synapse/changelog.d/10343.bugfix at 751372fa61e28f06715d086fe5cc58d174ca1a17 - tileradotorg/synapse - tilera Git

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Andreas Rammhold e3e73e181b

Upsert redactions in case they already exists (#10343 )

* Upsert redactions in case they already exists

Occasionally, in combination with retention, redactions aren't deleted
from the database whenever they are due for deletion. The server will
eventually try to backfill the deleted events and trip over the already
existing redaction events.

Switching to an UPSERT for those events allows us to recover from there
situations. The retention code still needs fixing but that is outside of
my current comfort zone on this code base.

This is related to #8707 where the error was discussed already.

Signed-off-by: Andreas Rammhold <andreas@rammhold.de>

* Also purge redactions when purging events

Previously redacints where left behind leading to backfilling issues
when the server stumbled across the already existing yet to be
backfilled redactions.

This issues has been discussed in #8707.

Signed-off-by: Andreas Rammhold <andreas@rammhold.de>

2021-07-09 11:03:02 +01:00

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Fix errors during backfill caused by previously purged redaction events. Contributed by Andreas Rammhold (@andir).