[Samba] dc stops working

[mourik jan c heupink]

Hi,

Today is the third time in a week that our sernet-samba 4.2.4 dc2 
stopped working. Just restarting samba didn't solve it: we had to reboot 
that DC, to make things work again.

I started samba on that dc, loglevel 5, while observing the logs, and it 
seems to start normally, no errors, but once started, there appear many 
lines like:

> [2015/10/20 12:46:34.313113,  3] ../source4/smbd/service_stream.c:66(stream_terminate_connection)
>   Terminating connection - 'dcesrv: NT_STATUS_CONNECTION_DISCONNECTED'
> [2015/10/20 12:46:34.313182,  5] ../source4/lib/messaging/messaging.c:550(imessaging_cleanup)
>   imessaging: cleaning up /var/lib/samba/private/smbd.tmp/msg/msg.6002.44
> [2015/10/20 12:46:34.313354,  3] ../source4/smbd/process_single.c:114(single_terminate)
>   single_terminate: reason[dcesrv: NT_STATUS_CONNECTION_DISCONNECTED]
> [2015/10/20 12:46:34.354715,  3] ../source4/smbd/service_stream.c:66(stream_terminate_connection)
>   Terminating connection - 'dcesrv: NT_STATUS_CONNECTION_DISCONNECTED'
> [2015/10/20 12:46:34.354772,  5] ../source4/lib/messaging/messaging.c:550(imessaging_cleanup)
>   imessaging: cleaning up /var/lib/samba/private/smbd.tmp/msg/msg.6002.44
> [2015/10/20 12:46:34.354875,  3] ../source4/smbd/process_single.c:114(single_terminate)
>   single_terminate: reason[dcesrv: NT_STATUS_CONNECTION_DISCONNECTED]
> [2015/10/20 12:46:34.381823,  3] ../source4/smbd/service_stream.c:66(stream_terminate_connection)
>   Terminating connection - 'dcesrv: NT_STATUS_CONNECTION_DISCONNECTED'
> [2015/10/20 12:46:34.381848,  5] ../source4/lib/messaging/messaging.c:550(imessaging_cleanup)
>   imessaging: cleaning up /var/lib/samba/private/smbd.tmp/msg/msg.6002.44

On other dc's I see these lines only seldom. Could these lines have a 
relation with samba stopping to work? What could these lines mean? Or 
are they harmless, and should I look elsewhere?

MJ