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Fix race in replication (#7226)

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Fixes a race between handling `POSITION` and `RDATA` commands. We do this by simply linearizing handling of them.
This commit is contained in:
Erik Johnston 2020-04-07 11:01:04 +01:00 • committed by GitHub
parent 82498ee901
commit ce72355d7f
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 68 additions and 49 deletions
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40
synapse/storage/data_stores/main/push_rule.py
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@ -334,6 +334,26 @@ class PushRulesWorkerStore(
results.setdefault(row["user_name"], {})[row["rule_id"]] = enabled
return results
def get_all_push_rule_updates(self, last_id, current_id, limit):
"""Get all the push rules changes that have happend on the server"""
if last_id == current_id:
return defer.succeed([])
def get_all_push_rule_updates_txn(txn):
sql = (
"SELECT stream_id, event_stream_ordering, user_id, rule_id,"
" op, priority_class, priority, conditions, actions"
" FROM push_rules_stream"
" WHERE ? < stream_id AND stream_id <= ?"
" ORDER BY stream_id ASC LIMIT ?"
)
txn.execute(sql, (last_id, current_id, limit))
return txn.fetchall()
return self.db.runInteraction(
"get_all_push_rule_updates", get_all_push_rule_updates_txn
)
class PushRuleStore(PushRulesWorkerStore):
@defer.inlineCallbacks
@ -685,26 +705,6 @@ class PushRuleStore(PushRulesWorkerStore):
self.push_rules_stream_cache.entity_has_changed, user_id, stream_id
)
def get_all_push_rule_updates(self, last_id, current_id, limit):
"""Get all the push rules changes that have happend on the server"""
if last_id == current_id:
return defer.succeed([])
def get_all_push_rule_updates_txn(txn):
sql = (
"SELECT stream_id, event_stream_ordering, user_id, rule_id,"
" op, priority_class, priority, conditions, actions"
" FROM push_rules_stream"
" WHERE ? < stream_id AND stream_id <= ?"
" ORDER BY stream_id ASC LIMIT ?"
)
txn.execute(sql, (last_id, current_id, limit))
return txn.fetchall()
return self.db.runInteraction(
"get_all_push_rule_updates", get_all_push_rule_updates_txn
)
def get_push_rules_stream_token(self):
"""Get the position of the push rules stream.
Returns a pair of a stream id for the push_rules stream and the