[Webkit-unassigned] [Bug 201483] IndexedDB: Connection to Indexed Database server lost. Refresh the page to try again

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=201483

--- Comment #2 from Sihui Liu <sihui_liu at apple.com> ---
(In reply to Jake Teton-Landis from comment #0)
> Sometimes IndexedDB reports a DOMException with name: "UnknownError" and
> message: "Connection to Indexed Database server lost. Refresh the page to
> try again".
> 
> Possible duplicate of https://bugs.webkit.org/show_bug.cgi?id=197050 - I
> wasn't sure if that bug covered this unexpected IndexedDB error as well.
> This issue prevents us from relying on WebKit's IndexedDB implementation to
> store users' data on both iOS and macOS. I was alarmed to see this from
> "Intel Mac OS X 10_14_3" user-agents, as #197050 only mentions iOS.
> 
> Here is a sampling of user agents that have reported this error:
> 
> Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/605.1.15 (KHTML,
> like Gecko) Version/12.0.3 Safari/605.1.15
> Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML,
> like Gecko) Version/12.1.2 Safari/605.1.15
> Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML,
> like Gecko) Version/13.0 Safari/605.1.15
> Mozilla/5.0 (iPhone; CPU iPhone OS 13_1 like Mac OS X) AppleWebKit/605.1.15
> (KHTML, like Gecko) Version/13.0 Mobile/15E148 Safari/604.1

Hello Jake,

You mentioned in https://bugs.webkit.org/show_bug.cgi?id=197050#c26 that on iOS 13 beta you still see the IDB error. 

Do you see com.apple.WebKit.Networking crash reports when you encounter this error?
(On iOS device you can check on Settings > Privacy > Analytics > Analytics Data.)

Do you have steps or test case to reproduce the bug?
For example, https://bugs.webkit.org/show_bug.cgi?id=197050 happened when the user backgrounded the app and brought the app to foreground again.

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