From eed59dcc1efdda95ea2deaad6dd8b70e5d346a6e Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Fri, 9 Jun 2017 11:39:35 +0100 Subject: [PATCH] Fix has_any_entity_changed Occaisonally has_any_entity_changed would throw the error: "Set changed size during iteration" when taking the max of the `sorteddict`. While its uncertain how that happens, its quite inefficient to iterate over the entire dict anyway so we change to using the more traditional `bisect_*` functions. --- synapse/util/caches/stream_change_cache.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/synapse/util/caches/stream_change_cache.py b/synapse/util/caches/stream_change_cache.py index c498aee46c..b723e33641 100644 --- a/synapse/util/caches/stream_change_cache.py +++ b/synapse/util/caches/stream_change_cache.py @@ -96,10 +96,10 @@ class StreamChangeCache(object): if stream_pos >= self._earliest_known_stream_pos: self.metrics.inc_hits() - if stream_pos >= max(self._cache): - return False - else: - return True + keys = self._cache.keys() + i = keys.bisect_right(stream_pos) + + return len(keys[i:]) > 0 else: self.metrics.inc_misses() return True