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-rw-r--r--synapse/app/federation_reader.py2
-rw-r--r--synapse/crypto/keyring.py4
-rw-r--r--synapse/groups/attestations.py7
-rw-r--r--synapse/handlers/_base.py2
-rw-r--r--synapse/handlers/device.py14
-rw-r--r--synapse/handlers/groups_local.py12
-rw-r--r--synapse/http/server.py6
-rw-r--r--synapse/rest/well_known.py3
8 files changed, 35 insertions, 15 deletions
diff --git a/synapse/app/federation_reader.py b/synapse/app/federation_reader.py
index 6ee2b76dcd..b116c17669 100644
--- a/synapse/app/federation_reader.py
+++ b/synapse/app/federation_reader.py
@@ -40,6 +40,7 @@ from synapse.replication.slave.storage.profile import SlavedProfileStore
 from synapse.replication.slave.storage.push_rule import SlavedPushRuleStore
 from synapse.replication.slave.storage.pushers import SlavedPusherStore
 from synapse.replication.slave.storage.receipts import SlavedReceiptsStore
+from synapse.replication.slave.storage.registration import SlavedRegistrationStore
 from synapse.replication.slave.storage.room import RoomStore
 from synapse.replication.slave.storage.transactions import SlavedTransactionStore
 from synapse.replication.tcp.client import ReplicationClientHandler
@@ -62,6 +63,7 @@ class FederationReaderSlavedStore(
     SlavedReceiptsStore,
     SlavedEventStore,
     SlavedKeyStore,
+    SlavedRegistrationStore,
     RoomStore,
     DirectoryStore,
     SlavedTransactionStore,
diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py
index 3a96980bed..cce40fdd2d 100644
--- a/synapse/crypto/keyring.py
+++ b/synapse/crypto/keyring.py
@@ -35,7 +35,7 @@ from unpaddedbase64 import decode_base64
 
 from twisted.internet import defer
 
-from synapse.api.errors import Codes, SynapseError
+from synapse.api.errors import Codes, RequestSendFailed, SynapseError
 from synapse.util import logcontext, unwrapFirstError
 from synapse.util.logcontext import (
     LoggingContext,
@@ -656,7 +656,7 @@ def _handle_key_deferred(verify_request):
     try:
         with PreserveLoggingContext():
             _, key_id, verify_key = yield verify_request.deferred
-    except IOError as e:
+    except (IOError, RequestSendFailed) as e:
         logger.warn(
             "Got IOError when downloading keys for %s: %s %s",
             server_name, type(e).__name__, str(e),
diff --git a/synapse/groups/attestations.py b/synapse/groups/attestations.py
index b04f4234ca..786149be65 100644
--- a/synapse/groups/attestations.py
+++ b/synapse/groups/attestations.py
@@ -42,7 +42,7 @@ from signedjson.sign import sign_json
 
 from twisted.internet import defer
 
-from synapse.api.errors import SynapseError
+from synapse.api.errors import RequestSendFailed, SynapseError
 from synapse.metrics.background_process_metrics import run_as_background_process
 from synapse.types import get_domain_from_id
 from synapse.util.logcontext import run_in_background
@@ -191,6 +191,11 @@ class GroupAttestionRenewer(object):
                 yield self.store.update_attestation_renewal(
                     group_id, user_id, attestation
                 )
+            except RequestSendFailed as e:
+                logger.warning(
+                    "Failed to renew attestation of %r in %r: %s",
+                    user_id, group_id, e,
+                )
             except Exception:
                 logger.exception("Error renewing attestation of %r in %r",
                                  user_id, group_id)
diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py
index 704181d2d3..594754cfd8 100644
--- a/synapse/handlers/_base.py
+++ b/synapse/handlers/_base.py
@@ -167,4 +167,4 @@ class BaseHandler(object):
                     ratelimit=False,
                 )
             except Exception as e:
-                logger.warn("Error kicking guest user: %s" % (e,))
+                logger.exception("Error kicking guest user: %s" % (e,))
diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py
index 8955cde4ed..c708c35d4d 100644
--- a/synapse/handlers/device.py
+++ b/synapse/handlers/device.py
@@ -20,7 +20,11 @@ from twisted.internet import defer
 
 from synapse.api import errors
 from synapse.api.constants import EventTypes
-from synapse.api.errors import FederationDeniedError
+from synapse.api.errors import (
+    FederationDeniedError,
+    HttpResponseException,
+    RequestSendFailed,
+)
 from synapse.types import RoomStreamToken, get_domain_from_id
 from synapse.util import stringutils
 from synapse.util.async_helpers import Linearizer
@@ -504,13 +508,13 @@ class DeviceListEduUpdater(object):
                 origin = get_domain_from_id(user_id)
                 try:
                     result = yield self.federation.query_user_devices(origin, user_id)
-                except NotRetryingDestination:
+                except (
+                    NotRetryingDestination, RequestSendFailed, HttpResponseException,
+                ):
                     # TODO: Remember that we are now out of sync and try again
                     # later
                     logger.warn(
-                        "Failed to handle device list update for %s,"
-                        " we're not retrying the remote",
-                        user_id,
+                        "Failed to handle device list update for %s", user_id,
                     )
                     # We abort on exceptions rather than accepting the update
                     # as otherwise synapse will 'forget' that its device list
diff --git a/synapse/handlers/groups_local.py b/synapse/handlers/groups_local.py
index 173315af6c..02c508acec 100644
--- a/synapse/handlers/groups_local.py
+++ b/synapse/handlers/groups_local.py
@@ -20,7 +20,7 @@ from six import iteritems
 
 from twisted.internet import defer
 
-from synapse.api.errors import HttpResponseException, SynapseError
+from synapse.api.errors import HttpResponseException, RequestSendFailed, SynapseError
 from synapse.types import get_domain_from_id
 
 logger = logging.getLogger(__name__)
@@ -46,13 +46,19 @@ def _create_rerouter(func_name):
             # when the remote end responds with things like 403 Not
             # In Group, we can communicate that to the client instead
             # of a 500.
-            def h(failure):
+            def http_response_errback(failure):
                 failure.trap(HttpResponseException)
                 e = failure.value
                 if e.code == 403:
                     raise e.to_synapse_error()
                 return failure
-            d.addErrback(h)
+
+            def request_failed_errback(failure):
+                failure.trap(RequestSendFailed)
+                raise SynapseError(502, "Failed to contact group server")
+
+            d.addErrback(http_response_errback)
+            d.addErrback(request_failed_errback)
             return d
     return f
 
diff --git a/synapse/http/server.py b/synapse/http/server.py
index 6a427d96a6..6c67a25a11 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -106,10 +106,10 @@ def wrap_json_request_handler(h):
             # trace.
             f = failure.Failure()
             logger.error(
-                "Failed handle request via %r: %r: %s",
-                h,
+                "Failed handle request via %r: %r",
+                request.request_metrics.name,
                 request,
-                f.getTraceback().rstrip(),
+                exc_info=(f.type, f.value, f.getTracebackObject()),
             )
             # Only respond with an error response if we haven't already started
             # writing, otherwise lets just kill the connection
diff --git a/synapse/rest/well_known.py b/synapse/rest/well_known.py
index 6e043d6162..c0a4ae93e5 100644
--- a/synapse/rest/well_known.py
+++ b/synapse/rest/well_known.py
@@ -18,6 +18,8 @@ import logging
 
 from twisted.web.resource import Resource
 
+from synapse.http.server import set_cors_headers
+
 logger = logging.getLogger(__name__)
 
 
@@ -59,6 +61,7 @@ class WellKnownResource(Resource):
         self._well_known_builder = WellKnownBuilder(hs)
 
     def render_GET(self, request):
+        set_cors_headers(request)
         r = self._well_known_builder.get_well_known()
         if not r:
             request.setResponseCode(404)