App Start measurement has large (days, months) values on iOS

[bruno-garcia]

A customer with large scale has several transactions with App Start consisting of days/weeks/months.

This happens on iOS but not on Android.

iOS App Start code: https://github.com/getsentry/sentry-cocoa/blob/472d14683103300272ffaf6377385c49a41572dc/Sources/Sentry/SentryAppStartTracker.m#L100-L131

SDK version 3.4.0

[marandaneto]

@philipphofmann after your workaround to not report huge app start for iOS, is PrivateSentrySDKOnly.appStartMeasurement gonna return null? if so, we don't need to do anything here right now.

[philipphofmann]

Yes, PrivateSentrySDKOnly.appStartMeasurement is going to return nil. If you can, please wait for 7.18.0, which should be out today or tomorrow. Again contains some fixes related to this.

[marandaneto]

https://dev.to/pyricau/android-vitals-when-did-my-app-start-24p4
Apparently Android already can give you some weird values due to different reasons and the recommendation is to filter out App start with more than a minute, we should do that as well.

Edit: getsentry/sentry-java#2127

[marandaneto]

I could not reproduce it on my end, we've filtered out app starts with more than 60s, let's wait for more feedback or repro cases, and let's watch the app start data from now on.

[philipphofmann]

Most likely related to getsentry/sentry-cocoa#1897 and getsentry/sentry-cocoa#1849