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reraise exceptions more carefully

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We need to be careful (under python 2, at least) that when we reraise an
exception after doing some error handling, we actually reraise the original
exception rather than anything that might have been raised (and handled) during
the error handling.
This commit is contained in:
Richard van der Hoff 2018-04-27 11:40:06 +01:00
parent 0ced8b5b47
commit 6493b22b42
2 changed files with 24 additions and 13 deletions
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16
synapse/handlers/federation.py
View File

@ -19,9 +19,11 @@
import httplib import httplib
import itertools import itertools
import logging import logging
import sys
from signedjson.key import decode_verify_key_bytes from signedjson.key import decode_verify_key_bytes
from signedjson.sign import verify_signed_json from signedjson.sign import verify_signed_json
import six
from twisted.internet import defer from twisted.internet import defer
from unpaddedbase64 import decode_base64 from unpaddedbase64 import decode_base64
@ -1513,12 +1515,14 @@ class FederationHandler(BaseHandler):
backfilled=backfilled, backfilled=backfilled,
) )
except: # noqa: E722, as we reraise the exception this is fine. except: # noqa: E722, as we reraise the exception this is fine.
# Ensure that we actually remove the entries in the push actions tp, value, tb = sys.exc_info()
# staging area
logcontext.preserve_fn( logcontext.run_in_background(
self.store.remove_push_actions_from_staging self.store.remove_push_actions_from_staging,
)(event.event_id) event.event_id,
raise )
six.reraise(tp, value, tb)
if not backfilled: if not backfilled:
# this intentionally does not yield: we don't care about the result # this intentionally does not yield: we don't care about the result

21
synapse/handlers/message.py
View File

@ -13,6 +13,12 @@
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# 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 simplejson
import sys
from canonicaljson import encode_canonical_json
import six
from twisted.internet import defer, reactor from twisted.internet import defer, reactor
from twisted.python.failure import Failure from twisted.python.failure import Failure
@ -34,11 +40,6 @@ from synapse.replication.http.send_event import send_event_to_master
from ._base import BaseHandler from ._base import BaseHandler
from canonicaljson import encode_canonical_json
import logging
import simplejson
logger = logging.getLogger(__name__) logger = logging.getLogger(__name__)
@ -729,8 +730,14 @@ class EventCreationHandler(object):
except: # noqa: E722, as we reraise the exception this is fine. except: # noqa: E722, as we reraise the exception this is fine.
# Ensure that we actually remove the entries in the push actions # Ensure that we actually remove the entries in the push actions
# staging area, if we calculated them. # staging area, if we calculated them.
preserve_fn(self.store.remove_push_actions_from_staging)(event.event_id) tp, value, tb = sys.exc_info()
raise
run_in_background(
self.store.remove_push_actions_from_staging,
event.event_id,
)
six.reraise(tp, value, tb)
@defer.inlineCallbacks @defer.inlineCallbacks
def persist_and_notify_client_event( def persist_and_notify_client_event(