Istio Error Flag
Posted on Wed 21 August 2024 in Tech
HTTP and TCP
| Long name | Short name | Description |
|---|---|---|
| NoHealthyUpstream | UH | No healthy upstream hosts in upstream cluster in addition to 503 response code. |
| UpstreamConnectionFailure | UF | Upstream connection failure in addition to 503 response code. |
| UpstreamOverflow | UO | Upstream overflow (circuit breaking) in addition to 503 response code. |
| NoRouteFound | NR | No route configured for a given request in addition to 404 response code or no matching filter chain for a downstream connection. |
| UpstreamRetryLimitExceeded | URX | The request was rejected because the upstream retry limit (HTTP) or maximum connect attempts (TCP) was reached. |
| NoClusterFound | NC | Upstream cluster not found. |
| DurationTimeout | DT | When a request or connection exceeded max_connection_duration or max_downstream_connection_duration. |
HTTP only
| Long name | Short name | Description |
|---|---|---|
| DownstreamConnectionTermination | DC | Downstream connection termination. |
| FailedLocalHealthCheck | LH | Local service failed health check request in addition to 503 response code. |
| UpstreamRequestTimeout | UT | Upstream request timeout in addition to 504 response code. |
| LocalReset | LR | Connection local reset in addition to 503 response code. |
| UpstreamRemoteReset | UR | Upstream remote reset in addition to 503 response code. |
| UpstreamConnectionTermination | UC | Upstream connection termination in addition to 503 response code. |
| DelayInjected | DI | The request processing was delayed for a period specified via fault injection. |
| FaultInjected | FI | The request was aborted with a response code specified via fault injection. |
| RateLimited | RL | The request was ratelimited locally by the HTTP rate limit filter in addition to 429 response code. |
| UnauthorizedExternalService | UAEX | The request was denied by the external authorization service. |
| RateLimitServiceError | RLSE | The request was rejected because there was an error in rate limit service. |
| InvalidEnvoyRequestHeaders | IH | The request was rejected because it set an invalid value for a strictly-checked header in addition to 400 response code. |
| StreamIdleTimeout | SI | Stream idle timeout in addition to 408 or 504 response code. |
| DownstreamProtocolError | DPE | The downstream request had an HTTP protocol error. |
| UpstreamProtocolError | UPE | The upstream response had an HTTP protocol error. |
| UpstreamMaxStreamDurationReached | UMSDR | The upstream request reached max stream duration. |
| OverloadManagerTerminated | OM | Overload Manager terminated the request. |
| DnsResolutionFailed | DF | The request was terminated due to DNS resolution failure. |
| DropOverload | DO | The request was terminated in addition to 503 response code due to drop_overloads. |