This incident type involves an anomalous number of frontend 4xx HTTP responses for a particular host. This may indicate a problem with the HAProxy, which is a load balancer often used in web architectures. It can result in service disruptions and should be investigated promptly.
Parameters
Debug
Check the HAProxy configuration file for any errors or typos
Check the log files for any errors or issues
Check the status of the HAProxy service
Check the network connectivity for the affected host
Check the HTTP response code for the affected host
Network or connectivity issues between the HAProxy and backend servers
Repair
Restart the HAProxy service.
Learn more
Related Runbooks
Check out these related runbooks to help you debug and resolve similar issues.