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Advance replication streams even if nothing is listening

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Otherwise the streams don't advance and steadily fall behind, so when a
worker does connect either a) they'll be streamed lots of old updates or
b) the connection will fail as the streams are too far behind.
This commit is contained in:
Erik Johnston 2017-04-04 13:19:26 +01:00
parent 27cc627e42
commit 023ee197be
3 changed files with 15 additions and 6 deletions
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12
synapse/replication/tcp/protocol.py
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@ -414,16 +414,18 @@ class ServerReplicationStreamProtocol(BaseReplicationStreamProtocol):
token, row = update[0], update[1]
self.send_command(RdataCommand(stream_name, token, row))
# Now we can send any updates that came in while we were subscribing
pending_rdata = self.pending_rdata.pop(stream_name, [])
for token, update in pending_rdata:
self.send_command(RdataCommand(stream_name, token, update))
# We send a POSITION command to ensure that they have an up to
# date token (especially useful if we didn't send any updates
# above)
self.send_command(PositionCommand(stream_name, current_token))
# Now we can send any updates that came in while we were subscribing
pending_rdata = self.pending_rdata.pop(stream_name, [])
for token, update in pending_rdata:
# Only send updates newer than the current token
if token > current_token:
self.send_command(RdataCommand(stream_name, token, update))
# They're now fully subscribed
self.replication_streams.add(stream_name)
except Exception as e: