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fix dispatcher panic on pending flush

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fixes thread panic in actix-http-3.0.0-rc.3 #2655
This commit is contained in:
Rob Ede 2022-02-22 00:19:48 +00:00
parent f940653981
commit 1ce58ecb30
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1 changed files with 10 additions and 4 deletions
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14
actix-http/src/h1/dispatcher.rs
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@ -931,10 +931,16 @@ where
"dispatcher should not be in keep-alive phase if state is not none: {:?}",
this.state,
);
debug_assert!(
this.write_buf.is_empty(),
"dispatcher should not be in keep-alive phase if write_buf is not empty",
);
// Assert removed by @robjtede on account of issue #2655. There are cases where an I/O
// flush can be pending after entering the keep-alive state causing the subsequent flush
// wake up to panic here. This appears to be a Linux-only problem. Leaving original code
// below for posterity because a simple and reliable test could not be found to trigger
// the behavior.
// debug_assert!(
// this.write_buf.is_empty(),
// "dispatcher should not be in keep-alive phase if write_buf is not empty",
// );
// keep-alive timer has timed out
if timer.as_mut().poll(cx).is_ready() {