A system I am working on at the moment started giving errors occasionally, say 5 times out of 10,000 messages or so. The error was pretty straightforward: json: cannot unmarshal array into Go struct field Thing.Parts of type Parts The data structure it is referring to looks like this: type Thing struct { Parts Parts } type Parts struct { Part []Part } Which represents the (slightly weird) json structure we receive in a message:...
I use opentelemetry extensively to trace my applications, and one thing I keep running into is when writing a long running process, I want to handle OS signals and still send the telemetry on shutdown. Typically, my application startup looks something like this: func main() { ctx, cancel := context.WithCancel(context.Background()) handleSignals(cancel) tracerProvider := configureTelemetry(ctx) defer tracerProvider.Shutdown(ctx) tr = traceProvider.Tracer("cli") if err := runMain(ctx, os.Args[:]); err != nil { fmt.Fprintf(os.Stderr, err.Error()) os....