diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py
index 30e2742102..a6b31e8b5b 100644
--- a/synapse/crypto/keyring.py
+++ b/synapse/crypto/keyring.py
@@ -40,6 +40,7 @@ from synapse.api.errors import Codes, SynapseError
from synapse.crypto.keyclient import fetch_server_key
from synapse.util import logcontext, unwrapFirstError
from synapse.util.logcontext import (
+ LoggingContext,
PreserveLoggingContext,
preserve_fn,
run_in_background,
@@ -216,23 +217,34 @@ class Keyring(object):
servers have completed. Follows the synapse rules of logcontext
preservation.
"""
+ loop_count = 1
while True:
wait_on = [
- self.key_downloads[server_name]
+ (server_name, self.key_downloads[server_name])
for server_name in server_names
if server_name in self.key_downloads
]
- if wait_on:
- with PreserveLoggingContext():
- yield defer.DeferredList(wait_on)
- else:
+ if not wait_on:
break
+ logger.info(
+ "Waiting for existing lookups for %s to complete [loop %i]",
+ [w[0] for w in wait_on], loop_count,
+ )
+ with PreserveLoggingContext():
+ yield defer.DeferredList((w[1] for w in wait_on))
+
+ loop_count += 1
+
+ ctx = LoggingContext.current_context()
def rm(r, server_name_):
- self.key_downloads.pop(server_name_, None)
+ with PreserveLoggingContext(ctx):
+ logger.debug("Releasing key lookup lock on %s", server_name_)
+ self.key_downloads.pop(server_name_, None)
return r
for server_name, deferred in server_to_deferred.items():
+ logger.debug("Got key lookup lock on %s", server_name)
self.key_downloads[server_name] = deferred
deferred.addBoth(rm, server_name)
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