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Fix exceptions from background database update for event labels. (#6407)

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Add some exception handling here so that events whose json cannot be parsed are
ignored rather than getting us stuck in a loop.

Fixes #6404.
This commit is contained in:
Richard van der Hoff 2019-11-25 13:26:59 +00:00 committed by GitHub
parent 41e4566682
commit b7367c339d
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2 changed files with 25 additions and 17 deletions
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changelog.d/6407.bugfix Normal file
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@ -0,0 +1 @@
Fix a bug which could cause the background database update hander for event labels to get stuck in a loop raising exceptions.

41
synapse/storage/data_stores/main/events_bg_updates.py
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@ -530,24 +530,31 @@ class EventsBackgroundUpdatesStore(BackgroundUpdateStore):
nbrows = 0
last_row_event_id = ""
for (event_id, event_json_raw) in results:
event_json = json.loads(event_json_raw)
try:
event_json = json.loads(event_json_raw)
self._simple_insert_many_txn(
txn=txn,
table="event_labels",
values=[
{
"event_id": event_id,
"label": label,
"room_id": event_json["room_id"],
"topological_ordering": event_json["depth"],
}
for label in event_json["content"].get(
EventContentFields.LABELS, []
)
if isinstance(label, str)
],
)
self._simple_insert_many_txn(
txn=txn,
table="event_labels",
values=[
{
"event_id": event_id,
"label": label,
"room_id": event_json["room_id"],
"topological_ordering": event_json["depth"],
}
for label in event_json["content"].get(
EventContentFields.LABELS, []
)
if isinstance(label, str)
],
)
except Exception as e:
logger.warning(
"Unable to load event %s (no labels will be imported): %s",
event_id,
e,
)
nbrows += 1
last_row_event_id = event_id