"failed: first network error" when check fails to complete

[duncan9562]

Hi guys,

I have a custom item set up, which calls a script on the host being monitored.

This has been working fine, and have tested with zabbix_agentd -t.

I am now seeing log entries on the proxies:-

1642:20170731:093704.763 Zabbix agent item "net.check.private.ips" on host "host1" failed: first network error, wait for 15 seconds
1643:20170731:093719.905 resuming Zabbix agent checks on host "host1": connection restored
1645:20170731:093723.923 Zabbix agent item "net.check.private.ips" on host "host1" failed: first network error, wait for 15 seconds
1643:20170731:093739.016 resuming Zabbix agent checks on host "host1": connection restored

All other checks on that host work absolutely fine, however Zabbix is reporting that due to a network failure that one check (out of about 30) is down. Zabbix also reports that it loses connectivity to the agent, then a few seconds later the "connection restored" message is displayed.

The only thing I have noticed so far is that the script is taking a little longer than usual, but I have extended the "Timeout=" value in the agent config to 10 seconds. Unfortunately this hasn't helped.

Has anyone seen this before?

[Starko]

I have exactly the same error on Windows Hosts, where I monitor Veeam with a PowerShell Script.
The scrip is called via:

UserParameter=vbr[*],%SystemRoot%\system32\WindowsPowerShell\v1.0\powershell.exe -nologo -command "& '%PROGRAMFILES%\Zabbix\UserParameter\vbr1.0.4.ps1"' "$1" "$2"

If I test the script via

zabbix_get -s 192.168.24.17 -k vbr[VmCount,287e9538-6d48-4654-8cda-5668fd131e78]

for example, it works every single time. Takes about 8-14 seconds, but Timeout is set to 30 on Agent and Proxy.
Did you ever found a solution?

[kloczek]

If zabbix agent is using active agent setup (ServerActive instead Server) it will not be possible to use zabbix_get command because this command is for testing remotely passive items.
Testing active item is possible only locally using "zabbix_agentt -t <key>" command.

[Starko]

All I wrote is with passive checks. I don't use active checks.