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authorRichard van der Hoff <1389908+richvdh@users.noreply.github.com>2019-05-21 13:47:25 +0100
committerGitHub <noreply@github.com>2019-05-21 13:47:25 +0100
commit04d53794d6848cca2567d67f494ba8405d0bf1cf (patch)
tree87512338fea4a3a1ba714060a472da88e169d4e4 /synapse/federation/federation_server.py
parentRevert "expose SlavedProfileStore to ClientReaderSlavedStore (#5200)" (diff)
downloadsynapse-04d53794d6848cca2567d67f494ba8405d0bf1cf.tar.xz
Fix error handling for rooms whose versions are unknown. (#5219)
If we remove support for a particular room version, we should behave more
gracefully. This should make client requests fail with a 400 rather than a 500,
and will ignore individiual PDUs in a federation transaction, rather than the
whole transaction.
Diffstat (limited to 'synapse/federation/federation_server.py')
-rw-r--r--synapse/federation/federation_server.py14
1 files changed, 13 insertions, 1 deletions
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index df60828dba..4c28c1dc3c 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -33,6 +33,7 @@ from synapse.api.errors import (
     IncompatibleRoomVersionError,
     NotFoundError,
     SynapseError,
+    UnsupportedRoomVersionError,
 )
 from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
 from synapse.crypto.event_signing import compute_event_signature
@@ -198,11 +199,22 @@ class FederationServer(FederationBase):
 
             try:
                 room_version = yield self.store.get_room_version(room_id)
-                format_ver = room_version_to_event_format(room_version)
             except NotFoundError:
                 logger.info("Ignoring PDU for unknown room_id: %s", room_id)
                 continue
 
+            try:
+                format_ver = room_version_to_event_format(room_version)
+            except UnsupportedRoomVersionError:
+                # this can happen if support for a given room version is withdrawn,
+                # so that we still get events for said room.
+                logger.info(
+                    "Ignoring PDU for room %s with unknown version %s",
+                    room_id,
+                    room_version,
+                )
+                continue
+
             event = event_from_pdu_json(p, format_ver)
             pdus_by_room.setdefault(room_id, []).append(event)