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Don't fail all of an iteration of the device list retry loop on error (#7609)

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Without this patch, if an error happens which isn't caught by `user_device_resync`, then `_maybe_retry_device_resync` would fail, without retrying the next users in the iteration. This patch fixes this so that it now only logs an error in this case.
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Brendan Abolivier 2020-06-01 12:55:14 +02:00 committed by GitHub
parent 2dc430d36e
commit c1bdd4fac7
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2 changed files with 22 additions and 15 deletions
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changelog.d/7609.bugfix Normal file
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@ -0,0 +1 @@
Prevent an entire iteration of the device list resync loop from failing if one server responds with a malformed result.

36
synapse/handlers/device.py
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@ -704,22 +704,27 @@ class DeviceListUpdater(object):
need_resync = yield self.store.get_user_ids_requiring_device_list_resync()
# Iterate over the set of user IDs.
for user_id in need_resync:
# Try to resync the current user's devices list. Exception handling
# isn't necessary here, since user_device_resync catches all instances
# of "Exception" that might be raised from the federation request. This
# means that if an exception is raised by this function, it must be
# because of a database issue, which means _maybe_retry_device_resync
# probably won't be able to go much further anyway.
result = yield self.user_device_resync(
user_id=user_id, mark_failed_as_stale=False,
)
# user_device_resync only returns a result if it managed to successfully
# resync and update the database. Updating the table of users requiring
# resync isn't necessary here as user_device_resync already does it
# (through self.store.update_remote_device_list_cache).
if result:
try:
# Try to resync the current user's devices list.
result = yield self.user_device_resync(
user_id=user_id, mark_failed_as_stale=False,
)
# user_device_resync only returns a result if it managed to
# successfully resync and update the database. Updating the table
# of users requiring resync isn't necessary here as
# user_device_resync already does it (through
# self.store.update_remote_device_list_cache).
if result:
logger.debug(
"Successfully resynced the device list for %s", user_id,
)
except Exception as e:
# If there was an issue resyncing this user, e.g. if the remote
# server sent a malformed result, just log the error instead of
# aborting all the subsequent resyncs.
logger.debug(
"Successfully resynced the device list for %s" % user_id,
"Could not resync the device list for %s: %s", user_id, e,
)
finally:
# Allow future calls to retry resyncinc out of sync device lists.
@ -738,6 +743,7 @@ class DeviceListUpdater(object):
request:
https://matrix.org/docs/spec/server_server/r0.1.2#get-matrix-federation-v1-user-devices-userid
"""
logger.debug("Attempting to resync the device list for %s", user_id)
log_kv({"message": "Doing resync to update device list."})
# Fetch all devices for the user.
origin = get_domain_from_id(user_id)