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Avoid reraise, to improve stacktraces

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This commit is contained in:
Richard van der Hoff 2018-10-01 18:48:51 +01:00
parent abdc141c2b
commit 8174c6725b
3 changed files with 24 additions and 22 deletions
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1
changelog.d/3989.misc Normal file
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@ -0,0 +1 @@
Improve stacktraces in certain exceptions in the logs

20
synapse/handlers/federation.py
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@ -18,7 +18,6 @@
import itertools import itertools
import logging import logging
import sys
import six import six
from six import iteritems, itervalues from six import iteritems, itervalues
@ -1602,6 +1601,9 @@ class FederationHandler(BaseHandler):
auth_events=auth_events, auth_events=auth_events,
) )
# reraise does not allow inlineCallbacks to preserve the stacktrace, so we
# hack around with a try/finally instead.
success = False
try: try:
if not event.internal_metadata.is_outlier() and not backfilled: if not event.internal_metadata.is_outlier() and not backfilled:
yield self.action_generator.handle_push_actions_for_event( yield self.action_generator.handle_push_actions_for_event(
@ -1612,15 +1614,13 @@ class FederationHandler(BaseHandler):
[(event, context)], [(event, context)],
backfilled=backfilled, backfilled=backfilled,
) )
except: # noqa: E722, as we reraise the exception this is fine. success = True
tp, value, tb = sys.exc_info() finally:
if not success:
logcontext.run_in_background( logcontext.run_in_background(
self.store.remove_push_actions_from_staging, self.store.remove_push_actions_from_staging,
event.event_id, event.event_id,
) )
six.reraise(tp, value, tb)
defer.returnValue(context) defer.returnValue(context)

25
synapse/handlers/message.py
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@ -14,9 +14,7 @@
# See the License for the specific language governing permissions and # See the License for the specific language governing permissions and
# limitations under the License. # limitations under the License.
import logging import logging
import sys
import six
from six import iteritems, itervalues, string_types from six import iteritems, itervalues, string_types
from canonicaljson import encode_canonical_json, json from canonicaljson import encode_canonical_json, json
@ -624,6 +622,9 @@ class EventCreationHandler(object):
event, context event, context
) )
# reraise does not allow inlineCallbacks to preserve the stacktrace, so we
# hack around with a try/finally instead.
success = False
try: try:
# If we're a worker we need to hit out to the master. # If we're a worker we need to hit out to the master.
if self.config.worker_app: if self.config.worker_app:
@ -636,6 +637,7 @@ class EventCreationHandler(object):
ratelimit=ratelimit, ratelimit=ratelimit,
extra_users=extra_users, extra_users=extra_users,
) )
success = True
return return
yield self.persist_and_notify_client_event( yield self.persist_and_notify_client_event(
@ -645,17 +647,16 @@ class EventCreationHandler(object):
ratelimit=ratelimit, ratelimit=ratelimit,
extra_users=extra_users, extra_users=extra_users,
) )
except: # noqa: E722, as we reraise the exception this is fine.
# Ensure that we actually remove the entries in the push actions
# staging area, if we calculated them.
tp, value, tb = sys.exc_info()
run_in_background( success = True
self.store.remove_push_actions_from_staging, finally:
event.event_id, if not success:
) # Ensure that we actually remove the entries in the push actions
# staging area, if we calculated them.
six.reraise(tp, value, tb) run_in_background(
self.store.remove_push_actions_from_staging,
event.event_id,
)
@defer.inlineCallbacks @defer.inlineCallbacks
def persist_and_notify_client_event( def persist_and_notify_client_event(