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-rw-r--r--synapse/util/__init__.py7
-rw-r--r--synapse/util/logcontext.py4
2 files changed, 10 insertions, 1 deletions
diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py
index c9a73b0413..9ad613b8f1 100644
--- a/synapse/util/__init__.py
+++ b/synapse/util/__init__.py
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from synapse.util.logcontext import LoggingContext
 
 from twisted.internet import reactor
 
@@ -35,7 +36,11 @@ class Clock(object):
         return self.time() * 1000
 
     def call_later(self, delay, callback):
-        return reactor.callLater(delay, callback)
+        current_context = LoggingContext.current_context()
+        def wrapped_callback():
+            current_context.thread_local.current_context = current_context
+            callback()
+        return reactor.callLater(delay, wrapped_callback)
 
     def cancel_call_later(self, timer):
         timer.cancel()
diff --git a/synapse/util/logcontext.py b/synapse/util/logcontext.py
index 13176b05ce..2f430a0f19 100644
--- a/synapse/util/logcontext.py
+++ b/synapse/util/logcontext.py
@@ -18,6 +18,9 @@ class LoggingContext(object):
 
         __slots__ = []
 
+        def __str__(self):
+            return "sentinel"
+
         def copy_to(self, record):
             pass
 
@@ -102,6 +105,7 @@ class PreserveLoggingContext(object):
     def __enter__(self):
         """Captures the current logging context"""
         self.current_context = LoggingContext.current_context()
+        LoggingContext.thread_local.current_context = LoggingContext.sentinel
 
     def __exit__(self, type, value, traceback):
         """Restores the current logging context"""