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fix comment

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This commit is contained in:
Matthew Hodgson 2017-01-05 11:44:44 +00:00
parent 555d702e34
commit 8e82611f37
1 changed files with 17 additions and 1 deletions
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18
synapse/federation/federation_server.py
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@ -569,7 +569,23 @@ class FederationServer(FederationBase):
)
# XXX: we set timeout to 10s to help workaround
# https://github.com/matrix-org/synapse/issues/1733
# https://github.com/matrix-org/synapse/issues/1733.
# The reason is to avoid holding the linearizer lock
# whilst processing inbound /send transactions, causing
# FDs to stack up and block other inbound transactions
# which empirically can currently take up to 30 minutes.
#
# N.B. this explicitly disables retry attempts.
#
# N.B. this also increases our chances of falling back to
# fetching fresh state for the room if the missing event
# can't be found, which slightly reduces our security.
# it may also increase our DAG extremity count for the room,
# causing additional state resolution? See #1760.
# However, fetching state doesn't hold the linearizer lock
# apparently.
#
# see https://github.com/matrix-org/synapse/pull/1744
missing_events = yield self.get_missing_events(
origin,