2.7.2 | Listen queue overflow: 2 already in queue awaiting acceptance | /var/etc/openvpn/server3/sock

[slu]

Hi,

I see much of this errors in the system log:

Apr 22 14:20:54 	kernel 		sonewconn: pcb 0x[...] (local:/var/etc/openvpn/server3/sock): Listen queue overflow: 2 already in queue awaiting acceptance (2 occurrences), euid 0, rgid 0, jail 0
Apr 22 14:20:54 	kernel 		sonewconn: pcb 0x[...] (local:/var/etc/openvpn/server2/sock): Listen queue overflow: 2 already in queue awaiting acceptance (2 occurrences), euid 0, rgid 0, jail 0 

netstat -Lan

Current listen queue sizes (qlen/incqlen/maxqlen)
[..]
unix  0/0/1                            /var/etc/openvpn/server3/sock
unix  0/0/1                            /var/etc/openvpn/server2/sock
[..]
unix  0/0/128                          /var/run/php-fpm.socket
[..]

What could the cause of this log entries?
And why OpenVPN has only 1 in maxqlen?

The OpenVPN servers a bound to localhost and the clients can reach them over the port forwarding. VPN connections working so far without problems.

[slu]

A reboot fixed it, but would be interesting what can cause this issue.