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net: accept <addr>: use of closed network connection #27998

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jadekler opened this issue Oct 3, 2018 · 2 comments

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commented Oct 3, 2018

What version of Go are you using (go version)?

go version go1.11 darwin/amd64

Does this issue reproduce with the latest release?

Yes.

What operating system and processor architecture are you using (go env)?

amd64/darwin

What did you do?

server, err := net.Listen("tcp", "localhost:0") followed by several conn, err := server.Accept() / conn.Close() pairs in a row.

What did you expect to see?

No errors.

What did you see instead?

Once in every ~10 tests or so, server.Accept() returns something like accept tcp 127.0.0.1:49613: use of closed network connection. I'm not sure what this error means: how can Accept state that the "network connection" is closed when its job is to establish (not use) a connection? Is the listener dead somehow? How is that possible without me having called server.Close()?

@ianlancetaylor

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commented Oct 3, 2018

Can you show us the complete program that demonstrates the problem?

@jadekler

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commented Oct 3, 2018

So sorry - in the process of making the repro, we found out that the server does indeed get closed and then hides the underlying failure. Shoot. Sorry for wasting y'alls time!

@jadekler jadekler closed this Oct 3, 2018

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