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Replace UPDATE with UPSERT on device_max_stream_id table (#6363)

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Andrew Morgan 2019-11-15 14:02:34 +00:00 committed by GitHub
parent 53b6559a89
commit 657d614f6a
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2 changed files with 16 additions and 2 deletions
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1
changelog.d/6363.bugfix Normal file
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@ -0,0 +1 @@
Fix `to_device` stream ID getting reset every time Synapse restarts, which had the potential to cause unable to decrypt errors.

17
synapse/storage/data_stores/main/deviceinbox.py
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@ -358,8 +358,21 @@ class DeviceInboxStore(DeviceInboxWorkerStore, DeviceInboxBackgroundUpdateStore)
def _add_messages_to_local_device_inbox_txn(
self, txn, stream_id, messages_by_user_then_device
):
sql = "UPDATE device_max_stream_id" " SET stream_id = ?" " WHERE stream_id < ?"
txn.execute(sql, (stream_id, stream_id))
# Compatible method of performing an upsert
sql = "SELECT stream_id FROM device_max_stream_id"
txn.execute(sql)
rows = txn.fetchone()
if rows:
db_stream_id = rows[0]
if db_stream_id < stream_id:
# Insert the new stream_id
sql = "UPDATE device_max_stream_id SET stream_id = ?"
else:
# No rows, perform an insert
sql = "INSERT INTO device_max_stream_id (stream_id) VALUES (?)"
txn.execute(sql, (stream_id,))
local_by_user_then_device = {}
for user_id, messages_by_device in messages_by_user_then_device.items():