[DRBD-user] drbd r0: sock_create_kern failed, err = -97

[Holger Kiehl]

Hello,

I am trying to setup a system with DRBD over Infiniband (sdp) and see the
following message when doing 'drbdadm connect r0':

   kernel: drbd r0: conn( StandAlone -> Unconnected ) 
   kernel: drbd r0: Starting receiver thread (from drbd_w_r0 [38537])
   kernel: drbd r0: receiver (re)started
   kernel: drbd r0: conn( Unconnected -> WFConnection ) 
   kernel: drbd r0: sock_create_kern failed, err = -97
   kernel: drbd r0: conn( WFConnection -> Disconnecting ) 
   kernel: drbd r0: Connection closed
   kernel: drbd r0: conn( Disconnecting -> StandAlone ) 
   kernel: drbd r0: State change failed: Need a connection to start verify or resync
   kernel: drbd r0:  mask = 0x1f0 val = 0x80
   kernel: drbd r0:  old_conn:StandAlone wanted_conn:WFConnection
   kernel: drbd r0: receiver terminated
   kernel: drbd r0: Terminating drbd_r_r0

What is this 'sock_create_kern failed, err = -97' error?

System is Fedora 31 with drbd-utils-9.12.0-3.fc31.x86_64 and a
self build kernel.org kernel 5.5.6.

Could it be that the self build kernel has something missing?

Any hint is much appreciated.

Regards,
Holger