Symptoms
Alert re_adapter_bill are frequently fired by Prometheus to Zabbix.
On Zabbix web frontend problems section, the triggered problems has a fixed trend to it.
Example:
Cause
According to CloudBlue 21.x official documentation, this alert will appear due time taken to for order calculation is more than 5 seconds. The 5 seconds threshold in the Prometheus alert rule is too low.
Resolution
Increase the Prometheus alert rule re_adapter_bill treshold to a higher and acceptable value for the environment by following this KCS article: How to increase threshold for re_adapter_bill and re_adapter_rate alerts in Prometheus.