(Previous email was sent incomplete, sorry about that).

TL;DR: We have just deleted some data on loop-server as we're in beta. this
impacts a really low number of users.

Hi folks,

Some time ago, we found a bug on the server side
<https://bugzilla.mozilla.org/show_bug.cgi?id=1111579>, which caused some
Firefox Accounts hello sessions to lose some associated data .

This affects all connected FxA users that haven't reconnected to their
profile since more than one month (on the 2014-12-19, date when we pushed
to hotfix to the server).

The number of impacted users is approx 6.5k users, which is a tiny fraction
of the total users we have. All these users were in an inconsistent state,
storing information at a wrong location on the database.

Today, we cleaned the database by removing information associated to these
users. As a result, impacted users will be asked to log-in again, and some
stored information about them will be lost.

*More details about the issue:*

When a user is connected with its FxA information, we're using (a
derivation of) their id as the primary key to store the associated data
(call-urls, rooms, SP urls).

Once we lose this connection to FxA, we are storing and retrieving the
information with a different key (a derivation of the hawk id).

It means all the users who have connected to Firefox Accounts will be in a
broken state after one month if inactivity.

— Alexis
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