No message in zabbix server log, if Elasticsearch doesn't work properly

Pre-conditions:

1. Enabled and configured Elasticsearch
2. Free disk space less than 10%

Result:
There are no values in Monitoring->Latest data and no any warnings in zabbix server log.
See warning in elasticsearch.log:

[2018-03-28T14:13:56,107][WARN ][o.e.c.r.a.DiskThresholdMonitor] [aJ6NQn_] flood stage disk watermark [95%] exceeded on [aJ6NQn_fSEavPYKChD5INQ][aJ6NQn_][/var/lib/elasticsearch/nodes/0] free: 8.4gb[3.8%], all indices on this node will marked read-only

Expected:
Notification in zabbix server log