Remote command upon host discovery

[cerasus]

I've configured a network discovery rule for a subnet. One of the actions upon discovery is to execute a remote command on the proxy that discovered the host. What I'm seeing is that the remote command is not executed upon the discovery. The command has a macro in it: {DISCOVERY.DEVICE.IPADDRESS}. When I go to the action log, I see that the command fails and when I hover over the exclamation point, I see "Unknown host".

Attaching a screenshot of that.

Any idea why? The command is listed with the correct arguments.

[cerasus]

That error seems to come from src/zabbix_proxy/taskmanager/taskmanager.c

if (FAIL == DCget_host_by_hostid(&host, hostid))
    {
      task->data = zbx_tm_remote_command_result_create(parent_taskid, FAIL, "Unknown host.");
      goto finish;
    }

But I still don't quite understand what that means exactly. The command is supposed to be executed on the proxy and so the discovered host shouldn't matter -- even if it was "unknown" for some reason?

[cerasus]

The command is executed successfully the second time the host is processed. This must be some sort of a race condition where the host doesn't yet exist in the database and so the command fails.