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authorMark Haines <mark.haines@matrix.org>2016-12-30 20:00:44 +0000
committerMark Haines <mark.haines@matrix.org>2016-12-30 20:00:44 +0000
commit0aff09f6c93193c2f3000e1e70e713f615445fe9 (patch)
treef4d5ad6fe65e70fb184b88cccd001708232e3d60 /synapse/util/async.py
parentMerge pull request #1734 from matrix-org/markjh/fix_get_missing (diff)
downloadsynapse-0aff09f6c93193c2f3000e1e70e713f615445fe9.tar.xz
Add more useful logging when we block fetching events
Diffstat (limited to '')
-rw-r--r--synapse/util/async.py5
1 files changed, 5 insertions, 0 deletions
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