RestClient hangs when Destination closes Connection during Request Body Upload #34707
Description
The client continues to block despite the receiving server having closed the connection already.
Reproduced on Spring Boot version 3.4.4
Works with 3.3.10, likely because that doesn't use io.projectreactor.netty:reactor-netty-http.
Sample application reproducing the bug: https://github.com/mspiess/http-client-bug-reproduction
Find the necessary steps in that repository's README.md.
Excuse the convoluted setup, but I have been unable to reproduce it outside of docker.
The deprecated exchangeTimeout on ReactorClientHttpRequestFactory can be used to force a timeout, but the connection is still leaked.
The other timeout options seem to have no effect.