troubleshooting Interrupted system call (code=4)

shadowbox

Using openvpn 2.2.1 on Xubuntu 12.04. I am able to connect most of the time without problems, but intermittantly (3x per hour on avg) I get "event_wait : Interrupted system call (code=4)" and the service does a hard restart. Most of the time it reconnects without further issue. Sometimes it restarts over and over, preventing a connection. When it does this a hard reboot of the OS usually works to get it right again. I'd like to find out what the root cause of this behavior is, but "verb 5" doesn't show any additional information about the error.

I've done quite a bit of searching for answers already and I see this error come up quite often in search results, but it is never answered what is the cause. What I have been able to determine from testing is that the openvpn service is getting SIGHUP or SIGINT from the OS. For what reason I am uncertain. Please note I am sure this is not a SIGUSR1 or SIGUSR2. Using kill to send SIGUSR1 or SIGUSR2 produces different behavior, either output status SIGUSR2 or for SIGUSR1 logs show detailed info on the call ie "SIGUSR1[soft,tls-error] received, process restarting".

What would be causing a SIGHUP or SIGINT to get sent to openvpn?

Relevant lines from config file below:

client
dev tun
proto udp
remote myserver.net 1194
resolv-retry infinite
nobind
persist-key
persist-tun
comp-lzo
verb 3
remote-cert-tls server
ping-restart 60
script-security 2
up /etc/openvpn/update-resolv-conf
down /etc/openvpn/update-resolv-conf
ping 10
ca /etc/openvpn/myca.crt
cert /etc/openvpn/mycert.crt
key /etc/openvpn/mykey.key
crl-verify crl.pem
log-append /var/log/openvpn.log
user nobody
group nogroup
chroot /var/run/openvpn/jail
mssfix 1400

shadowbox

bump... Google is full of people asking about this and so far no answers. Anybody?

Traffic

shadowbox wroteand so far no answers

Please see the Forum rules (top of page)

shadowbox

@Traffic It would be more helpful if you told me which forum rule you think it is I'm not following. I've posted my client config, I can't post the server config because its not my server. I've told you my goal. I'm not having problems connecting, but staying connected, so #3 doesn't seem to apply. If you think the logfile would be helpful I can post it but I've not found any useful information other than what I've already shared.

Traffic

shadowbox wrote@Traffic It would be more helpful if you told me which forum rule you think it is I'm not following. I've posted my client config

The rules are: Server & Client .. Config & Logs .. Seems fairly simple.

shadowbox wroteI can't post the server config because its not my server.

There is nothing we can do without your server details .. most of the work OpenVPN does takes place on the server. I suggest you contact the server admin for help.

shadowbox wroteWhat would be causing a SIGHUP or SIGINT to get sent to openvpn?

Most likely cause is a network error where the client=Server connection is lost .. check your network equipment for defects and contact your service provider for support.