AK
%RESPONSE_FLAGS%
Additional details about the response or connection, if any. For TCP connections, the response codes mentioned in the descriptions do not apply. Possible values are:
HTTP and TCP
UH: No healthy upstream hosts in upstream cluster in addition to 503 response code.
UF: Upstream connection failure in addition to 503 response code.
UO: Upstream overflow (circuit breaking) in addition to 503 response code.
NR: No route configured for a given request in addition to 404 response code.
HTTP only
LH: Local service failed health check request in addition to 503 response code.
UT: Upstream request timeout in addition to 504 response code.
LR: Connection local reset in addition to 503 response code.
UR: Upstream remote reset in addition to 503 response code.
UC: Upstream connection termination in addition to 503 response code.
DI: The request processing was delayed for a period specified via fault injection.
FI: The request was aborted with a response code specified via fault injection.
RL: The request was ratelimited locally by the HTTP rate limit filter in addition to 429 response code.