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Merge pull request #564 from matrix-org/erikj/logcontext

Browse source 
Fix up logcontexts
This commit is contained in:
Erik Johnston 2016-02-08 15:16:16 +00:00
commit 2bb5f035af
31 changed files with 356 additions and 229 deletions
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4
synapse/api/auth.py
View file

@ -24,6 +24,7 @@ from synapse.api.constants import EventTypes, Membership, JoinRules
from synapse.api.errors import AuthError, Codes, SynapseError, EventSizeError
from synapse.types import Requester, RoomID, UserID, EventID
from synapse.util.logutils import log_function
from synapse.util.logcontext import preserve_context_over_fn
from unpaddedbase64 import decode_base64
import logging
@ -529,7 +530,8 @@ class Auth(object):
default=[""]
)[0]
if user and access_token and ip_addr:
self.store.insert_client_ip(
preserve_context_over_fn(
self.store.insert_client_ip,
user=user,
access_token=access_token,
ip=ip_addr,

2
synapse/app/homeserver.py
View file

@ -709,6 +709,8 @@ def run(hs):
phone_home_task.start(60 * 60 * 24, now=False)
def in_thread():
# Uncomment to enable tracing of log context changes.
# sys.settrace(logcontext_tracer)
with LoggingContext("run"):
change_resource_limit(hs.config.soft_file_limit)
reactor.run()

19
synapse/crypto/keyring.py
View file

@ -18,6 +18,10 @@ from synapse.api.errors import SynapseError, Codes
from synapse.util.retryutils import get_retry_limiter
from synapse.util import unwrapFirstError
from synapse.util.async import ObservableDeferred
from synapse.util.logcontext import (
preserve_context_over_deferred, preserve_context_over_fn, PreserveLoggingContext,
preserve_fn
)
from twisted.internet import defer
@ -142,6 +146,8 @@ class Keyring(object):
for server_name, _ in server_and_json
}
with PreserveLoggingContext():
# We want to wait for any previous lookups to complete before
# proceeding.
wait_on_deferred = self.wait_for_previous_lookups(
@ -175,7 +181,8 @@ class Keyring(object):
# Pass those keys to handle_key_deferred so that the json object
# signatures can be verified
return [
handle_key_deferred(
preserve_context_over_fn(
handle_key_deferred,
group_id_to_group[g_id],
deferreds[g_id],
)
@ -198,12 +205,13 @@ class Keyring(object):
if server_name in self.key_downloads
]
if wait_on:
with PreserveLoggingContext():
yield defer.DeferredList(wait_on)
else:
break
for server_name, deferred in server_to_deferred.items():
d = ObservableDeferred(deferred)
d = ObservableDeferred(preserve_context_over_deferred(deferred))
self.key_downloads[server_name] = d
def rm(r, server_name):
@ -244,6 +252,7 @@ class Keyring(object):
for group in group_id_to_group.values():
for key_id in group.key_ids:
if key_id in merged_results[group.server_name]:
with PreserveLoggingContext():
group_id_to_deferred[group.group_id].callback((
group.group_id,
group.server_name,
@ -504,7 +513,7 @@ class Keyring(object):
yield defer.gatherResults(
[
self.store_keys(
preserve_fn(self.store_keys)(
server_name=key_server_name,
from_server=server_name,
verify_keys=verify_keys,
@ -573,7 +582,7 @@ class Keyring(object):
yield defer.gatherResults(
[
self.store.store_server_keys_json(
preserve_fn(self.store.store_server_keys_json)(
server_name=server_name,
key_id=key_id,
from_server=server_name,
@ -675,7 +684,7 @@ class Keyring(object):
# TODO(markjh): Store whether the keys have expired.
yield defer.gatherResults(
[
self.store.store_server_verify_key(
preserve_fn(self.store.store_server_verify_key)(
server_name, server_name, key.time_added, key
)
for key_id, key in verify_keys.items()

4
synapse/federation/federation_server.py
View file

@ -126,10 +126,8 @@ class FederationServer(FederationBase):
results = []
for pdu in pdu_list:
d = self._handle_new_pdu(transaction.origin, pdu)
try:
yield d
yield self._handle_new_pdu(transaction.origin, pdu)
results.append({})
except FederationError as e:
self.send_failure(e, transaction.origin)

3
synapse/federation/transaction_queue.py
View file

@ -103,7 +103,6 @@ class TransactionQueue(object):
else:
return not destination.startswith("localhost")
@defer.inlineCallbacks
def enqueue_pdu(self, pdu, destinations, order):
# We loop through all destinations to see whether we already have
# a transaction in progress. If we do, stick it in the pending_pdus
@ -141,8 +140,6 @@ class TransactionQueue(object):
deferreds.append(deferred)
yield defer.DeferredList(deferreds, consumeErrors=True)
# NO inlineCallbacks
def enqueue_edu(self, edu):
destination = edu.destination

10
synapse/handlers/_base.py
View file

@ -293,19 +293,11 @@ class BaseHandler(object):
with PreserveLoggingContext():
# Don't block waiting on waking up all the listeners.
notify_d = self.notifier.on_new_room_event(
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id,
extra_users=extra_users
)
def log_failure(f):
logger.warn(
"Failed to notify about %s: %s",
event.event_id, f.value
)
notify_d.addErrback(log_failure)
# If invite, remove room_state from unsigned before sending.
event.unsigned.pop("invite_room_state", None)

11
synapse/handlers/events.py
View file

@ -18,6 +18,7 @@ from twisted.internet import defer
from synapse.util.logutils import log_function
from synapse.types import UserID
from synapse.events.utils import serialize_event
from synapse.util.logcontext import preserve_context_over_fn
from ._base import BaseHandler
@ -29,11 +30,17 @@ logger = logging.getLogger(__name__)
def started_user_eventstream(distributor, user):
return distributor.fire("started_user_eventstream", user)
return preserve_context_over_fn(
distributor.fire,
"started_user_eventstream", user
)
def stopped_user_eventstream(distributor, user):
return distributor.fire("stopped_user_eventstream", user)
return preserve_context_over_fn(
distributor.fire,
"stopped_user_eventstream", user
)
class EventStreamHandler(BaseHandler):

50
synapse/handlers/federation.py
View file

@ -221,19 +221,11 @@ class FederationHandler(BaseHandler):
extra_users.append(target_user)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id,
extra_users=extra_users
)
def log_failure(f):
logger.warn(
"Failed to notify about %s: %s",
event.event_id, f.value
)
d.addErrback(log_failure)
if event.type == EventTypes.Member:
if event.membership == Membership.JOIN:
prev_state = context.current_state.get((event.type, event.state_key))
@ -643,19 +635,11 @@ class FederationHandler(BaseHandler):
)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id,
extra_users=[joinee]
)
def log_failure(f):
logger.warn(
"Failed to notify about %s: %s",
event.event_id, f.value
)
d.addErrback(log_failure)
logger.debug("Finished joining %s to %s", joinee, room_id)
finally:
room_queue = self.room_queues[room_id]
@ -730,18 +714,10 @@ class FederationHandler(BaseHandler):
extra_users.append(target_user)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id, extra_users=extra_users
)
def log_failure(f):
logger.warn(
"Failed to notify about %s: %s",
event.event_id, f.value
)
d.addErrback(log_failure)
if event.type == EventTypes.Member:
if event.content["membership"] == Membership.JOIN:
user = UserID.from_string(event.state_key)
@ -811,19 +787,11 @@ class FederationHandler(BaseHandler):
target_user = UserID.from_string(event.state_key)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id,
extra_users=[target_user],
)
def log_failure(f):
logger.warn(
"Failed to notify about %s: %s",
event.event_id, f.value
)
d.addErrback(log_failure)
defer.returnValue(event)
@defer.inlineCallbacks
@ -948,18 +916,10 @@ class FederationHandler(BaseHandler):
extra_users.append(target_user)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
self.notifier.on_new_room_event(
event, event_stream_id, max_stream_id, extra_users=extra_users
)
def log_failure(f):
logger.warn(
"Failed to notify about %s: %s",
event.event_id, f.value
)
d.addErrback(log_failure)
new_pdu = event
destinations = set()

8
synapse/handlers/presence.py
View file

@ -378,9 +378,9 @@ class PresenceHandler(BaseHandler):
was_polling = target_user in self._user_cachemap
if now_online and not was_polling:
self.start_polling_presence(target_user, state=state)
yield self.start_polling_presence(target_user, state=state)
elif not now_online and was_polling:
self.stop_polling_presence(target_user)
yield self.stop_polling_presence(target_user)
# TODO(paul): perform a presence push as part of start/stop poll so
# we don't have to do this all the time
@ -394,6 +394,7 @@ class PresenceHandler(BaseHandler):
if now - prev_state.state.get("last_active", 0) < LAST_ACTIVE_GRANULARITY:
return
with PreserveLoggingContext():
self.changed_presencelike_data(user, {"last_active": now})
def get_joined_rooms_for_user(self, user):
@ -466,6 +467,7 @@ class PresenceHandler(BaseHandler):
local_user, room_ids=[room_id], add_to_cache=False
)
with PreserveLoggingContext():
self.push_update_to_local_and_remote(
observed_user=local_user,
users_to_push=[user],
@ -556,7 +558,7 @@ class PresenceHandler(BaseHandler):
observer_user.localpart, observed_user.to_string()
)
self.start_polling_presence(
yield self.start_polling_presence(
observer_user, target_user=observed_user
)

2
synapse/handlers/register.py
View file

@ -186,7 +186,7 @@ class RegistrationHandler(BaseHandler):
token=token,
password_hash=""
)
registered_user(self.distributor, user)
yield registered_user(self.distributor, user)
defer.returnValue((user_id, token))
@defer.inlineCallbacks

11
synapse/handlers/room.py
View file

@ -25,6 +25,7 @@ from synapse.api.constants import (
from synapse.api.errors import AuthError, StoreError, SynapseError, Codes
from synapse.util import stringutils, unwrapFirstError
from synapse.util.async import run_on_reactor
from synapse.util.logcontext import preserve_context_over_fn
from signedjson.sign import verify_signed_json
from signedjson.key import decode_verify_key_bytes
@ -46,11 +47,17 @@ def collect_presencelike_data(distributor, user, content):
def user_left_room(distributor, user, room_id):
return distributor.fire("user_left_room", user=user, room_id=room_id)
return preserve_context_over_fn(
distributor.fire,
"user_left_room", user=user, room_id=room_id
)
def user_joined_room(distributor, user, room_id):
return distributor.fire("user_joined_room", user=user, room_id=room_id)
return preserve_context_over_fn(
distributor.fire,
"user_joined_room", user=user, room_id=room_id
)
class RoomCreationHandler(BaseHandler):

4
synapse/handlers/sync.py
View file

@ -18,7 +18,7 @@ from ._base import BaseHandler
from synapse.streams.config import PaginationConfig
from synapse.api.constants import Membership, EventTypes
from synapse.util import unwrapFirstError
from synapse.util.logcontext import LoggingContext
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
from twisted.internet import defer
@ -241,6 +241,7 @@ class SyncHandler(BaseHandler):
deferreds = []
for event in room_list:
if event.membership == Membership.JOIN:
with PreserveLoggingContext(LoggingContext.current_context()):
room_sync_deferred = self.full_state_sync_for_joined_room(
room_id=event.room_id,
sync_config=sync_config,
@ -262,6 +263,7 @@ class SyncHandler(BaseHandler):
leave_token = now_token.copy_and_replace(
"room_key", "s%d" % (event.stream_ordering,)
)
with PreserveLoggingContext(LoggingContext.current_context()):
room_sync_deferred = self.full_state_sync_for_archived_room(
sync_config=sync_config,
room_id=event.room_id,

5
synapse/http/server.py
View file

@ -99,9 +99,8 @@ def request_handler(request_handler):
request_context.request = request_id
with request.processing():
try:
d = request_handler(self, request)
with PreserveLoggingContext():
yield d
with PreserveLoggingContext(request_context):
yield request_handler(self, request)
except CodeMessageException as e:
code = e.code
if isinstance(e, SynapseError):

16
synapse/notifier.py
View file

@ -18,7 +18,8 @@ from synapse.api.constants import EventTypes
from synapse.api.errors import AuthError
from synapse.util.logutils import log_function
from synapse.util.async import run_on_reactor, ObservableDeferred
from synapse.util.async import ObservableDeferred
from synapse.util.logcontext import PreserveLoggingContext
from synapse.types import StreamToken
import synapse.metrics
@ -73,6 +74,7 @@ class _NotifierUserStream(object):
self.current_token = current_token
self.last_notified_ms = time_now_ms
with PreserveLoggingContext():
self.notify_deferred = ObservableDeferred(defer.Deferred())
def notify(self, stream_key, stream_id, time_now_ms):
@ -88,6 +90,8 @@ class _NotifierUserStream(object):
)
self.last_notified_ms = time_now_ms
noify_deferred = self.notify_deferred
with PreserveLoggingContext():
self.notify_deferred = ObservableDeferred(defer.Deferred())
noify_deferred.callback(self.current_token)
@ -184,8 +188,6 @@ class Notifier(object):
lambda: count(bool, self.appservice_to_user_streams.values()),
)
@log_function
@defer.inlineCallbacks
def on_new_room_event(self, event, room_stream_id, max_room_stream_id,
extra_users=[]):
""" Used by handlers to inform the notifier something has happened
@ -199,8 +201,7 @@ class Notifier(object):
until all previous events have been persisted before notifying
the client streams.
"""
yield run_on_reactor()
with PreserveLoggingContext():
self.pending_new_room_events.append((
room_stream_id, event, extra_users
))
@ -251,15 +252,13 @@ class Notifier(object):
extra_streams=app_streams,
)
@defer.inlineCallbacks
@log_function
def on_new_event(self, stream_key, new_token, users=[], rooms=[],
extra_streams=set()):
""" Used to inform listeners that something has happend event wise.
Will wake up all listeners for the given users and rooms.
"""
yield run_on_reactor()
with PreserveLoggingContext():
user_streams = set()
for user in users:
@ -325,6 +324,7 @@ class Notifier(object):
# that we don't miss any current_token updates.
prev_token = current_token
listener = user_stream.new_listener(prev_token)
with PreserveLoggingContext():
yield listener.deferred
except defer.CancelledError:
break

2
synapse/push/__init__.py
View file

@ -111,7 +111,7 @@ class Pusher(object):
self.user_id, config, timeout=0, affect_presence=False
)
self.last_token = chunk['end']
self.store.update_pusher_last_token(
yield self.store.update_pusher_last_token(
self.app_id, self.pushkey, self.user_id, self.last_token
)
logger.info("New pusher %s for user %s starting from token %s",

9
synapse/push/pusherpool.py
View file

@ -18,6 +18,7 @@ from twisted.internet import defer
from httppusher import HttpPusher
from synapse.push import PusherConfigException
from synapse.util.logcontext import preserve_fn
import logging
@ -76,7 +77,7 @@ class PusherPool:
"Removing pusher for app id %s, pushkey %s, user %s",
app_id, pushkey, p['user_name']
)
self.remove_pusher(p['app_id'], p['pushkey'], p['user_name'])
yield self.remove_pusher(p['app_id'], p['pushkey'], p['user_name'])
@defer.inlineCallbacks
def remove_pushers_by_user(self, user_id):
@ -91,7 +92,7 @@ class PusherPool:
"Removing pusher for app id %s, pushkey %s, user %s",
p['app_id'], p['pushkey'], p['user_name']
)
self.remove_pusher(p['app_id'], p['pushkey'], p['user_name'])
yield self.remove_pusher(p['app_id'], p['pushkey'], p['user_name'])
@defer.inlineCallbacks
def _add_pusher_to_store(self, user_id, access_token, profile_tag, kind,
@ -110,7 +111,7 @@ class PusherPool:
lang=lang,
data=data,
)
self._refresh_pusher(app_id, pushkey, user_id)
yield self._refresh_pusher(app_id, pushkey, user_id)
def _create_pusher(self, pusherdict):
if pusherdict['kind'] == 'http':
@ -166,7 +167,7 @@ class PusherPool:
if fullid in self.pushers:
self.pushers[fullid].stop()
self.pushers[fullid] = p
p.start()
preserve_fn(p.start)()
logger.info("Started pushers")

4
synapse/rest/client/v2_alpha/account_data.py
View file

@ -57,7 +57,7 @@ class AccountDataServlet(RestServlet):
user_id, account_data_type, body
)
yield self.notifier.on_new_event(
self.notifier.on_new_event(
"account_data_key", max_id, users=[user_id]
)
@ -99,7 +99,7 @@ class RoomAccountDataServlet(RestServlet):
user_id, room_id, account_data_type, body
)
yield self.notifier.on_new_event(
self.notifier.on_new_event(
"account_data_key", max_id, users=[user_id]
)

4
synapse/rest/client/v2_alpha/tags.py
View file

@ -80,7 +80,7 @@ class TagServlet(RestServlet):
max_id = yield self.store.add_tag_to_room(user_id, room_id, tag, body)
yield self.notifier.on_new_event(
self.notifier.on_new_event(
"account_data_key", max_id, users=[user_id]
)
@ -94,7 +94,7 @@ class TagServlet(RestServlet):
max_id = yield self.store.remove_tag_from_room(user_id, room_id, tag)
yield self.notifier.on_new_event(
self.notifier.on_new_event(
"account_data_key", max_id, users=[user_id]
)

10
synapse/storage/_base.py
View file

@ -15,7 +15,7 @@
import logging
from synapse.api.errors import StoreError
from synapse.util.logcontext import preserve_context_over_fn, LoggingContext
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
from synapse.util.caches.dictionary_cache import DictionaryCache
from synapse.util.caches.descriptors import Cache
import synapse.metrics
@ -298,8 +298,8 @@ class SQLBaseStore(object):
func, *args, **kwargs
)
result = yield preserve_context_over_fn(
self._db_pool.runWithConnection,
with PreserveLoggingContext():
result = yield self._db_pool.runWithConnection(
inner_func, *args, **kwargs
)
@ -326,8 +326,8 @@ class SQLBaseStore(object):
return func(conn, *args, **kwargs)
result = yield preserve_context_over_fn(
self._db_pool.runWithConnection,
with PreserveLoggingContext():
result = yield self._db_pool.runWithConnection(
inner_func, *args, **kwargs
)

12
synapse/storage/events.py
View file

@ -19,7 +19,7 @@ from twisted.internet import defer, reactor
from synapse.events import FrozenEvent, USE_FROZEN_DICTS
from synapse.events.utils import prune_event
from synapse.util.logcontext import preserve_context_over_deferred
from synapse.util.logcontext import preserve_fn, PreserveLoggingContext
from synapse.util.logutils import log_function
from synapse.api.constants import EventTypes
@ -664,6 +664,7 @@ class EventsStore(SQLBaseStore):
for ids, d in lst:
if not d.called:
try:
with PreserveLoggingContext():
d.callback([
res[i]
for i in ids
@ -671,6 +672,7 @@ class EventsStore(SQLBaseStore):
])
except:
logger.exception("Failed to callback")
with PreserveLoggingContext():
reactor.callFromThread(fire, event_list, row_dict)
except Exception as e:
logger.exception("do_fetch")
@ -679,9 +681,11 @@ class EventsStore(SQLBaseStore):
def fire(evs):
for _, d in evs:
if not d.called:
with PreserveLoggingContext():
d.errback(e)
if event_list:
with PreserveLoggingContext():
reactor.callFromThread(fire, event_list)
@defer.inlineCallbacks
@ -709,18 +713,20 @@ class EventsStore(SQLBaseStore):
should_start = False
if should_start:
with PreserveLoggingContext():
self.runWithConnection(
self._do_fetch
)
rows = yield preserve_context_over_deferred(events_d)
with PreserveLoggingContext():
rows = yield events_d
if not allow_rejected:
rows[:] = [r for r in rows if not r["rejects"]]
res = yield defer.gatherResults(
[
self._get_event_from_row(
preserve_fn(self._get_event_from_row)(
row["internal_metadata"], row["json"], row["redacts"],
check_redacted=check_redacted,
get_prev_content=get_prev_content,

5
synapse/storage/presence.py
View file

@ -68,8 +68,9 @@ class PresenceStore(SQLBaseStore):
for row in rows
})
@defer.inlineCallbacks
def set_presence_state(self, user_localpart, new_state):
res = self._simple_update_one(
res = yield self._simple_update_one(
table="presence",
keyvalues={"user_id": user_localpart},
updatevalues={"state": new_state["state"],
@ -79,7 +80,7 @@ class PresenceStore(SQLBaseStore):
)
self.get_presence_state.invalidate((user_localpart,))
return res
defer.returnValue(res)
def allow_presence_visible(self, observed_localpart, observer_userid):
return self._simple_insert(

9
synapse/storage/stream.py
View file

@ -39,6 +39,7 @@ from ._base import SQLBaseStore
from synapse.util.caches.descriptors import cachedInlineCallbacks
from synapse.api.constants import EventTypes
from synapse.types import RoomStreamToken
from synapse.util.logcontext import preserve_fn
import logging
@ -170,12 +171,12 @@ class StreamStore(SQLBaseStore):
room_ids = list(room_ids)
for rm_ids in (room_ids[i:i + 20] for i in xrange(0, len(room_ids), 20)):
res = yield defer.gatherResults([
self.get_room_events_stream_for_room(
room_id, from_key, to_key, limit
).addCallback(lambda r, rm: (rm, r), room_id)
preserve_fn(self.get_room_events_stream_for_room)(
room_id, from_key, to_key, limit,
)
for room_id in room_ids
])
results.update(dict(res))
results.update(dict(zip(rm_ids, res)))
defer.returnValue(results)

6
synapse/util/__init__.py
View file

@ -13,7 +13,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
from synapse.util.logcontext import PreserveLoggingContext
from twisted.internet import defer, reactor, task
@ -61,10 +61,8 @@ class Clock(object):
*args: Postional arguments to pass to function.
**kwargs: Key arguments to pass to function.
"""
current_context = LoggingContext.current_context()
def wrapped_callback(*args, **kwargs):
with PreserveLoggingContext(current_context):
with PreserveLoggingContext():
callback(*args, **kwargs)
with PreserveLoggingContext():

9
synapse/util/async.py
View file

@ -16,13 +16,16 @@
from twisted.internet import defer, reactor
from .logcontext import preserve_context_over_deferred
from .logcontext import PreserveLoggingContext
@defer.inlineCallbacks
def sleep(seconds):
d = defer.Deferred()
with PreserveLoggingContext():
reactor.callLater(seconds, d.callback, seconds)
return preserve_context_over_deferred(d)
res = yield d
defer.returnValue(res)
def run_on_reactor():
@ -54,6 +57,7 @@ class ObservableDeferred(object):
object.__setattr__(self, "_result", (True, r))
while self._observers:
try:
# TODO: Handle errors here.
self._observers.pop().callback(r)
except:
pass
@ -63,6 +67,7 @@ class ObservableDeferred(object):
object.__setattr__(self, "_result", (False, f))
while self._observers:
try:
# TODO: Handle errors here.
self._observers.pop().errback(f)
except:
pass

14
synapse/util/caches/descriptors.py
View file

@ -18,6 +18,9 @@ from synapse.util.async import ObservableDeferred
from synapse.util import unwrapFirstError
from synapse.util.caches.lrucache import LruCache
from synapse.util.caches.treecache import TreeCache
from synapse.util.logcontext import (
PreserveLoggingContext, preserve_context_over_deferred, preserve_context_over_fn
)
from . import caches_by_name, DEBUG_CACHES, cache_counter
@ -190,7 +193,7 @@ class CacheDescriptor(object):
defer.returnValue(cached_result)
observer.addCallback(check_result)
return observer
return preserve_context_over_deferred(observer)
except KeyError:
# Get the sequence number of the cache before reading from the
# database so that we can tell if the cache is invalidated
@ -198,6 +201,7 @@ class CacheDescriptor(object):
sequence = self.cache.sequence
ret = defer.maybeDeferred(
preserve_context_over_fn,
self.function_to_call,
obj, *args, **kwargs
)
@ -211,7 +215,7 @@ class CacheDescriptor(object):
ret = ObservableDeferred(ret, consumeErrors=True)
self.cache.update(sequence, cache_key, ret)
return ret.observe()
return preserve_context_over_deferred(ret.observe())
wrapped.invalidate = self.cache.invalidate
wrapped.invalidate_all = self.cache.invalidate_all
@ -299,6 +303,7 @@ class CacheListDescriptor(object):
args_to_call[self.list_name] = missing
ret_d = defer.maybeDeferred(
preserve_context_over_fn,
self.function_to_call,
**args_to_call
)
@ -308,6 +313,7 @@ class CacheListDescriptor(object):
# We need to create deferreds for each arg in the list so that
# we can insert the new deferred into the cache.
for arg in missing:
with PreserveLoggingContext():
observer = ret_d.observe()
observer.addCallback(lambda r, arg: r.get(arg, None), arg)
@ -327,10 +333,10 @@ class CacheListDescriptor(object):
cached[arg] = res
return defer.gatherResults(
return preserve_context_over_deferred(defer.gatherResults(
cached.values(),
consumeErrors=True,
).addErrback(unwrapFirstError).addCallback(lambda res: dict(res))
).addErrback(unwrapFirstError).addCallback(lambda res: dict(res)))
obj.__dict__[self.orig.__name__] = wrapped

3
synapse/util/caches/snapshot_cache.py
View file

@ -87,7 +87,8 @@ class SnapshotCache(object):
# expire from the rotation of that cache.
self.next_result_cache[key] = result
self.pending_result_cache.pop(key, None)
return r
result.observe().addBoth(shuffle_along)
result.addBoth(shuffle_along)
return result.observe()

15
synapse/util/distributor.py
View file

@ -15,9 +15,7 @@
from twisted.internet import defer
from synapse.util.logcontext import (
PreserveLoggingContext, preserve_context_over_deferred,
)
from synapse.util.logcontext import PreserveLoggingContext
from synapse.util import unwrapFirstError
@ -97,6 +95,7 @@ class Signal(object):
Each observer callable may return a Deferred."""
self.observers.append(observer)
@defer.inlineCallbacks
def fire(self, *args, **kwargs):
"""Invokes every callable in the observer list, passing in the args and
kwargs. Exceptions thrown by observers are logged but ignored. It is
@ -116,6 +115,7 @@ class Signal(object):
failure.getTracebackObject()))
if not self.suppress_failures:
return failure
return defer.maybeDeferred(observer, *args, **kwargs).addErrback(eb)
with PreserveLoggingContext():
@ -124,8 +124,11 @@ class Signal(object):
for observer in self.observers
]
d = defer.gatherResults(deferreds, consumeErrors=True)
res = yield defer.gatherResults(
deferreds, consumeErrors=True
).addErrback(unwrapFirstError)
d.addErrback(unwrapFirstError)
defer.returnValue(res)
return preserve_context_over_deferred(d)
def __repr__(self):
return "<Signal name=%r>" % (self.name,)

98
synapse/util/logcontext.py
View file

@ -48,7 +48,7 @@ class LoggingContext(object):
__slots__ = [
"parent_context", "name", "usage_start", "usage_end", "main_thread",
"__dict__", "tag",
"__dict__", "tag", "alive",
]
thread_local = threading.local()
@ -88,6 +88,7 @@ class LoggingContext(object):
self.usage_start = None
self.main_thread = threading.current_thread()
self.tag = ""
self.alive = True
def __str__(self):
return "%s@%x" % (self.name, id(self))
@ -106,6 +107,7 @@ class LoggingContext(object):
The context that was previously active
"""
current = cls.current_context()
if current is not context:
current.stop()
cls.thread_local.current_context = context
@ -117,6 +119,7 @@ class LoggingContext(object):
if self.parent_context is not None:
raise Exception("Attempt to enter logging context multiple times")
self.parent_context = self.set_current_context(self)
self.alive = True
return self
def __exit__(self, type, value, traceback):
@ -136,6 +139,7 @@ class LoggingContext(object):
self
)
self.parent_context = None
self.alive = False
def __getattr__(self, name):
"""Delegate member lookup to parent context"""
@ -213,7 +217,7 @@ class PreserveLoggingContext(object):
exited. Used to restore the context after a function using
@defer.inlineCallbacks is resumed by a callback from the reactor."""
__slots__ = ["current_context", "new_context"]
__slots__ = ["current_context", "new_context", "has_parent"]
def __init__(self, new_context=LoggingContext.sentinel):
self.new_context = new_context
@ -224,11 +228,26 @@ class PreserveLoggingContext(object):
self.new_context
)
if self.current_context:
self.has_parent = self.current_context.parent_context is not None
if not self.current_context.alive:
logger.warn(
"Entering dead context: %s",
self.current_context,
)
def __exit__(self, type, value, traceback):
"""Restores the current logging context"""
LoggingContext.set_current_context(self.current_context)
context = LoggingContext.set_current_context(self.current_context)
if context != self.new_context:
logger.warn(
"Unexpected logging context: %s is not %s",
context, self.new_context,
)
if self.current_context is not LoggingContext.sentinel:
if self.current_context.parent_context is None:
if not self.current_context.alive:
logger.warn(
"Restoring dead context: %s",
self.current_context,
@ -289,3 +308,74 @@ def preserve_context_over_deferred(deferred):
d = _PreservingContextDeferred(current_context)
deferred.chainDeferred(d)
return d
def preserve_fn(f):
"""Ensures that function is called with correct context and that context is
restored after return. Useful for wrapping functions that return a deferred
which you don't yield on.
"""
current = LoggingContext.current_context()
def g(*args, **kwargs):
with PreserveLoggingContext(current):
return f(*args, **kwargs)
return g
# modules to ignore in `logcontext_tracer`
_to_ignore = [
"synapse.util.logcontext",
"synapse.http.server",
"synapse.storage._base",
"synapse.util.async",
]
def logcontext_tracer(frame, event, arg):
"""A tracer that logs whenever a logcontext "unexpectedly" changes within
a function. Probably inaccurate.
Use by calling `sys.settrace(logcontext_tracer)` in the main thread.
"""
if event == 'call':
name = frame.f_globals["__name__"]
if name.startswith("synapse"):
if name == "synapse.util.logcontext":
if frame.f_code.co_name in ["__enter__", "__exit__"]:
tracer = frame.f_back.f_trace
if tracer:
tracer.just_changed = True
tracer = frame.f_trace
if tracer:
return tracer
if not any(name.startswith(ig) for ig in _to_ignore):
return LineTracer()
class LineTracer(object):
__slots__ = ["context", "just_changed"]
def __init__(self):
self.context = LoggingContext.current_context()
self.just_changed = False
def __call__(self, frame, event, arg):
if event in 'line':
if self.just_changed:
self.context = LoggingContext.current_context()
self.just_changed = False
else:
c = LoggingContext.current_context()
if c != self.context:
logger.info(
"Context changed! %s -> %s, %s, %s",
self.context, c,
frame.f_code.co_filename, frame.f_lineno
)
self.context = c
return self

35
synapse/util/logutils.py
View file

@ -168,3 +168,38 @@ def trace_function(f):
wrapped.__name__ = func_name
return wrapped
def get_previous_frames():
s = inspect.currentframe().f_back.f_back
to_return = []
while s:
if s.f_globals["__name__"].startswith("synapse"):
filename, lineno, function, _, _ = inspect.getframeinfo(s)
args_string = inspect.formatargvalues(*inspect.getargvalues(s))
to_return.append("{{ %s:%d %s - Args: %s }}" % (
filename, lineno, function, args_string
))
s = s.f_back
return ", ". join(to_return)
def get_previous_frame(ignore=[]):
s = inspect.currentframe().f_back.f_back
while s:
if s.f_globals["__name__"].startswith("synapse"):
if not any(s.f_globals["__name__"].startswith(ig) for ig in ignore):
filename, lineno, function, _, _ = inspect.getframeinfo(s)
args_string = inspect.formatargvalues(*inspect.getargvalues(s))
return "{{ %s:%d %s - Args: %s }}" % (
filename, lineno, function, args_string
)
s = s.f_back
return None

10
synapse/util/metrics.py
View file

@ -68,16 +68,18 @@ class Measure(object):
block_timer.inc_by(duration, self.name)
context = LoggingContext.current_context()
if not context:
return
if context != self.start_context:
logger.warn(
"Context have unexpectedly changed %r, %r",
context, self.start_context
"Context have unexpectedly changed from '%s' to '%s'. (%r)",
context, self.start_context, self.name
)
return
if not context:
logger.warn("Expected context. (%r)", self.name)
return
ru_utime, ru_stime = context.get_resource_usage()
block_ru_utime.inc_by(ru_utime, self.name)

3
synapse/util/ratelimitutils.py
View file

@ -18,6 +18,7 @@ from twisted.internet import defer
from synapse.api.errors import LimitExceededError
from synapse.util.async import sleep
from synapse.util.logcontext import preserve_fn
import collections
import contextlib
@ -163,7 +164,7 @@ class _PerHostRatelimiter(object):
"Ratelimit [%s]: sleeping req",
id(request_id),
)
ret_defer = sleep(self.sleep_msec / 1000.0)
ret_defer = preserve_fn(sleep)(self.sleep_msec / 1000.0)
self.sleeping_requests.add(request_id)