[atlas] Operational issue between ~14h-16h UTC

Dear Atlas users,

This afternoon our developers deployed an upgrade to the Atlas controlling
infrastructure. Unfortunately, the update contained a bug that we did not
catch in the test environment. This bug caused all probes to suspend their
running UDMs (User Defined Measurements) between approximately 14h-16h (UTC,
different probes were affected at different times).

After noticing the error we reverted the changes, and resumed all UDMs.
Because of this, your UDMs likely have missing data points for this time
frame. Obviously, more frequent measurements will have more missing results
while less frequent measurements will have less (or even nothing) missing
results.

"Built-in" measurements (i.e. non-UDMs) have not been affected.

Based on this experience, we'll enhance our testing procedure to lower the
chance of these kind of errors happening again.

Excuses for the inconvenience this issue may have caused.

Regards,
Robert Kisteleki
RIPE NCC