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Improve exception handling for background processes 

There were a bunch of places where we fire off a process to happen in the
background, but don't have any exception handling on it - instead relying on
the unhandled error being logged when the relevent deferred gets
garbage-collected.

This is unsatisfactory for a number of reasons:
 - logging on garbage collection is best-effort and may happen some time after
   the error, if at all
 - it can be hard to figure out where the error actually happened.
 - it is logged as a scary CRITICAL error which (a) I always forget to grep for
   and (b) it's not really CRITICAL if a background process we don't care about
   fails.

So this is an attempt to add exception handling to everything we fire off into
the background.
This commit is contained in:
Richard van der Hoff 2018-04-27 11:07:40 +01:00
parent 0ced8b5b47
commit 9255a6cb17
20 changed files with 331 additions and 233 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
synapse/app/appservice.py
View File

@ -32,10 +32,10 @@ from synapse.replication.tcp.client import ReplicationClientHandler
from synapse.server import HomeServer
from synapse.storage.engines import create_engine
from synapse.util.httpresourcetree import create_resource_tree
from synapse.util.logcontext import LoggingContext, preserve_fn
from synapse.util.logcontext import LoggingContext, run_in_background
from synapse.util.manhole import manhole
from synapse.util.versionstring import get_version_string
from twisted.internet import reactor
from twisted.internet import reactor, defer
from twisted.web.resource import NoResource
logger = logging.getLogger("synapse.app.appservice")
@ -112,9 +112,14 @@ class ASReplicationHandler(ReplicationClientHandler):
if stream_name == "events":
max_stream_id = self.store.get_room_max_stream_ordering()
preserve_fn(
self.appservice_handler.notify_interested_services
)(max_stream_id)
run_in_background(self._notify_app_services, max_stream_id)
@defer.inlineCallbacks
def _notify_app_services(self, room_stream_id):
try:
yield self.appservice_handler.notify_interested_services(room_stream_id)
except Exception:
logger.exception("Error notifying application services of event")
def start(config_options):

25
synapse/app/federation_sender.py
View File

@ -237,19 +237,22 @@ class FederationSenderHandler(object):
@defer.inlineCallbacks
def update_token(self, token):
self.federation_position = token
try:
self.federation_position = token
# We linearize here to ensure we don't have races updating the token
with (yield self._fed_position_linearizer.queue(None)):
if self._last_ack < self.federation_position:
yield self.store.update_federation_out_pos(
"federation", self.federation_position
)
# We linearize here to ensure we don't have races updating the token
with (yield self._fed_position_linearizer.queue(None)):
if self._last_ack < self.federation_position:
yield self.store.update_federation_out_pos(
"federation", self.federation_position
)
# We ACK this token over replication so that the master can drop
# its in memory queues
self.replication_client.send_federation_ack(self.federation_position)
self._last_ack = self.federation_position
# We ACK this token over replication so that the master can drop
# its in memory queues
self.replication_client.send_federation_ack(self.federation_position)
self._last_ack = self.federation_position
except Exception:
logger.exception("Error updating federation stream position")
if __name__ == '__main__':

31
synapse/app/pusher.py
View File

@ -144,20 +144,23 @@ class PusherReplicationHandler(ReplicationClientHandler):
@defer.inlineCallbacks
def poke_pushers(self, stream_name, token, rows):
if stream_name == "pushers":
for row in rows:
if row.deleted:
yield self.stop_pusher(row.user_id, row.app_id, row.pushkey)
else:
yield self.start_pusher(row.user_id, row.app_id, row.pushkey)
elif stream_name == "events":
yield self.pusher_pool.on_new_notifications(
token, token,
)
elif stream_name == "receipts":
yield self.pusher_pool.on_new_receipts(
token, token, set(row.room_id for row in rows)
)
try:
if stream_name == "pushers":
for row in rows:
if row.deleted:
yield self.stop_pusher(row.user_id, row.app_id, row.pushkey)
else:
yield self.start_pusher(row.user_id, row.app_id, row.pushkey)
elif stream_name == "events":
yield self.pusher_pool.on_new_notifications(
token, token,
)
elif stream_name == "receipts":
yield self.pusher_pool.on_new_receipts(
token, token, set(row.room_id for row in rows)
)
except Exception:
logger.exception("Error poking pushers")
def stop_pusher(self, user_id, app_id, pushkey):
key = "%s:%s" % (app_id, pushkey)

97
synapse/app/synchrotron.py
View File

@ -340,55 +340,58 @@ class SyncReplicationHandler(ReplicationClientHandler):
@defer.inlineCallbacks
def process_and_notify(self, stream_name, token, rows):
if stream_name == "events":
# We shouldn't get multiple rows per token for events stream, so
# we don't need to optimise this for multiple rows.
for row in rows:
event = yield self.store.get_event(row.event_id)
extra_users = ()
if event.type == EventTypes.Member:
extra_users = (event.state_key,)
max_token = self.store.get_room_max_stream_ordering()
self.notifier.on_new_room_event(
event, token, max_token, extra_users
)
elif stream_name == "push_rules":
self.notifier.on_new_event(
"push_rules_key", token, users=[row.user_id for row in rows],
)
elif stream_name in ("account_data", "tag_account_data",):
self.notifier.on_new_event(
"account_data_key", token, users=[row.user_id for row in rows],
)
elif stream_name == "receipts":
self.notifier.on_new_event(
"receipt_key", token, rooms=[row.room_id for row in rows],
)
elif stream_name == "typing":
self.typing_handler.process_replication_rows(token, rows)
self.notifier.on_new_event(
"typing_key", token, rooms=[row.room_id for row in rows],
)
elif stream_name == "to_device":
entities = [row.entity for row in rows if row.entity.startswith("@")]
if entities:
try:
if stream_name == "events":
# We shouldn't get multiple rows per token for events stream, so
# we don't need to optimise this for multiple rows.
for row in rows:
event = yield self.store.get_event(row.event_id)
extra_users = ()
if event.type == EventTypes.Member:
extra_users = (event.state_key,)
max_token = self.store.get_room_max_stream_ordering()
self.notifier.on_new_room_event(
event, token, max_token, extra_users
)
elif stream_name == "push_rules":
self.notifier.on_new_event(
"to_device_key", token, users=entities,
"push_rules_key", token, users=[row.user_id for row in rows],
)
elif stream_name == "device_lists":
all_room_ids = set()
for row in rows:
room_ids = yield self.store.get_rooms_for_user(row.user_id)
all_room_ids.update(room_ids)
self.notifier.on_new_event(
"device_list_key", token, rooms=all_room_ids,
)
elif stream_name == "presence":
yield self.presence_handler.process_replication_rows(token, rows)
elif stream_name == "receipts":
self.notifier.on_new_event(
"groups_key", token, users=[row.user_id for row in rows],
)
elif stream_name in ("account_data", "tag_account_data",):
self.notifier.on_new_event(
"account_data_key", token, users=[row.user_id for row in rows],
)
elif stream_name == "receipts":
self.notifier.on_new_event(
"receipt_key", token, rooms=[row.room_id for row in rows],
)
elif stream_name == "typing":
self.typing_handler.process_replication_rows(token, rows)
self.notifier.on_new_event(
"typing_key", token, rooms=[row.room_id for row in rows],
)
elif stream_name == "to_device":
entities = [row.entity for row in rows if row.entity.startswith("@")]
if entities:
self.notifier.on_new_event(
"to_device_key", token, users=entities,
)
elif stream_name == "device_lists":
all_room_ids = set()
for row in rows:
room_ids = yield self.store.get_rooms_for_user(row.user_id)
all_room_ids.update(room_ids)
self.notifier.on_new_event(
"device_list_key", token, rooms=all_room_ids,
)
elif stream_name == "presence":
yield self.presence_handler.process_replication_rows(token, rows)
elif stream_name == "receipts":
self.notifier.on_new_event(
"groups_key", token, users=[row.user_id for row in rows],
)
except Exception:
logger.exception("Error processing replication")
def start(config_options):

13
synapse/app/user_dir.py
View File

@ -39,10 +39,10 @@ from synapse.storage.engines import create_engine
from synapse.storage.user_directory import UserDirectoryStore
from synapse.util.caches.stream_change_cache import StreamChangeCache
from synapse.util.httpresourcetree import create_resource_tree
from synapse.util.logcontext import LoggingContext, preserve_fn
from synapse.util.logcontext import LoggingContext, run_in_background
from synapse.util.manhole import manhole
from synapse.util.versionstring import get_version_string
from twisted.internet import reactor
from twisted.internet import reactor, defer
from twisted.web.resource import NoResource
logger = logging.getLogger("synapse.app.user_dir")
@ -164,7 +164,14 @@ class UserDirectoryReplicationHandler(ReplicationClientHandler):
stream_name, token, rows
)
if stream_name == "current_state_deltas":
preserve_fn(self.user_directory.notify_new_event)()
run_in_background(self._notify_directory)
@defer.inlineCallbacks
def _notify_directory(self):
try:
yield self.user_directory.notify_new_event()
except Exception:
logger.exception("Error notifiying user directory of state update")
def start(config_options):

25
synapse/appservice/scheduler.py
View File

@ -176,17 +176,20 @@ class _TransactionController(object):
@defer.inlineCallbacks
def _start_recoverer(self, service):
yield self.store.set_appservice_state(
service,
ApplicationServiceState.DOWN
)
logger.info(
"Application service falling behind. Starting recoverer. AS ID %s",
service.id
)
recoverer = self.recoverer_fn(service, self.on_recovered)
self.add_recoverers([recoverer])
recoverer.recover()
try:
yield self.store.set_appservice_state(
service,
ApplicationServiceState.DOWN
)
logger.info(
"Application service falling behind. Starting recoverer. AS ID %s",
service.id
)
recoverer = self.recoverer_fn(service, self.on_recovered)
self.add_recoverers([recoverer])
recoverer.recover()
except Exception:
logger.exception("Error starting AS recoverer")
@defer.inlineCallbacks
def _is_service_up(self, service):

91
synapse/crypto/keyring.py
View File

@ -146,53 +146,56 @@ class Keyring(object):
verify_requests (List[VerifyKeyRequest]):
"""
# create a deferred for each server we're going to look up the keys
# for; we'll resolve them once we have completed our lookups.
# These will be passed into wait_for_previous_lookups to block
# any other lookups until we have finished.
# The deferreds are called with no logcontext.
server_to_deferred = {
rq.server_name: defer.Deferred()
for rq in verify_requests
}
try:
# create a deferred for each server we're going to look up the keys
# for; we'll resolve them once we have completed our lookups.
# These will be passed into wait_for_previous_lookups to block
# any other lookups until we have finished.
# The deferreds are called with no logcontext.
server_to_deferred = {
rq.server_name: defer.Deferred()
for rq in verify_requests
}
# We want to wait for any previous lookups to complete before
# proceeding.
yield self.wait_for_previous_lookups(
[rq.server_name for rq in verify_requests],
server_to_deferred,
)
# Actually start fetching keys.
self._get_server_verify_keys(verify_requests)
# When we've finished fetching all the keys for a given server_name,
# resolve the deferred passed to `wait_for_previous_lookups` so that
# any lookups waiting will proceed.
#
# map from server name to a set of request ids
server_to_request_ids = {}
for verify_request in verify_requests:
server_name = verify_request.server_name
request_id = id(verify_request)
server_to_request_ids.setdefault(server_name, set()).add(request_id)
def remove_deferreds(res, verify_request):
server_name = verify_request.server_name
request_id = id(verify_request)
server_to_request_ids[server_name].discard(request_id)
if not server_to_request_ids[server_name]:
d = server_to_deferred.pop(server_name, None)
if d:
d.callback(None)
return res
for verify_request in verify_requests:
verify_request.deferred.addBoth(
remove_deferreds, verify_request,
# We want to wait for any previous lookups to complete before
# proceeding.
yield self.wait_for_previous_lookups(
[rq.server_name for rq in verify_requests],
server_to_deferred,
)
# Actually start fetching keys.
self._get_server_verify_keys(verify_requests)
# When we've finished fetching all the keys for a given server_name,
# resolve the deferred passed to `wait_for_previous_lookups` so that
# any lookups waiting will proceed.
#
# map from server name to a set of request ids
server_to_request_ids = {}
for verify_request in verify_requests:
server_name = verify_request.server_name
request_id = id(verify_request)
server_to_request_ids.setdefault(server_name, set()).add(request_id)
def remove_deferreds(res, verify_request):
server_name = verify_request.server_name
request_id = id(verify_request)
server_to_request_ids[server_name].discard(request_id)
if not server_to_request_ids[server_name]:
d = server_to_deferred.pop(server_name, None)
if d:
d.callback(None)
return res
for verify_request in verify_requests:
verify_request.deferred.addBoth(
remove_deferreds, verify_request,
)
except Exception:
logger.exception("Error starting key lookups")
@defer.inlineCallbacks
def wait_for_previous_lookups(self, server_names, server_to_deferred):
"""Waits for any previous key lookups for the given servers to finish.

2
synapse/federation/transaction_queue.py
View File

@ -323,6 +323,8 @@ class TransactionQueue(object):
break
yield self._process_presence_inner(states_map.values())
except Exception:
logger.exception("Error sending presence states to servers")
finally:
self._processing_pending_presence = False

13
synapse/federation/transport/server.py
View File

@ -25,7 +25,7 @@ from synapse.http.servlet import (
)
from synapse.util.ratelimitutils import FederationRateLimiter
from synapse.util.versionstring import get_version_string
from synapse.util.logcontext import preserve_fn
from synapse.util.logcontext import run_in_background
from synapse.types import ThirdPartyInstanceID, get_domain_from_id
import functools
@ -152,11 +152,18 @@ class Authenticator(object):
# alive
retry_timings = yield self.store.get_destination_retry_timings(origin)
if retry_timings and retry_timings["retry_last_ts"]:
logger.info("Marking origin %r as up", origin)
preserve_fn(self.store.set_destination_retry_timings)(origin, 0, 0)
run_in_background(self._reset_retry_timings, origin)
defer.returnValue(origin)
@defer.inlineCallbacks
def _reset_retry_timings(self, origin):
try:
logger.info("Marking origin %r as up", origin)
yield self.store.set_destination_retry_timings(origin, 0, 0)
except Exception:
logger.exception("Error resetting retry timings on %s", origin)
class BaseFederationServlet(object):
REQUIRE_AUTH = True

44
synapse/groups/attestations.py
View File

@ -165,28 +165,32 @@ class GroupAttestionRenewer(object):
@defer.inlineCallbacks
def _renew_attestation(group_id, user_id):
if not self.is_mine_id(group_id):
destination = get_domain_from_id(group_id)
elif not self.is_mine_id(user_id):
destination = get_domain_from_id(user_id)
else:
logger.warn(
"Incorrectly trying to do attestations for user: %r in %r",
user_id, group_id,
try:
if not self.is_mine_id(group_id):
destination = get_domain_from_id(group_id)
elif not self.is_mine_id(user_id):
destination = get_domain_from_id(user_id)
else:
logger.warn(
"Incorrectly trying to do attestations for user: %r in %r",
user_id, group_id,
)
yield self.store.remove_attestation_renewal(group_id, user_id)
return
attestation = self.attestations.create_attestation(group_id, user_id)
yield self.transport_client.renew_group_attestation(
destination, group_id, user_id,
content={"attestation": attestation},
)
yield self.store.remove_attestation_renewal(group_id, user_id)
return
attestation = self.attestations.create_attestation(group_id, user_id)
yield self.transport_client.renew_group_attestation(
destination, group_id, user_id,
content={"attestation": attestation},
)
yield self.store.update_attestation_renewal(
group_id, user_id, attestation
)
yield self.store.update_attestation_renewal(
group_id, user_id, attestation
)
except Exception:
logger.exception("Error renewing attestation of %r in %r",
user_id, group_id)
for row in rows:
group_id = row["group_id"]

22
synapse/handlers/message.py
View File

@ -857,15 +857,25 @@ class EventCreationHandler(object):
@defer.inlineCallbacks
def _notify():
yield run_on_reactor()
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id,
extra_users=extra_users
)
try:
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id,
extra_users=extra_users
)
except Exception:
logger.exception("Error notifying about new room event")
preserve_fn(_notify)()
if event.type == EventTypes.Message:
presence = self.hs.get_presence_handler()
# We don't want to block sending messages on any presence code. This
# matters as sometimes presence code can take a while.
preserve_fn(presence.bump_presence_active_time)(requester.user)
run_in_background(self._bump_active_time, requester.user)
@defer.inlineCallbacks
def _bump_active_time(self, user):
try:
presence = self.hs.get_presence_handler()
yield presence.bump_presence_active_time(user)
except Exception:
logger.exception("Error bumping presence active time")

19
synapse/handlers/presence.py
View File

@ -31,7 +31,7 @@ from synapse.storage.presence import UserPresenceState
from synapse.util.caches.descriptors import cachedInlineCallbacks
from synapse.util.async import Linearizer
from synapse.util.logcontext import preserve_fn
from synapse.util.logcontext import run_in_background
from synapse.util.logutils import log_function
from synapse.util.metrics import Measure
from synapse.util.wheel_timer import WheelTimer
@ -254,6 +254,14 @@ class PresenceHandler(object):
logger.info("Finished _persist_unpersisted_changes")
@defer.inlineCallbacks
def _update_states_and_catch_exception(self, new_states):
try:
res = yield self._update_states(new_states)
defer.returnValue(res)
except Exception:
logger.exception("Error updating presence")
@defer.inlineCallbacks
def _update_states(self, new_states):
"""Updates presence of users. Sets the appropriate timeouts. Pokes
@ -364,7 +372,7 @@ class PresenceHandler(object):
now=now,
)
preserve_fn(self._update_states)(changes)
run_in_background(self._update_states_and_catch_exception, changes)
except Exception:
logger.exception("Exception in _handle_timeouts loop")
@ -422,20 +430,23 @@ class PresenceHandler(object):
@defer.inlineCallbacks
def _end():
if affect_presence:
try:
self.user_to_num_current_syncs[user_id] -= 1
prev_state = yield self.current_state_for_user(user_id)
yield self._update_states([prev_state.copy_and_replace(
last_user_sync_ts=self.clock.time_msec(),
)])
except Exception:
logger.exception("Error updating presence after sync")
@contextmanager
def _user_syncing():
try:
yield
finally:
preserve_fn(_end)()
if affect_presence:
run_in_background(_end)
defer.returnValue(_user_syncing())

55
synapse/handlers/receipts.py
View File

@ -135,37 +135,40 @@ class ReceiptsHandler(BaseHandler):
"""Given a list of receipts, works out which remote servers should be
poked and pokes them.
"""
# TODO: Some of this stuff should be coallesced.
for receipt in receipts:
room_id = receipt["room_id"]
receipt_type = receipt["receipt_type"]
user_id = receipt["user_id"]
event_ids = receipt["event_ids"]
data = receipt["data"]
try:
# TODO: Some of this stuff should be coallesced.
for receipt in receipts:
room_id = receipt["room_id"]
receipt_type = receipt["receipt_type"]
user_id = receipt["user_id"]
event_ids = receipt["event_ids"]
data = receipt["data"]
users = yield self.state.get_current_user_in_room(room_id)
remotedomains = set(get_domain_from_id(u) for u in users)
remotedomains = remotedomains.copy()
remotedomains.discard(self.server_name)
users = yield self.state.get_current_user_in_room(room_id)
remotedomains = set(get_domain_from_id(u) for u in users)
remotedomains = remotedomains.copy()
remotedomains.discard(self.server_name)
logger.debug("Sending receipt to: %r", remotedomains)
logger.debug("Sending receipt to: %r", remotedomains)
for domain in remotedomains:
self.federation.send_edu(
destination=domain,
edu_type="m.receipt",
content={
room_id: {
receipt_type: {
user_id: {
"event_ids": event_ids,
"data": data,
for domain in remotedomains:
self.federation.send_edu(
destination=domain,
edu_type="m.receipt",
content={
room_id: {
receipt_type: {
user_id: {
"event_ids": event_ids,
"data": data,
}
}
}
},
},
},
key=(room_id, receipt_type, user_id),
)
key=(room_id, receipt_type, user_id),
)
except Exception:
logger.exception("Error pushing receipts to remote servers")
@defer.inlineCallbacks
def get_receipts_for_room(self, room_id, to_key):

43
synapse/handlers/typing.py
View File

@ -205,28 +205,31 @@ class TypingHandler(object):
@defer.inlineCallbacks
def _push_remote(self, member, typing):
users = yield self.state.get_current_user_in_room(member.room_id)
self._member_last_federation_poke[member] = self.clock.time_msec()
try:
users = yield self.state.get_current_user_in_room(member.room_id)
self._member_last_federation_poke[member] = self.clock.time_msec()
now = self.clock.time_msec()
self.wheel_timer.insert(
now=now,
obj=member,
then=now + FEDERATION_PING_INTERVAL,
)
now = self.clock.time_msec()
self.wheel_timer.insert(
now=now,
obj=member,
then=now + FEDERATION_PING_INTERVAL,
)
for domain in set(get_domain_from_id(u) for u in users):
if domain != self.server_name:
self.federation.send_edu(
destination=domain,
edu_type="m.typing",
content={
"room_id": member.room_id,
"user_id": member.user_id,
"typing": typing,
},
key=member,
)
for domain in set(get_domain_from_id(u) for u in users):
if domain != self.server_name:
self.federation.send_edu(
destination=domain,
edu_type="m.typing",
content={
"room_id": member.room_id,
"user_id": member.user_id,
"typing": typing,
},
key=member,
)
except Exception:
logger.exception("Error pushing typing notif to remotes")
@defer.inlineCallbacks
def _recv_edu(self, origin, content):

13
synapse/notifier.py
View File

@ -21,7 +21,7 @@ from synapse.handlers.presence import format_user_presence_state
from synapse.util import DeferredTimedOutError
from synapse.util.logutils import log_function
from synapse.util.async import ObservableDeferred
from synapse.util.logcontext import PreserveLoggingContext, preserve_fn
from synapse.util.logcontext import PreserveLoggingContext, run_in_background
from synapse.util.metrics import Measure
from synapse.types import StreamToken
from synapse.visibility import filter_events_for_client
@ -251,9 +251,7 @@ class Notifier(object):
def _on_new_room_event(self, event, room_stream_id, extra_users=[]):
"""Notify any user streams that are interested in this room event"""
# poke any interested application service.
preserve_fn(self.appservice_handler.notify_interested_services)(
room_stream_id
)
run_in_background(self._notify_app_services, room_stream_id)
if self.federation_sender:
self.federation_sender.notify_new_events(room_stream_id)
@ -267,6 +265,13 @@ class Notifier(object):
rooms=[event.room_id],
)
@defer.inlineCallbacks
def _notify_app_services(self, room_stream_id):
try:
yield self.appservice_handler.notify_interested_services(room_stream_id)
except Exception:
logger.exception("Error notifying application services of event")
def on_new_event(self, stream_key, new_token, users=[], rooms=[]):
""" Used to inform listeners that something has happend event wise.

11
synapse/push/emailpusher.py
View File

@ -77,10 +77,13 @@ class EmailPusher(object):
@defer.inlineCallbacks
def on_started(self):
if self.mailer is not None:
self.throttle_params = yield self.store.get_throttle_params_by_room(
self.pusher_id
)
yield self._process()
try:
self.throttle_params = yield self.store.get_throttle_params_by_room(
self.pusher_id
)
yield self._process()
except Exception:
logger.exception("Error starting email pusher")
def on_stop(self):
if self.timed_call:

5
synapse/push/httppusher.py
View File

@ -94,7 +94,10 @@ class HttpPusher(object):
@defer.inlineCallbacks
def on_started(self):
yield self._process()
try:
yield self._process()
except Exception:
logger.exception("Error starting http pusher")
@defer.inlineCallbacks
def on_new_notifications(self, min_stream_ordering, max_stream_ordering):

9
synapse/rest/media/v1/storage_provider.py
View File

@ -18,7 +18,7 @@ from twisted.internet import defer, threads
from .media_storage import FileResponder
from synapse.config._base import Config
from synapse.util.logcontext import preserve_fn
from synapse.util.logcontext import run_in_background
import logging
import os
@ -87,7 +87,12 @@ class StorageProviderWrapper(StorageProvider):
return self.backend.store_file(path, file_info)
else:
# TODO: Handle errors.
preserve_fn(self.backend.store_file)(path, file_info)
def store():
try:
return self.backend.store_file(path, file_info)
except Exception:
logger.exception("Error storing file")
run_in_background(store)
return defer.succeed(None)
def fetch(self, path, file_info):

24
synapse/storage/event_push_actions.py
View File

@ -448,6 +448,7 @@ class EventPushActionsWorkerStore(SQLBaseStore):
"add_push_actions_to_staging", _add_push_actions_to_staging_txn
)
@defer.inlineCallbacks
def remove_push_actions_from_staging(self, event_id):
"""Called if we failed to persist the event to ensure that stale push
actions don't build up in the DB
@ -456,13 +457,22 @@ class EventPushActionsWorkerStore(SQLBaseStore):
event_id (str)
"""
return self._simple_delete(
table="event_push_actions_staging",
keyvalues={
"event_id": event_id,
},
desc="remove_push_actions_from_staging",
)
try:
res = yield self._simple_delete(
table="event_push_actions_staging",
keyvalues={
"event_id": event_id,
},
desc="remove_push_actions_from_staging",
)
defer.returnValue(res)
except Exception:
# this method is called from an exception handler, so propagating
# another exception here really isn't helpful - there's nothing
# the caller can do about it. Just log the exception and move on.
logger.exception(
"Error removing push actions after event persistence failure",
)
@defer.inlineCallbacks
def _find_stream_orderings_for_times(self):

7
synapse/util/logcontext.py
View File

@ -305,7 +305,12 @@ def run_in_background(f, *args, **kwargs):
deferred returned by the funtion completes.
Useful for wrapping functions that return a deferred which you don't yield
on.
on (for instance because you want to pass it to deferred.gatherResults()).
Note that if you completely discard the result, you should make sure that
`f` doesn't raise any deferred exceptions, otherwise a scary-looking
CRITICAL error about an unhandled error will be logged without much
indication about where it came from.
"""
current = LoggingContext.current_context()
res = f(*args, **kwargs)