diff options
Diffstat (limited to '')
| -rw-r--r-- | changelog.d/4061.bugfix | 1 | ||||
| -rw-r--r-- | synapse/http/request_metrics.py | 31 | ||||
| -rw-r--r-- | synapse/notifier.py | 6 |
3 files changed, 22 insertions, 16 deletions
diff --git a/changelog.d/4061.bugfix b/changelog.d/4061.bugfix new file mode 100644 index 0000000000..94ffcf7a51 --- /dev/null +++ b/changelog.d/4061.bugfix @@ -0,0 +1 @@ +Fix some metrics being racy and causing exceptions when polled by Prometheus. diff --git a/synapse/http/request_metrics.py b/synapse/http/request_metrics.py index fedb4e6b18..62045a918b 100644 --- a/synapse/http/request_metrics.py +++ b/synapse/http/request_metrics.py @@ -39,7 +39,8 @@ outgoing_responses_counter = Counter( ) response_timer = Histogram( - "synapse_http_server_response_time_seconds", "sec", + "synapse_http_server_response_time_seconds", + "sec", ["method", "servlet", "tag", "code"], ) @@ -79,15 +80,11 @@ response_size = Counter( # than when the response was written. in_flight_requests_ru_utime = Counter( - "synapse_http_server_in_flight_requests_ru_utime_seconds", - "", - ["method", "servlet"], + "synapse_http_server_in_flight_requests_ru_utime_seconds", "", ["method", "servlet"] ) in_flight_requests_ru_stime = Counter( - "synapse_http_server_in_flight_requests_ru_stime_seconds", - "", - ["method", "servlet"], + "synapse_http_server_in_flight_requests_ru_stime_seconds", "", ["method", "servlet"] ) in_flight_requests_db_txn_count = Counter( @@ -134,7 +131,7 @@ def _get_in_flight_counts(): # type counts = {} for rm in reqs: - key = (rm.method, rm.name,) + key = (rm.method, rm.name) counts[key] = counts.get(key, 0) + 1 return counts @@ -175,7 +172,8 @@ class RequestMetrics(object): if context != self.start_context: logger.warn( "Context have unexpectedly changed %r, %r", - context, self.start_context + context, + self.start_context, ) return @@ -192,10 +190,10 @@ class RequestMetrics(object): resource_usage = context.get_resource_usage() response_ru_utime.labels(self.method, self.name, tag).inc( - resource_usage.ru_utime, + resource_usage.ru_utime ) response_ru_stime.labels(self.method, self.name, tag).inc( - resource_usage.ru_stime, + resource_usage.ru_stime ) response_db_txn_count.labels(self.method, self.name, tag).inc( resource_usage.db_txn_count @@ -222,8 +220,15 @@ class RequestMetrics(object): diff = new_stats - self._request_stats self._request_stats = new_stats - in_flight_requests_ru_utime.labels(self.method, self.name).inc(diff.ru_utime) - in_flight_requests_ru_stime.labels(self.method, self.name).inc(diff.ru_stime) + # max() is used since rapid use of ru_stime/ru_utime can end up with the + # count going backwards due to NTP, time smearing, fine-grained + # correction, or floating points. Who knows, really? + in_flight_requests_ru_utime.labels(self.method, self.name).inc( + max(diff.ru_utime, 0) + ) + in_flight_requests_ru_stime.labels(self.method, self.name).inc( + max(diff.ru_stime, 0) + ) in_flight_requests_db_txn_count.labels(self.method, self.name).inc( diff.db_txn_count diff --git a/synapse/notifier.py b/synapse/notifier.py index 340b16ce25..de02b1017e 100644 --- a/synapse/notifier.py +++ b/synapse/notifier.py @@ -186,9 +186,9 @@ class Notifier(object): def count_listeners(): all_user_streams = set() - for x in self.room_to_user_streams.values(): + for x in list(self.room_to_user_streams.values()): all_user_streams |= x - for x in self.user_to_user_stream.values(): + for x in list(self.user_to_user_stream.values()): all_user_streams.add(x) return sum(stream.count_listeners() for stream in all_user_streams) @@ -196,7 +196,7 @@ class Notifier(object): LaterGauge( "synapse_notifier_rooms", "", [], - lambda: count(bool, self.room_to_user_streams.values()), + lambda: count(bool, list(self.room_to_user_streams.values())), ) LaterGauge( "synapse_notifier_users", "", [], |