_commands_enabled:
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self.client.admin.command(
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SON([("configureFailPoint", "onPrimaryTransactionalWrite"), ("mode", "alwaysOn")])
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)
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def tearDown(self):
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if client_context.is_rs and client_context.test_commands_enabled:
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self.client.admin.command(
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SON([("configureFailPoint", "onPrimaryTransactionalWrite"), ("mode", "off")])
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)
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self.knobs.disable()
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def test_supported_single_statement_no_retry(self):
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listener = OvertCommandListener()
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client = self.rs_or_single_client(retryWrites=False, event_listeners=[listener])
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for method, args, kwargs in retryable_single_statement_ops(client.db.retryable_write_test):
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msg = f"{method.__name__}(*{args!r}, **{kwargs!r})"
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listener.reset()
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method(*args, **kwargs)
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for event in listener.started_events:
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self.assertNotIn(
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"txnNumber",
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event.command,
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f"{msg} sent txnNumber with {event.command_name}",
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)
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def test_supported_single_statement_unsupported_cluster(self):
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if client_context.is_rs or client_context.is_mongos:
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raise SkipTest("This cluster supports retryable writes")
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for method, args, kwargs in retryable_single_statement_ops(self.db.retryable_write_test):
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msg = f"{method.__name__}(*{args!r}, **{kwargs!r})"
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self.listener.reset()
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method(*args, **kwargs)
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for event in self.listener.started_events:
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self.assertNotIn(
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"txnNumber",
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event.command,
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f"{msg} sent txnNumber with {event.command_name}",
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)
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def test_unsupported_single_statement(self):
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coll = self.db.retryable_write_test
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coll.insert_many([{}, {}])
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coll_w0 = coll.with_options(write_concern=WriteConcern(w=0))
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for method, args, kwargs in non_retryable_single_statement_ops(
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coll
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) + retryable_single_statement_ops(coll_w0):
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msg = f"{method.__name__}(*{args!r}, **{kwargs!r})"
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self.listener.reset()
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method(*args, **kwargs)
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started_events = self.listener.started_events
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self.assertEqual(len(self.listener.succeeded_events), len(started_events), msg)
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self.assertEqual(len(self.listener.failed_events), 0, msg)
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for event in started_events:
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self.assertNotIn(
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"txnNumber",
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event.command,
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f"{msg} sent txnNumber with {event.command_name}",
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)
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def test_server_selection_timeout_not_retried(self):
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"""A ServerSelectionTimeoutError is not retried."""
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listener = OvertCommandListener()
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client = self.simple_client(
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"somedomainthatdoesntexist.org",
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serverSelectionTimeoutMS=1,
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retryWrites=True,
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event_listeners=[listener],
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)
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for method, args, kwargs in retryable_single_statement_ops(client.db.retryable_write_test):
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msg = f"{method.__name__}(*{args!r}, **{kwargs!r})"
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listener.reset()
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with self.assertRaises(ServerSelectionTimeoutError, msg=msg):
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method(*args, **kwargs)
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self.assertEqual(len(listener.started_events), 0, msg)
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@client_context.require_replica_set
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@client_context.require_test_commands
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def test_retry_timeout_raises_original_error(self):
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"""A ServerSelectionTimeoutError on the retry attempt raises the
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original error.
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"""
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listener = OvertCommandListener()
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client = self.rs_or_single_client(retryWrites=True, event_listeners=[listener])
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topology = client._topology
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select_server = topology.select_server
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def mock_select_server(*args, **kwargs):
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server = select_server(*args, **kwargs)
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def raise_error(*args, **kwargs):
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raise ServerSelectionTimeoutError("No primary available for writes")
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# Raise ServerSelectionTimeout on the retry attempt.
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topology.select_server = raise_error
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return server
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for method, args, kwargs in retryable_single_statement_ops(client.db.retryable_write_test):
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msg = f"{method.__name__}(*{args!r}, **{kwargs!r})"
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listener.reset()
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topology.select_server = mock_select_server
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with self.assertRaises(ConnectionFailure, msg=msg):
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method(*args, **kwargs)
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self.assertEqual(len(listener.started_events), 1, msg)
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@client_context.require_replica_set
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@client_context.require_test_commands
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def test_batch_splitting(self):
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"""Test retry succeeds after failures during batch splitting."""
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large = "s" * 1024 * 1024 * 15
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coll = self.db.retryable_write_test
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coll.delete_many({})
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self.listener.reset()
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bulk_result = coll.bulk_write(
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[
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InsertOne({"_id": 1, "l": large}),
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InsertOne({"_id": 2, "l": large}),
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InsertOne({"_id": 3, "l": large}),
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UpdateOne({"_id": 1, "l": large}, {"$unset": {"l": 1}, "$inc": {"count": 1}}),
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UpdateOne({"_id": 2, "l": large}, {"$set": {"foo": "bar"}}),
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DeleteOne({"l": large}),
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DeleteOne({"l": large}),
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]
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)
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# Each command should fail and be retried.
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# With OP_MSG 3 inserts are one batch. 2 updates another.
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# 2 deletes a third.
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self.assertEqual(len(self.listener.started_events), 6)
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self.assertEqual(coll.find_one(), {"_id": 1, "count": 1})
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# Assert the final result
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expected_result = {
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"writeErrors": [],
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"writeConcernErrors": [],
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"nInserted": 3,
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"nUpserted": 0,
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"nMatched": 2,
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"nModified": 2,
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"nRemoved": 2,
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"upserted": [],
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}
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self.assertEqual(bulk_result.bulk_api_result, expected_result)
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@client_context.require_replica_set
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@client_context.require_test_commands
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def test_batch_splitting_retry_fails(self):
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"""Test retry fails during batch splitting."""
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large = "s" * 1024 * 1024 * 15
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coll = self.db.retryable_write_test
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coll.delete_many({})
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self.client.admin.command(
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SON(
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[
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("configureFailPoint", "onPrimaryTransactionalWrite"),
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("mode", {"skip": 3}), # The number of _documents_ to skip.
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("data", {"failBeforeCommitExceptionCode": 1}),
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]
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)
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)
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self.listener.reset()
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with self.client.start_session() as session:
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initial_txn = session._transaction_id
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try:
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coll.bulk_write(
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[
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InsertOne({"_id": 1, "l": large}),
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InsertOne({"_id": 2, "l": large}),
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InsertOne({"_id": 3, "l": large}),
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InsertOne({"_id": 4, "l": large}),
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],
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session=session,
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)
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except ConnectionFailure:
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pass
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else:
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self.fail("bulk_write should have failed")
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started = self.listener.started_events
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self.assertEqual(len(started), 3)
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self.assertEqual(len(self.listener.succeeded_events), 1)
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expected_txn = Int64(initial_txn + 1)
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self.assertEqual(started[0].command["txnNumber"], expected_txn)
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self.assertEqual(started[0].command["lsid"], session.session_id)
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expected_txn = Int64(initial_txn + 2)
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self.assertEqual(started[1].command["txnNumber"], expected_txn)
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self.assertEqual(started[1].command["lsid"], session.session_id)
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started[1].command.pop("$clusterTime")
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started[2].command.pop("$clusterTime")
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self.assertEqual(started[1].command, started[2].command)
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final_txn = session._transaction_id
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self.assertEqual(final_txn, expected_txn)
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self.assertEqual(coll.find_one(projection={"_id": True}), {"_id": 1})
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@client_context.require_multiple_mongoses
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@client_context.require_failCommand_fail_point
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def test_retryable_writes_in_sharded_cluster_multiple_available(self):
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fail_command = {
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"configureFailPoint": "failCommand",
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"mode": {"times": 1},
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"data": {
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"failCommands": ["insert"],
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"closeConnection": True,
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"appName": "retryableWriteTest",
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},
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}
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mongos_clients = []
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for mongos in client_context.mongos_seeds().split(","):
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client = self.rs_or_single_client(mongos)
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set_fail_point(client, fail_command)
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mongos_clients.append(client)
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listener = OvertCommandListener()
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client = self.rs_or_single_client(
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client_context.mongos_seeds(),
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appName="retryableWriteTest",
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event_listeners=[listener],
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retryWrites=True,
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)
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with self.assertRaises(AutoReconnect):
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client.t.t.insert_one({"x": 1})
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# Disable failpoints on each mongos
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for client in mongos_clients:
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fail_command["mode"] = "off"
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set_fail_point(client, fail_command)
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self.assertEqual(len(listener.failed_events), 2)
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self.assertEqual(len(listener.succeeded_events), 0)
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class TestWriteConcernError(IntegrationTest):
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RUN_ON_LOAD_BALANCER = True
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RUN_ON_SERVERLESS = True
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fail_insert: dict
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@client_context.require_replica_set
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@client_context.require_no_mmap
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@client_context.require_failCommand_fail_point
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def setUp(self) -> None:
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super().setUp()
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self.fail_insert = {
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"configureFailPoint": "failCommand",
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"mode": {"times": 2},
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"data": {
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"failCommands": ["insert"],
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"writeConcernError": {"code": 91, "errmsg": "Replication is being shut down"},
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},
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}
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@client_context.require_version_min(4, 0)
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@client_knobs(heartbeat_frequency=0.05, min_heartbeat_interval=0.05)
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def test_RetryableWriteError_error_label(self):
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listener = OvertCommandListener()
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client = self.rs_or_single_client(retryWrites=True, event_listeners=[listener])
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# Ensure collection exists.
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client.pymongo_test.testcoll.insert_one({})
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with self.fail_point(self.fail_insert):
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with self.assertRaises(WriteConcernError) as cm:
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client.pymongo_test.testcoll.insert_one({})
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self.assertTrue(cm.exception.has_error_label("RetryableWriteError"))
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if client_context.version >= Version(4, 4):
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# In MongoDB 4.4+ we rely on the server returning the error label.
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self.assertIn("RetryableWriteError", listener.succeeded_events[-1].reply["errorLabels"])
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@client_context.require_version_min(4, 4)
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def test_RetryableWriteError_error_label_RawBSONDocument(self):
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# using RawBSONDocument should not cause errorLabel parsing to fail
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with self.fail_point(self.fail_insert):
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with self.client.start_session() as s:
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s._start_retryable_write()
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result = self.client.pymongo_test.command(
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"insert",
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"testcoll",
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documents=[{"_id": 1}],
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txnNumber=s._transaction_id,
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session=s,
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codec_options=DEFAULT_CODEC_OPTIONS.with_options(
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document_class=RawBSONDocument
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),
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)
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self.assertIn("writeConcernError", result)
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self.assertIn("RetryableWriteError", result["errorLabels"])
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class InsertThread(threading.Thread):
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def __init__(self, collection):
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super().__init__()
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self.daemon = True
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self.collection = collection
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self.passed = False
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def run(self):
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self.collection.insert_one({})
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self.passed = True
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class TestPoolPausedError(IntegrationTest):
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# Pools don't get paused in load balanced mode.
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|
RUN_ON_LOAD_BALANCER = False
|
|
RUN_ON_SERVERLESS = False
|
|
|
|
@client_context.require_sync
|
|
@client_context.require_failCommand_blockConnection
|
|
@client_context.require_retryable_writes
|
|
@client_knobs(heartbeat_frequency=0.05, min_heartbeat_interval=0.05)
|
|
def test_pool_paused_error_is_retryable(self):
|
|
cmap_listener = CMAPListener()
|
|
cmd_listener = OvertCommandListener()
|
|
client = self.rs_or_single_client(
|
|
maxPoolSize=1, event_listeners=[cmap_listener, cmd_listener]
|
|
)
|
|
for _ in range(10):
|
|
cmap_listener.reset()
|
|
cmd_listener.reset()
|
|
threads = [InsertThread(client.pymongo_test.test) for _ in range(2)]
|
|
fail_command = {
|
|
"mode": {"times": 1},
|
|
"data": {
|
|
"failCommands": ["insert"],
|
|
"blockConnection": True,
|
|
"blockTimeMS": 1000,
|
|
"errorCode": 91,
|
|
"errorLabels": ["RetryableWriteError"],
|
|
},
|
|
}
|
|
with self.fail_point(fail_command):
|
|
for thread in threads:
|
|
thread.start()
|
|
for thread in threads:
|
|
thread.join()
|
|
for thread in threads:
|
|
self.assertTrue(thread.passed)
|
|
# It's possible that SDAM can rediscover the server and mark the
|
|
# pool ready before the thread in the wait queue has a chance
|
|
# to run. Repeat the test until the thread actually encounters
|
|
# a PoolClearedError.
|
|
if cmap_listener.event_count(ConnectionCheckOutFailedEvent):
|
|
break
|
|
|
|
# Via CMAP monitoring, assert that the first check out succeeds.
|
|
cmap_events = cmap_listener.events_by_type(
|
|
(ConnectionCheckedOutEvent, ConnectionCheckOutFailedEvent, PoolClearedEvent)
|
|
)
|
|
msg = pprint.pformat(cmap_listener.events)
|
|
self.assertIsInstance(cmap_events[0], ConnectionCheckedOutEvent, msg)
|
|
self.assertIsInstance(cmap_events[1], PoolClearedEvent, msg)
|
|
self.assertIsInstance(cmap_events[2], ConnectionCheckOutFailedEvent, msg)
|
|
self.assertEqual(cmap_events[2].reason, ConnectionCheckOutFailedReason.CONN_ERROR, msg)
|
|
self.assertIsInstance(cmap_events[3], ConnectionCheckedOutEvent, msg)
|
|
|
|
# Connection check out failures are not reflected in command
|
|
# monitoring because we only publish command events _after_ checking
|
|
# out a connection.
|
|
started = cmd_listener.started_events
|
|
msg = pprint.pformat(cmd_listener.results)
|
|
self.assertEqual(3, len(started), msg)
|
|
succeeded = cmd_listener.succeeded_events
|
|
self.assertEqual(2, len(succeeded), msg)
|
|
failed = cmd_listener.failed_events
|
|
self.assertEqual(1, len(failed), msg)
|
|
|
|
@client_context.require_sync
|
|
@client_context.require_failCommand_fail_point
|
|
@client_context.require_replica_set
|
|
@client_context.require_version_min(
|
|
6, 0, 0
|
|
) # the spec requires that this prose test only be run on 6.0+
|
|
@client_knobs(heartbeat_frequency=0.05, min_heartbeat_interval=0.05)
|
|
def test_returns_original_error_code(
|
|
self,
|
|
):
|
|
cmd_listener = InsertEventListener()
|
|
client = self.rs_or_single_client(retryWrites=True, event_listeners=[cmd_listener])
|
|
client.test.test.drop()
|
|
cmd_listener.reset()
|
|
client.admin.command(
|
|
{
|
|
"configureFailPoint": "failCommand",
|
|
"mode": {"times": 1},
|
|
"data": {
|
|
"writeConcernError": {
|
|
"code": 91,
|
|
"errorLabels": ["RetryableWriteError"],
|
|
},
|
|
"failCommands": ["insert"],
|
|
},
|
|
}
|
|
)
|
|
with self.assertRaises(WriteConcernError) as exc:
|
|
client.test.test.insert_one({"_id": 1})
|
|
self.assertEqual(exc.exception.code, 91)
|
|
client.admin.command(
|
|
{
|
|
"configureFailPoint": "failCommand",
|
|
"mode": "off",
|
|
}
|
|
)
|
|
|
|
|
|
# TODO: Make this a real integration test where we stepdown the primary.
|
|
class TestRetryableWritesTxnNumber(IgnoreDeprecationsTest):
|
|
@client_context.require_replica_set
|
|
@client_context.require_no_mmap
|
|
def test_increment_transaction_id_without_sending_command(self):
|
|
"""Test that the txnNumber field is properly incremented, even when
|
|
the first attempt fails before sending the command.
|
|
"""
|
|
listener = OvertCommandListener()
|
|
client = self.rs_or_single_client(retryWrites=True, event_listeners=[listener])
|
|
topology = client._topology
|
|
select_server = topology.select_server
|
|
|
|
def raise_connection_err_select_server(*args, **kwargs):
|
|
# Raise ConnectionFailure on the first attempt and perform
|
|
# normal selection on the retry attempt.
|
|
topology.select_server = select_server
|
|
raise ConnectionFailure("Connection refused")
|
|
|
|
for method, args, kwargs in retryable_single_statement_ops(client.db.retryable_write_test):
|
|
listener.reset()
|
|
topology.select_server = raise_connection_err_select_server
|
|
with client.start_session() as session:
|
|
kwargs = copy.deepcopy(kwargs)
|
|
kwargs["session"] = session
|
|
msg = f"{method.__name__}(*{args!r}, **{kwargs!r})"
|
|
initial_txn_id = session._transaction_id
|
|
|
|
# Each operation should fail on the first attempt and succeed
|
|
# on the second.
|
|
method(*args, **kwargs)
|
|
self.assertEqual(len(listener.started_events), 1, msg)
|
|
retry_cmd = listener.started_events[0].command
|
|
sent_txn_id = retry_cmd["txnNumber"]
|
|
final_txn_id = session._transaction_id
|
|
self.assertEqual(Int64(initial_txn_id + 1), sent_txn_id, msg)
|
|
self.assertEqual(sent_txn_id, final_txn_id, msg)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|