Ping only - poller service


when I try to add hosts (via IP) to Ping only - discovery not work:
/opt/librenms/discovery.php 56 2018-05-09 11:35:22 - 0 devices discovered in 0.000 secs
./poller.php -h 56
LibreNMS Poller
Starting polling run:

Device ID: 56
OS: generic

Polled in 1.011 seconds

Start Alerts

End Alerts

SNMP [0/0.00s]: Get[0/0.00s] Getnext[0/0.00s] Walk[0/0.00s]
MySQL [17/0.01s]: Cell[4/0.00s] Row[0/-0.00s] Rows[7/0.01s] Column[2/0.00s] Update[2/0.00s] Insert[2/0.00s] Delete[0/0.00s]
RRD [4/0.00s]: Update[2/0.00s] Create [0/0.00s] Other[2/0.00s]

In Front - no data for device:
ICMP Response - Error Drawing Graph

ping and fping from poller and web front interface working OK.

Component Version
LibreNMS 1.39-28-g5273b29
DB Schema 249
PHP 7.0.28-0ubuntu0.16.04.1
MySQL 5.7.21-20-log
RRDTool 1.5.5


[OK] Composer Version: 1.6.5
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[WARN] Some devices have not been polled in the last 5 minutes. You may have performance issues.
[FIX] Check your poll log and see:

I use this configuration:

This is my problem: [SOLVED] RRD files no longer created on device rrd folder
But how to solve it now?

The Poller service is not recommend for use.

Is depricated or no longer support?
How to migrate from poller service into “normal” polling service. I like poller service because is multi thread and fast. Solution with crons needs a lot of CPU because all polling tasks starts in the same moment.