i've read that
loadbalance: false will try another host if the selected one becomes unresponsive.
If set to true and multiple Logstash hosts are configured, the output plugin
load balances published events onto all Logstash hosts. If set to false, the
output plugin sends all events to only one host (determined at random) and will
switch to another host if the selected one becomes unresponsive.
The default value is false.
loadbalance: true also enable failover?
or will it wait forever? or even worse, drop the data?