On Thu, Jan 20, 2022 at 12:06 AM Carla Iriberri <ciriberri@xxxxxxxxxxxxxx> wrote: > On Wed, Jan 19, 2022 at 5:42 AM Michael Paquier <michael@xxxxxxxxxxx> wrote: >> "On an unexpected EOF, versions before OpenSSL 3.0 returned >> SSL_ERROR_SYSCALL, nothing was added to the error stack, and errno was >> 0. Since OpenSSL 3.0 the returned error is SSL_ERROR_SSL with a >> meaningful error on the error stack." > Thanks, Michael, that's it, indeed! I had missed that part of the > OpenSSL docs. These PG instances are running on Ubuntu Focal hosts that come > with OpenSSL 1.1.1. Good news, I'm glad they nailed that down. I recall that this behaviour was a bit of a moving target in earlier versions: https://www.postgresql.org/message-id/CAEepm%3D3cc5wYv%3DX4Nzy7VOUkdHBiJs9bpLzqtqJWxdDUp5DiPQ%40mail.gmail.com