caddyserver/caddy · error

loading log filter modules: %v

Error message

loading log filter modules: %v

What it means

Error "loading log filter modules: %v" thrown in caddyserver/caddy.

Source

Thrown at modules/logging/filterencoder.go:107

			}
		}
		fe.wrappedIsDefault = true
	} else {
		// set up wrapped encoder
		val, err := ctx.LoadModule(fe, "WrappedRaw")
		if err != nil {
			return fmt.Errorf("loading fallback encoder module: %v", err)
		}
		fe.wrapped = val.(zapcore.Encoder)
	}

	// set up each field filter
	if fe.Fields == nil {
		fe.Fields = make(map[string]LogFieldFilter)
	}
	vals, err := ctx.LoadModule(fe, "FieldsRaw")
	if err != nil {
		return fmt.Errorf("loading log filter modules: %v", err)
	}
	for fieldName, modIface := range vals.(map[string]any) {
		fe.Fields[fieldName] = modIface.(LogFieldFilter)
	}

	return nil
}

// ConfigureDefaultFormat will set the default format to "console"
// if the writer is a terminal. If already configured as a filter
// encoder, it passes through the writer so a deeply nested filter
// encoder can configure its own default format.
func (fe *FilterEncoder) ConfigureDefaultFormat(wo caddy.WriterOpener) error {
	if !fe.wrappedIsDefault {
		if cfd, ok := fe.wrapped.(caddy.ConfiguresFormatterDefault); ok {
			return cfd.ConfigureDefaultFormat(wo)
		}
		return nil

View on GitHub (pinned to 50e54ee279)

Solutions

1. Check the wrapped error for the failing log filter module and fix its configuration.

When it happens

Trigger: Thrown at modules/logging/filterencoder.go:107 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of caddyserver/caddy@50e54ee279 (2026-08-15). Data as JSON: /api/errors/a2ce7f5cfcdb0713. Report an issue: GitHub.