Important Update on Replication

We’ve been informed that some people have noticed their MusicBrainz slave servers have stopped applying replication packets. We’ve tracked the problem down and now have a fix for this problem.

How Do I Tell If I’m Affected?

To determine if you are affected, connect to the MusicBrainz PostgreSQL database (we recommend using ./admin/psql from your musicbrainz-server checkout) and run the following:

SELECT now() - last_replication_date FROM replication_control;

If you see a date that is larger than a few days, there’s a good chance you are affected by this bug and should upgrade.

How Do I Fix This?

Fixing this is easy, you simply need to update your Git checkout. We suggest the following:

cd musicbrainz-server
git fetch --tags origin
git checkout v-2013-10-14-replication-fix-2

EDIT: formerly used a different (broken) tag and recommended a different method of fetching tags.

When replication next runs, the data that cannot be applied will be rewritten and replication will continue as normal.