Problem with ICMP loss

[jakub.adamek]

Hello,
I have problem with ICMP loss on servers.
Servers sometime show loss 66,6667% but when i use fping from proxy, from which is host monitored, it show 0%.
Does anyone have the same problem?
Zabbix server and proxy 6.0.5, fping 5.0.

[jakub.adamek]

In logs i found: Failed to execute command "/usr/bin/fping -c1 -t50 -i0 NAMEOFHOST": Timeout while executing a shell script.
If i do it manually, it is okay.
Any ideas?

[jakub.adamek]

I tried changing the start pingers, unfortunately it didn't change anything.
I see a delay in the queue for ICMP loss.
Can someone please help me?

[jakub.adamek]

I tried to completly reinstall zabbix-proxy, didnt help. Tried reinstal fping, install older/newer version, didnt help.
Can anyone please help?
Thx

[chda]

I had the same issue. In my case, the reason was fping itself. Just check your server with:

zabbix-server:~$ time /usr/bin/fping -c1 -t50 -i0 test.localdomain
test.localdomain : [0], 64 bytes, 0.332 ms (0.332 avg, 0% loss)

test.localdomain : xmt/rcv/%loss = 1/1/0%, min/avg/max = 0.332/0.332/0.332

real 0m5.009s
user 0m0.003s
sys 0m0.000s

zabbix-server:~$ time /usr/bin/fping -4 -c1 -t50 -i0 test.localdomain
test.localdomain : [0], 64 bytes, 0.294 ms (0.294 avg, 0% loss)

test.localdomain : xmt/rcv/%loss = 1/1/0%, min/avg/max = 0.294/0.294/0.294

real 0m0.004s
user 0m0.002s
sys 0m0.001s

My DNS server reports absence of AAAA record in a couple of milliseconds. I don't know why fping takes 5 seconds more.

We don't use ipv6 in our network, so this workaround helped:

cat <<EOF >/usr/local/bin/fping
#!/bin/bash
/usr/bin/fping -4 $*
EOF

sed -i -e 's/^FpingLocation=\/usr\/bin\/fping$/FpingLocation=\/usr\/local\/bin\/fping/' /etc/zabbix/zabbix_server.conf