I have configured Fabric and Crashlytics in my application. I have added the call to test crashes:
Crashlytics.sharedInstance().crash()
I am seeing those crashes reported in the Dashboard with the stack traces and everything.
In the Settings menu under Notifications, I have all the alerts set to On, including Issue Velocity Alert.
According to this answer the Issue Velocity Alert:
If an issue is causing a crash in 1% of all user sessions within the past hour, you'll be notifiied.
I have received a New Fatal Issue Alert for the calls to crash() which shows the I am receiving alerts correctly.
But I haven't received any Issue Velocity Alert. Since 100% of my sessions have crashed to the same error, I should be receiving it right? The first crash happened 3 hours ago.
Note that I have tested it with 1 user on 1 device.
Why am I not receiving any alerts?
Paul from Fabric here. Crashlytics has a minimum threshold of unique users of an app before Velocity Alerts will be sent. I can't say what the exact numbers are, but they're designed to prevent apps with few users from getting spammed by our issue reporting.