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Merge pull request #4075 from matrix-org/rav/fix_pusher_logcontexts

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Clean up the way logcontexts and threads work in the pushers
This commit is contained in:
Richard van der Hoff 2018-10-24 09:53:57 +01:00 committed by GitHub
commit e0b9d5f0af
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8 changed files with 142 additions and 141 deletions
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1
changelog.d/4075.misc Normal file
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@ -0,0 +1 @@
Clean up threading and logcontexts in pushers

6
synapse/app/pusher.py
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@ -161,11 +161,11 @@ class PusherReplicationHandler(ReplicationClientHandler):
else:
yield self.start_pusher(row.user_id, row.app_id, row.pushkey)
elif stream_name == "events":
self.pusher_pool.on_new_notifications(
yield self.pusher_pool.on_new_notifications(
token, token,
)
elif stream_name == "receipts":
self.pusher_pool.on_new_receipts(
yield self.pusher_pool.on_new_receipts(
token, token, set(row.room_id for row in rows)
)
except Exception:
@ -183,7 +183,7 @@ class PusherReplicationHandler(ReplicationClientHandler):
def start_pusher(self, user_id, app_id, pushkey):
key = "%s:%s" % (app_id, pushkey)
logger.info("Starting pusher %r / %r", user_id, key)
return self.pusher_pool._refresh_pusher(app_id, pushkey, user_id)
return self.pusher_pool.start_pusher_by_id(app_id, pushkey, user_id)
def start(config_options):

4
synapse/handlers/federation.py
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@ -2520,7 +2520,7 @@ class FederationHandler(BaseHandler):
if not backfilled: # Never notify for backfilled events
for event, _ in event_and_contexts:
self._notify_persisted_event(event, max_stream_id)
yield self._notify_persisted_event(event, max_stream_id)
def _notify_persisted_event(self, event, max_stream_id):
"""Checks to see if notifier/pushers should be notified about the
@ -2553,7 +2553,7 @@ class FederationHandler(BaseHandler):
extra_users=extra_users
)
self.pusher_pool.on_new_notifications(
return self.pusher_pool.on_new_notifications(
event_stream_id, max_stream_id,
)

2
synapse/handlers/message.py
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@ -779,7 +779,7 @@ class EventCreationHandler(object):
event, context=context
)
self.pusher_pool.on_new_notifications(
yield self.pusher_pool.on_new_notifications(
event_stream_id, max_stream_id,
)

2
synapse/handlers/receipts.py
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@ -119,7 +119,7 @@ class ReceiptsHandler(BaseHandler):
"receipt_key", max_batch_id, rooms=affected_room_ids
)
# Note that the min here shouldn't be relied upon to be accurate.
self.hs.get_pusherpool().on_new_receipts(
yield self.hs.get_pusherpool().on_new_receipts(
min_batch_id, max_batch_id, affected_room_ids,
)

67
synapse/push/emailpusher.py
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@ -18,8 +18,7 @@ import logging
from twisted.internet import defer
from twisted.internet.error import AlreadyCalled, AlreadyCancelled
from synapse.util.logcontext import LoggingContext
from synapse.util.metrics import Measure
from synapse.metrics.background_process_metrics import run_as_background_process
logger = logging.getLogger(__name__)
@ -71,18 +70,11 @@ class EmailPusher(object):
# See httppusher
self.max_stream_ordering = None
self.processing = False
self._is_processing = False
@defer.inlineCallbacks
def on_started(self):
if self.mailer is not None:
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")
self._start_processing()
def on_stop(self):
if self.timed_call:
@ -92,43 +84,52 @@ class EmailPusher(object):
pass
self.timed_call = None
@defer.inlineCallbacks
def on_new_notifications(self, min_stream_ordering, max_stream_ordering):
self.max_stream_ordering = max(max_stream_ordering, self.max_stream_ordering)
yield self._process()
self._start_processing()
def on_new_receipts(self, min_stream_id, max_stream_id):
# We could wake up and cancel the timer but there tend to be quite a
# lot of read receipts so it's probably less work to just let the
# timer fire
return defer.succeed(None)
pass
@defer.inlineCallbacks
def on_timer(self):
self.timed_call = None
yield self._process()
self._start_processing()
def _start_processing(self):
if self._is_processing:
return
run_as_background_process("emailpush.process", self._process)
@defer.inlineCallbacks
def _process(self):
if self.processing:
return
# we should never get here if we are already processing
assert not self._is_processing
with LoggingContext("emailpush._process"):
with Measure(self.clock, "emailpush._process"):
try:
self._is_processing = True
if self.throttle_params is None:
# this is our first loop: load up the throttle params
self.throttle_params = yield self.store.get_throttle_params_by_room(
self.pusher_id
)
# if the max ordering changes while we're running _unsafe_process,
# call it again, and so on until we've caught up.
while True:
starting_max_ordering = self.max_stream_ordering
try:
self.processing = True
# if the max ordering changes while we're running _unsafe_process,
# call it again, and so on until we've caught up.
while True:
starting_max_ordering = self.max_stream_ordering
try:
yield self._unsafe_process()
except Exception:
logger.exception("Exception processing notifs")
if self.max_stream_ordering == starting_max_ordering:
break
finally:
self.processing = False
yield self._unsafe_process()
except Exception:
logger.exception("Exception processing notifs")
if self.max_stream_ordering == starting_max_ordering:
break
finally:
self._is_processing = False
@defer.inlineCallbacks
def _unsafe_process(self):

68
synapse/push/httppusher.py
View File

@ -22,9 +22,8 @@ from prometheus_client import Counter
from twisted.internet import defer
from twisted.internet.error import AlreadyCalled, AlreadyCancelled
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.push import PusherConfigException
from synapse.util.logcontext import LoggingContext
from synapse.util.metrics import Measure
from . import push_rule_evaluator, push_tools
@ -61,7 +60,7 @@ class HttpPusher(object):
self.backoff_delay = HttpPusher.INITIAL_BACKOFF_SEC
self.failing_since = pusherdict['failing_since']
self.timed_call = None
self.processing = False
self._is_processing = False
# This is the highest stream ordering we know it's safe to process.
# When new events arrive, we'll be given a window of new events: we
@ -92,34 +91,27 @@ class HttpPusher(object):
self.data_minus_url.update(self.data)
del self.data_minus_url['url']
@defer.inlineCallbacks
def on_started(self):
try:
yield self._process()
except Exception:
logger.exception("Error starting http pusher")
self._start_processing()
@defer.inlineCallbacks
def on_new_notifications(self, min_stream_ordering, max_stream_ordering):
self.max_stream_ordering = max(max_stream_ordering, self.max_stream_ordering or 0)
yield self._process()
self._start_processing()
@defer.inlineCallbacks
def on_new_receipts(self, min_stream_id, max_stream_id):
# Note that the min here shouldn't be relied upon to be accurate.
# We could check the receipts are actually m.read receipts here,
# but currently that's the only type of receipt anyway...
with LoggingContext("push.on_new_receipts"):
with Measure(self.clock, "push.on_new_receipts"):
badge = yield push_tools.get_badge_count(
self.hs.get_datastore(), self.user_id
)
yield self._send_badge(badge)
run_as_background_process("http_pusher.on_new_receipts", self._update_badge)
@defer.inlineCallbacks
def _update_badge(self):
badge = yield push_tools.get_badge_count(self.hs.get_datastore(), self.user_id)
yield self._send_badge(badge)
def on_timer(self):
yield self._process()
self._start_processing()
def on_stop(self):
if self.timed_call:
@ -129,27 +121,31 @@ class HttpPusher(object):
pass
self.timed_call = None
@defer.inlineCallbacks
def _process(self):
if self.processing:
def _start_processing(self):
if self._is_processing:
return
with LoggingContext("push._process"):
with Measure(self.clock, "push._process"):
run_as_background_process("httppush.process", self._process)
@defer.inlineCallbacks
def _process(self):
# we should never get here if we are already processing
assert not self._is_processing
try:
self._is_processing = True
# if the max ordering changes while we're running _unsafe_process,
# call it again, and so on until we've caught up.
while True:
starting_max_ordering = self.max_stream_ordering
try:
self.processing = True
# if the max ordering changes while we're running _unsafe_process,
# call it again, and so on until we've caught up.
while True:
starting_max_ordering = self.max_stream_ordering
try:
yield self._unsafe_process()
except Exception:
logger.exception("Exception processing notifs")
if self.max_stream_ordering == starting_max_ordering:
break
finally:
self.processing = False
yield self._unsafe_process()
except Exception:
logger.exception("Exception processing notifs")
if self.max_stream_ordering == starting_max_ordering:
break
finally:
self._is_processing = False
@defer.inlineCallbacks
def _unsafe_process(self):

133
synapse/push/pusherpool.py
View File

@ -20,24 +20,39 @@ from twisted.internet import defer
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.push.pusher import PusherFactory
from synapse.util.logcontext import make_deferred_yieldable, run_in_background
logger = logging.getLogger(__name__)
class PusherPool:
"""
The pusher pool. This is responsible for dispatching notifications of new events to
the http and email pushers.
It provides three methods which are designed to be called by the rest of the
application: `start`, `on_new_notifications`, and `on_new_receipts`: each of these
delegates to each of the relevant pushers.
Note that it is expected that each pusher will have its own 'processing' loop which
will send out the notifications in the background, rather than blocking until the
notifications are sent; accordingly Pusher.on_started, Pusher.on_new_notifications and
Pusher.on_new_receipts are not expected to return deferreds.
"""
def __init__(self, _hs):
self.hs = _hs
self.pusher_factory = PusherFactory(_hs)
self.start_pushers = _hs.config.start_pushers
self._should_start_pushers = _hs.config.start_pushers
self.store = self.hs.get_datastore()
self.clock = self.hs.get_clock()
self.pushers = {}
@defer.inlineCallbacks
def start(self):
pushers = yield self.store.get_all_pushers()
self._start_pushers(pushers)
"""Starts the pushers off in a background process.
"""
if not self._should_start_pushers:
logger.info("Not starting pushers because they are disabled in the config")
return
run_as_background_process("start_pushers", self._start_pushers)
@defer.inlineCallbacks
def add_pusher(self, user_id, access_token, kind, app_id,
@ -86,7 +101,7 @@ class PusherPool:
last_stream_ordering=last_stream_ordering,
profile_tag=profile_tag,
)
yield self._refresh_pusher(app_id, pushkey, user_id)
yield self.start_pusher_by_id(app_id, pushkey, user_id)
@defer.inlineCallbacks
def remove_pushers_by_app_id_and_pushkey_not_user(self, app_id, pushkey,
@ -123,45 +138,23 @@ class PusherPool:
p['app_id'], p['pushkey'], p['user_name'],
)
def on_new_notifications(self, min_stream_id, max_stream_id):
run_as_background_process(
"on_new_notifications",
self._on_new_notifications, min_stream_id, max_stream_id,
)
@defer.inlineCallbacks
def _on_new_notifications(self, min_stream_id, max_stream_id):
def on_new_notifications(self, min_stream_id, max_stream_id):
try:
users_affected = yield self.store.get_push_action_users_in_range(
min_stream_id, max_stream_id
)
deferreds = []
for u in users_affected:
if u in self.pushers:
for p in self.pushers[u].values():
deferreds.append(
run_in_background(
p.on_new_notifications,
min_stream_id, max_stream_id,
)
)
p.on_new_notifications(min_stream_id, max_stream_id)
yield make_deferred_yieldable(
defer.gatherResults(deferreds, consumeErrors=True),
)
except Exception:
logger.exception("Exception in pusher on_new_notifications")
def on_new_receipts(self, min_stream_id, max_stream_id, affected_room_ids):
run_as_background_process(
"on_new_receipts",
self._on_new_receipts, min_stream_id, max_stream_id, affected_room_ids,
)
@defer.inlineCallbacks
def _on_new_receipts(self, min_stream_id, max_stream_id, affected_room_ids):
def on_new_receipts(self, min_stream_id, max_stream_id, affected_room_ids):
try:
# Need to subtract 1 from the minimum because the lower bound here
# is not inclusive
@ -171,26 +164,20 @@ class PusherPool:
# This returns a tuple, user_id is at index 3
users_affected = set([r[3] for r in updated_receipts])
deferreds = []
for u in users_affected:
if u in self.pushers:
for p in self.pushers[u].values():
deferreds.append(
run_in_background(
p.on_new_receipts,
min_stream_id, max_stream_id,
)
)
p.on_new_receipts(min_stream_id, max_stream_id)
yield make_deferred_yieldable(
defer.gatherResults(deferreds, consumeErrors=True),
)
except Exception:
logger.exception("Exception in pusher on_new_receipts")
@defer.inlineCallbacks
def _refresh_pusher(self, app_id, pushkey, user_id):
def start_pusher_by_id(self, app_id, pushkey, user_id):
"""Look up the details for the given pusher, and start it"""
if not self._should_start_pushers:
return
resultlist = yield self.store.get_pushers_by_app_id_and_pushkey(
app_id, pushkey
)
@ -201,34 +188,50 @@ class PusherPool:
p = r
if p:
self._start_pusher(p)
self._start_pushers([p])
@defer.inlineCallbacks
def _start_pushers(self):
"""Start all the pushers
def _start_pushers(self, pushers):
if not self.start_pushers:
logger.info("Not starting pushers because they are disabled in the config")
return
Returns:
Deferred
"""
pushers = yield self.store.get_all_pushers()
logger.info("Starting %d pushers", len(pushers))
for pusherdict in pushers:
try:
p = self.pusher_factory.create_pusher(pusherdict)
except Exception:
logger.exception("Couldn't start a pusher: caught Exception")
continue
if p:
appid_pushkey = "%s:%s" % (
pusherdict['app_id'],
pusherdict['pushkey'],
)
byuser = self.pushers.setdefault(pusherdict['user_name'], {})
if appid_pushkey in byuser:
byuser[appid_pushkey].on_stop()
byuser[appid_pushkey] = p
run_in_background(p.on_started)
self._start_pusher(pusherdict)
logger.info("Started pushers")
def _start_pusher(self, pusherdict):
"""Start the given pusher
Args:
pusherdict (dict):
Returns:
None
"""
try:
p = self.pusher_factory.create_pusher(pusherdict)
except Exception:
logger.exception("Couldn't start a pusher: caught Exception")
return
if not p:
return
appid_pushkey = "%s:%s" % (
pusherdict['app_id'],
pusherdict['pushkey'],
)
byuser = self.pushers.setdefault(pusherdict['user_name'], {})
if appid_pushkey in byuser:
byuser[appid_pushkey].on_stop()
byuser[appid_pushkey] = p
p.on_started()
@defer.inlineCallbacks
def remove_pusher(self, app_id, pushkey, user_id):
appid_pushkey = "%s:%s" % (app_id, pushkey)