From 0aff09f6c93193c2f3000e1e70e713f615445fe9 Mon Sep 17 00:00:00 2001
From: Mark Haines <mark.haines@matrix.org>
Date: Fri, 30 Dec 2016 20:00:44 +0000
Subject: Add more useful logging when we block fetching events

---
 synapse/util/async.py | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'synapse/util')

diff --git a/synapse/util/async.py b/synapse/util/async.py
index 16ed183d4c..1e124163fa 100644
--- a/synapse/util/async.py
+++ b/synapse/util/async.py
@@ -23,6 +23,10 @@ from synapse.util import unwrapFirstError
 
 from contextlib import contextmanager
 
+import logging
+
+logger = logging.getLogger(__name__)
+
 
 @defer.inlineCallbacks
 def sleep(seconds):
@@ -181,6 +185,7 @@ class Linearizer(object):
         self.key_to_defer[key] = new_defer
 
         if current_defer:
+            logger.info("Waiting to aquire linearizer lock for key %r", key)
             with PreserveLoggingContext():
                 yield current_defer
 
-- 
cgit 1.5.1