diff options
Diffstat (limited to 'synapse/replication/tcp/resource.py')
| -rw-r--r-- | synapse/replication/tcp/resource.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/synapse/replication/tcp/resource.py b/synapse/replication/tcp/resource.py index c6870df8f9..99f09669f0 100644 --- a/synapse/replication/tcp/resource.py +++ b/synapse/replication/tcp/resource.py @@ -204,6 +204,15 @@ class ReplicationStreamer: # turns out that e.g. account data streams share # their "current token" with each other, meaning # that it is *not* safe to send a POSITION. + + # Note: `last_token` may not *actually* be the + # last token we sent out in a RDATA or POSITION. + # This can happen if we sent out an RDATA for + # position X when our current token was say X+1. + # Other workers will see RDATA for X and then a + # POSITION with last token of X+1, which will + # cause them to check if there were any missing + # updates between X and X+1. logger.info( "Sending position: %s -> %s", stream.NAME, |