diff options
Diffstat (limited to '')
| -rw-r--r-- | synapse/federation/sender/__init__.py | 62 |
1 files changed, 60 insertions, 2 deletions
diff --git a/synapse/federation/sender/__init__.py b/synapse/federation/sender/__init__.py index 552519e82c..8bb17b3a05 100644 --- a/synapse/federation/sender/__init__.py +++ b/synapse/federation/sender/__init__.py @@ -55,6 +55,15 @@ sent_pdus_destination_dist_total = Counter( "Total number of PDUs queued for sending across all destinations", ) +# Time (in s) after Synapse's startup that we will begin to wake up destinations +# that have catch-up outstanding. +CATCH_UP_STARTUP_DELAY_SEC = 15 + +# Time (in s) to wait in between waking up each destination, i.e. one destination +# will be woken up every <x> seconds after Synapse's startup until we have woken +# every destination has outstanding catch-up. +CATCH_UP_STARTUP_INTERVAL_SEC = 5 + class FederationSender: def __init__(self, hs: "synapse.server.HomeServer"): @@ -125,6 +134,14 @@ class FederationSender: 1000.0 / hs.config.federation_rr_transactions_per_room_per_second ) + # wake up destinations that have outstanding PDUs to be caught up + self._catchup_after_startup_timer = self.clock.call_later( + CATCH_UP_STARTUP_DELAY_SEC, + run_as_background_process, + "wake_destinations_needing_catchup", + self._wake_destinations_needing_catchup, + ) + def _get_per_destination_queue(self, destination: str) -> PerDestinationQueue: """Get or create a PerDestinationQueue for the given destination @@ -209,7 +226,7 @@ class FederationSender: logger.debug("Sending %s to %r", event, destinations) if destinations: - self._send_pdu(event, destinations) + await self._send_pdu(event, destinations) now = self.clock.time_msec() ts = await self.store.get_received_ts(event.event_id) @@ -265,7 +282,7 @@ class FederationSender: finally: self._is_processing = False - def _send_pdu(self, pdu: EventBase, destinations: Iterable[str]) -> None: + async def _send_pdu(self, pdu: EventBase, destinations: Iterable[str]) -> None: # We loop through all destinations to see whether we already have # a transaction in progress. If we do, stick it in the pending_pdus # table and we'll get back to it later. @@ -280,6 +297,13 @@ class FederationSender: sent_pdus_destination_dist_total.inc(len(destinations)) sent_pdus_destination_dist_count.inc() + # track the fact that we have a PDU for these destinations, + # to allow us to perform catch-up later on if the remote is unreachable + # for a while. + await self.store.store_destination_rooms_entries( + destinations, pdu.room_id, pdu.internal_metadata.stream_ordering, + ) + for destination in destinations: self._get_per_destination_queue(destination).send_pdu(pdu) @@ -553,3 +577,37 @@ class FederationSender: # Dummy implementation for case where federation sender isn't offloaded # to a worker. return [], 0, False + + async def _wake_destinations_needing_catchup(self): + """ + Wakes up destinations that need catch-up and are not currently being + backed off from. + + In order to reduce load spikes, adds a delay between each destination. + """ + + last_processed = None # type: Optional[str] + + while True: + destinations_to_wake = await self.store.get_catch_up_outstanding_destinations( + last_processed + ) + + if not destinations_to_wake: + # finished waking all destinations! + self._catchup_after_startup_timer = None + break + + destinations_to_wake = [ + d + for d in destinations_to_wake + if self._federation_shard_config.should_handle(self._instance_name, d) + ] + + for last_processed in destinations_to_wake: + logger.info( + "Destination %s has outstanding catch-up, waking up.", + last_processed, + ) + self.wake_destination(last_processed) + await self.clock.sleep(CATCH_UP_STARTUP_INTERVAL_SEC) |