Request is not canceled in retry middleware

[aleksandrlat]

Retry middleware implements retry based on timeout.
But when timeout happens prev request can still be in fly and consume resources. I.e. prev request is not stopped/canceled.
Browsers limit number of concurrent requests. And default timeout for fetch varies in different browsers and can be 2-3 minutes.

Since we are not going to wait for prev request to be finished should we cancel/stop it?

[gtkatakura]

Same problem here ;/