Re: [Libguestfs] [libguestfs/nbdkit] nbdkit server hangs during negotiation when running in background, works in foreground (Issue #16)

On Sun, Oct 24, 2021 at 01:07:19AM -0700, Nathan Shearer wrote: > With my current setup, the issue is reproducible. If I start the > nbdkit server by placing a startup script in /etc/local.d to start > on boot, it will start, but the nbd-client will always hang during > negotiation. Killing and restarting the server and/or the client > does not resolve the deadlock. > > However, if I run the exact same script manually, by logging into > the server, then nbd-client is able to successfully connect to the > nbdkit server and everything works as expected. > > During my tests, I found that when I killed nbdkit, it would see > errors about their being insufficient "magic" or an invalid > password. I am not using any passwords, and both the nbdkit server > and nbd-client are on the same host, connecting through 127.0.0.1 I'm a bit unclear - how does it hang? What happens if you enable verbose messages (-v), what messages are sent to the log? Also try connecting with LIBNBD_DEBUG=1 nbdinfo nbd://server and see where it hangs in negotiation.