The documentation at  is somehow missleading/incomplete, increasing risk of Zabbix misconfiguration.
"Retries: The number of attempts for executing web scenario steps."
A contradiction in itself: is it retries (semantically saying, that it was tried before) or the number of total retries?
" In case of network problems (timeout, no connectivity, etc) Zabbix can repeat executing a step several times. The figure set will equally affect each step of the scenario. Up to 10 retries can be specified, default value - 1."
So the default value is -1, But the meaning of it is undefined? Does this cause indefinite retries?
Apart from that, the applicable range for the parameter should be stated. It seems, that it is -1 to 10, but I'm not sure.