net/http: deflake TestCancelRequestWhenSharingConnection #56500
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The test sleeps for 1 millisecond to give the cancellation a moment
to take effect. This is flaky because the request can finish before
the cancellation of the context is seen. It's easy to verify by adding
after
go/src/net/http/transport.go
Line 2619 in 0a6c4c8
With this modification, the test fails about 5 times out of 10 runs.
The fix is easy. We just need to block the handler of the second
request until this request is cancelled. I have verify that the
updated test can uncover the issue fixed by CL 257818.
Fixes #55226.