diff options
| -rw-r--r-- | changelog.d/10984.misc | 1 | ||||
| -rw-r--r-- | synapse/replication/tcp/protocol.py | 18 | ||||
| -rw-r--r-- | synapse/replication/tcp/redis.py | 18 |
3 files changed, 27 insertions, 10 deletions
diff --git a/changelog.d/10984.misc b/changelog.d/10984.misc new file mode 100644 index 0000000000..86c4081cc4 --- /dev/null +++ b/changelog.d/10984.misc @@ -0,0 +1 @@ +Fix spurious warnings about losing the logging context on the `ReplicationCommandHandler` when losing the replication connection. diff --git a/synapse/replication/tcp/protocol.py b/synapse/replication/tcp/protocol.py index 8c80153ab6..7bae36db16 100644 --- a/synapse/replication/tcp/protocol.py +++ b/synapse/replication/tcp/protocol.py @@ -182,9 +182,13 @@ class BaseReplicationStreamProtocol(LineOnlyReceiver): # a logcontext which we use for processing incoming commands. We declare it as a # background process so that the CPU stats get reported to prometheus. - self._logging_context = BackgroundProcessLoggingContext( - "replication-conn", self.conn_id - ) + with PreserveLoggingContext(): + # thanks to `PreserveLoggingContext()`, the new logcontext is guaranteed to + # capture the sentinel context as its containing context and won't prevent + # GC of / unintentionally reactivate what would be the current context. + self._logging_context = BackgroundProcessLoggingContext( + "replication-conn", self.conn_id + ) def connectionMade(self): logger.info("[%s] Connection established", self.id()) @@ -434,8 +438,12 @@ class BaseReplicationStreamProtocol(LineOnlyReceiver): if self.transport: self.transport.unregisterProducer() - # mark the logging context as finished - self._logging_context.__exit__(None, None, None) + # mark the logging context as finished by triggering `__exit__()` + with PreserveLoggingContext(): + with self._logging_context: + pass + # the sentinel context is now active, which may not be correct. + # PreserveLoggingContext() will restore the correct logging context. def __str__(self): addr = None diff --git a/synapse/replication/tcp/redis.py b/synapse/replication/tcp/redis.py index 062fe2f33e..8d28bd3f3f 100644 --- a/synapse/replication/tcp/redis.py +++ b/synapse/replication/tcp/redis.py @@ -100,9 +100,13 @@ class RedisSubscriber(txredisapi.SubscriberProtocol): # a logcontext which we use for processing incoming commands. We declare it as a # background process so that the CPU stats get reported to prometheus. - self._logging_context = BackgroundProcessLoggingContext( - "replication_command_handler" - ) + with PreserveLoggingContext(): + # thanks to `PreserveLoggingContext()`, the new logcontext is guaranteed to + # capture the sentinel context as its containing context and won't prevent + # GC of / unintentionally reactivate what would be the current context. + self._logging_context = BackgroundProcessLoggingContext( + "replication_command_handler" + ) def connectionMade(self): logger.info("Connected to redis") @@ -182,8 +186,12 @@ class RedisSubscriber(txredisapi.SubscriberProtocol): super().connectionLost(reason) self.synapse_handler.lost_connection(self) - # mark the logging context as finished - self._logging_context.__exit__(None, None, None) + # mark the logging context as finished by triggering `__exit__()` + with PreserveLoggingContext(): + with self._logging_context: + pass + # the sentinel context is now active, which may not be correct. + # PreserveLoggingContext() will restore the correct logging context. def send_command(self, cmd: Command): """Send a command if connection has been established. |