Make DataStore 'Service Unavailable' NOT Break The Script

Is there a specific reason why it happens or way to replicate this “Service Unavailable” issue?
I still don’t understand when and why it occurs, anyone know?

[quote] Is there a specific reason why it happens or way to replicate this “Service Unavailable” issue?
I still don’t understand when and why it occurs, anyone know? [/quote]

It appears to happen randomly - for my projects, it happens every so often (Maybe 1 out of 10 times.)