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Fix federation stall on concurrent access errors (#9639)

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Jonathan de Jong 2021-03-23 14:52:30 +01:00 committed by GitHub
parent 4ecba9bd5c
commit 0caf2a338e
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2 changed files with 10 additions and 36 deletions
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1
changelog.d/9639.bugfix Normal file
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@ -0,0 +1 @@
Fix bug where federation sending can stall due to `concurrent access` database exceptions when it falls behind.

45
synapse/storage/databases/main/transactions.py
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@ -22,7 +22,6 @@ from canonicaljson import encode_canonical_json
from synapse.metrics.background_process_metrics import wrap_as_background_process from synapse.metrics.background_process_metrics import wrap_as_background_process
from synapse.storage._base import SQLBaseStore, db_to_json from synapse.storage._base import SQLBaseStore, db_to_json
from synapse.storage.database import DatabasePool, LoggingTransaction from synapse.storage.database import DatabasePool, LoggingTransaction
from synapse.storage.engines import PostgresEngine, Sqlite3Engine
from synapse.types import JsonDict from synapse.types import JsonDict
from synapse.util.caches.expiringcache import ExpiringCache from synapse.util.caches.expiringcache import ExpiringCache
@ -312,49 +311,23 @@ class TransactionStore(TransactionWorkerStore):
stream_ordering: the stream_ordering of the event stream_ordering: the stream_ordering of the event
""" """
return await self.db_pool.runInteraction( await self.db_pool.simple_upsert_many(
"store_destination_rooms_entries", table="destinations",
self._store_destination_rooms_entries_txn, key_names=("destination",),
destinations, key_values=[(d,) for d in destinations],
room_id, value_names=[],
stream_ordering, value_values=[],
desc="store_destination_rooms_entries_dests",
) )
def _store_destination_rooms_entries_txn(
self,
txn: LoggingTransaction,
destinations: Iterable[str],
room_id: str,
stream_ordering: int,
) -> None:
# ensure we have a `destinations` row for this destination, as there is
# a foreign key constraint.
if isinstance(self.database_engine, PostgresEngine):
q = """
INSERT INTO destinations (destination)
VALUES (?)
ON CONFLICT DO NOTHING;
"""
elif isinstance(self.database_engine, Sqlite3Engine):
q = """
INSERT OR IGNORE INTO destinations (destination)
VALUES (?);
"""
else:
raise RuntimeError("Unknown database engine")
txn.execute_batch(q, ((destination,) for destination in destinations))
rows = [(destination, room_id) for destination in destinations] rows = [(destination, room_id) for destination in destinations]
await self.db_pool.simple_upsert_many(
self.db_pool.simple_upsert_many_txn(
txn,
table="destination_rooms", table="destination_rooms",
key_names=("destination", "room_id"), key_names=("destination", "room_id"),
key_values=rows, key_values=rows,
value_names=["stream_ordering"], value_names=["stream_ordering"],
value_values=[(stream_ordering,)] * len(rows), value_values=[(stream_ordering,)] * len(rows),
desc="store_destination_rooms_entries_rooms",
) )
async def get_destination_last_successful_stream_ordering( async def get_destination_last_successful_stream_ordering(