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Merge pull request #1736 from matrix-org/markjh/linearizer_logging

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Add more useful logging when we block fetching events
This commit is contained in:
Mark Haines 2016-12-30 20:05:12 +00:00 committed by GitHub
commit 321d5b73d8
2 changed files with 14 additions and 0 deletions
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9
synapse/federation/federation_server.py
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@ -538,7 +538,16 @@ class FederationServer(FederationBase):
if get_missing and prevs - seen:
# If we're missing stuff, ensure we only fetch stuff one
# at a time.
logger.info(
"Acquiring lock for room %r to fetch %d missing events: %r...",
pdu.room_id, len(prevs - seen), list(prevs - seen)[:5],
)
with (yield self._room_pdu_linearizer.queue(pdu.room_id)):
logger.info(
"Acquired lock for room %r to fetch %d missing events",
pdu.room_id, len(prevs - seen),
)
# We recalculate seen, since it may have changed.
have_seen = yield self.store.have_events(prevs)
seen = set(have_seen.keys())

5
synapse/util/async.py
View File

@ -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 acquire linearizer lock for key %r", key)
with PreserveLoggingContext():
yield current_defer