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Don't go into federation catch up mode so easily (#9561)

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Federation catch up mode is very inefficient if the number of events
that the remote server has missed is small, since handling gaps can be
very expensive, c.f. #9492.

Instead of going into catch up mode whenever we see an error, we instead
do so only if we've backed off from trying the remote for more than an
hour (the assumption being that in such a case it is more than a
transient failure).
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Erik Johnston 2021-03-15 14:42:40 +00:00 • committed by GitHub
parent af2248f8bf
commit 026503fa3b
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5 changed files with 189 additions and 158 deletions
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tests/federation/test_federation_catch_up.py
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@ -7,6 +7,7 @@ from synapse.federation.sender import PerDestinationQueue, TransactionManager
from synapse.federation.units import Edu
from synapse.rest import admin
from synapse.rest.client.v1 import login, room
from synapse.util.retryutils import NotRetryingDestination
from tests.test_utils import event_injection, make_awaitable
from tests.unittest import FederatingHomeserverTestCase, override_config
@ -49,7 +50,7 @@ class FederationCatchUpTestCases(FederatingHomeserverTestCase):
else:
data = json_cb()
self.failed_pdus.extend(data["pdus"])
raise IOError("Failed to connect because this is a test!")
raise NotRetryingDestination(0, 24 * 60 * 60 * 1000, txn.destination)
def get_destination_room(self, room: str, destination: str = "host2") -> dict:
"""