On Sun, May 15, 2022 at 11:45 AM Nikolaus Rath <nikolaus@xxxxxxxx> wrote: > > Hi, > > I am observing some strange errors when using the Kernel's NBD driver with NBDkit. > > On the kernel side, I see: > > May 15 16:16:11 vostro.rath.org kernel: nbd0: detected capacity change from 0 to 104857600 > May 15 16:16:11 vostro.rath.org kernel: nbd1: detected capacity change from 0 to 104857600 > May 15 16:18:23 vostro.rath.org kernel: block nbd0: Possible stuck request 00000000ae5feee7: control (write@4836316160,32768B). Runtime 30 seconds > May 15 16:18:25 vostro.rath.org kernel: block nbd0: Possible stuck request 000000007094eddc: control (write@5372947456,10240B). Runtime 30 seconds The server isn't responding to the request fast enough, and you don't have a timeout set so it'll just hang until you disconnect. > May 15 16:18:27 vostro.rath.org kernel: block nbd0: Suspicious reply 89 (status 0 flags 0) The server double replied to a request. Thanks, Josef