2019-12-30 17:33:07,540 - synapse.http.server - 109 - ERROR - GET-18029- Failed handle request via 'SyncRestServlet': <SynapseRequest at 0x7f272183c5f8 method='GET' uri='/_matrix/client/r0/sync?filter=7&timeout=...
Traceback (most recent call last):
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
StopIteration: {}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
StopIteration: {}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
StopIteration: {}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
StopIteration: []

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
StopIteration: {}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/http/server.py", line 77, in wrapped_request_handler
    await h(self, request)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/http/server.py", line 326, in _async_render
    callback_return = await callback_return
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/rest/client/v2_alpha/sync.py", line 178, in on_GET
    full_state=full_state,
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/handlers/sync.py", line 263, in wait_for_sync_for_user
    full_state,
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/handlers/sync.py", line 285, in _wait_for_sync_for_user
    sync_config, since_token, full_state=full_state
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/handlers/sync.py", line 956, in generate_sync_result
    sync_result_builder, account_data_by_room
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/handlers/sync.py", line 1367, in _generate_sync_entry_for_rooms
    await concurrently_execute(handle_room_entries, room_entries, 10)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/util/async_helpers.py", line 155, in _concurrently_execute_inner
    await maybe_awaitable(func(next(it)))
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/handlers/sync.py", line 1762, in _generate_room_entry
    newly_joined_room=newly_joined,
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/handlers/sync.py", line 413, in _load_filtered_recents
    current_state_ids = await self.state.get_current_state_ids(room_id)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/state/__init__.py", line 171, in get_current_state_ids
    ret = yield self.resolve_state_groups_for_events(room_id, latest_event_ids)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/util/metrics.py", line 82, in measured_func
    r = yield func(self, *args, **kwargs)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/state/__init__.py", line 402, in resolve_state_groups_for_events
    state_res_store=StateResolutionStore(self.store),
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/state/__init__.py", line 525, in resolve_state_groups
    state_res_store=state_res_store,
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/state/v2.py", line 116, in resolve_events_with_store
    room_id, power_events, event_map, state_res_store, full_conflicted_set
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/state/v2.py", line 364, in _reverse_topological_power_sort
    room_id, event_id, event_map, state_res_store
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1416, in _inlineCallbacks
    result = result.throwExceptionIntoGenerator(g)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/python/failure.py", line 512, in throwExceptionIntoGenerator
    return g.throw(self.type, self.value, self.tb)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/state/v2.py", line 186, in _get_power_level_for_sender
    aev = yield _get_event(room_id, aid, event_map, state_res_store)
  File "/home/synapse/env/lib/python3.6/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
  File "/home/synapse/env/lib/python3.6/site-packages/synapse/state/v2.py", line 535, in _get_event
    event = event_map[event_id]
KeyError: '$S38_aRG4Qz8eIdrTyzJuQdH3Ieus1Y1dhczoFKnOB7M'
2019-12-30 17:33:07,544 - synapse.access.http.9183 - 302 - INFO - GET-18029- 127.0.0.1 - 9183 - {@andrewm:amorgan.xyz} Processed request: 16.942sec/0.001sec (6.428sec, 0.142sec) (9.334sec/43.300sec/259) 55B 500