Using the new UI to delete several hundred snapshots causes the UI to become unresponsive. After some hours, the UI becomes responsive again.
Messages like this appear in the log:
Apr 2 19:06:15 enet-rascal-1 kernel: sonewconn: pcb 0xfffff80b3e782a50: Listen queue overflow: 193 already in queue awaiting acceptance (45 occurrences)
This give two clues: the pcb number and the overflow number.
netstat -Lan | egrep "(Proto|193)"
Proto Listen Local Address
unix 193/0/128 /var/run/middlewared.sock
netstat -a | egrep "(^Address|fffff80b3e782a50)"
Address Type Recv-Q Send-Q Inode Conn Refs Nextref Addr
fffff80b3e782a50 stream 0 0 fffff80919987938 0 0 0 /var/run/middlewared.sock
So something associated with middlewared.sock is having trouble keeping up?