1879388 - Android: Changing networks midway through pageload leads to incomplete load

Status: RESOLVED DUPLICATE of bug 1879387

(Core :: Networking, defect)

Description

[Andrew Creskey [:acreskey]]

When we transition networks midway through page load we are sometimes left with a partially loaded page.

For example:

• Share network via wifi from a host desktop machine.
• Connect to this wifi from Geckoview_exmple
• Start loading a large website (e.g. www.washingtonpost.com)
• Midway through the pageload (after first paint), disable the wifi sharing
• The Android device will transition to the next available wifi network

Result:
The page will be left in an incomplete state. [see attachment]
Only reloading it will fix it.

Expectation:
In progress connections are automatically retried, allowing for a complete pageload?
Chrome does seem to often handling this gracefully, but certainly not always.

Opening this bug for discussion -- it's not clear if we could do this better.

To make the partially loaded page behaviour easier to reproduce, I add packet-level network throttling on the wifi host desktop (e.g. 2mbps and 50ms latency).

I did ensure that network.http.http2.move_to_pending_list_after_network_change from bug 1706377 was enabled.
From remote DevTools, the content did look to be almost all HTTP/2 requests.

Comment 1

[Andrew Creskey [:acreskey]]

Attachment: geckoview_pageload.jpg

Comment 2

[Andrew Creskey [:acreskey]]

Profile:
https://share.firefox.dev/42AWuAU

Not sure how long it takes for requests to timeout?

Comment 3

[Andrew Creskey [:acreskey]]

Somehow this was duplicated, see bug 1879387