Effective Go Recipes

Recipe 84

Debugging Running Services

Task

You are in charge of a messaging system. The data engineering team opens an issue for you:

For some reason, we see several empty messages in the database. We think it comes from your code and not our process. Can you please check.

You think it’s probably not from your code, since you do validate input messages before you continue. But you know the data engineering team are very professional, so you can’t discard their claim.

Looking at the code, you don’t see anything suspicious:

ship/messaging/httpd.go

// Message is a channel message.
type Message struct {
    From    string `json:"from"`
    Channel string `json:"channel"`
    Body    string `json:"body"`

    ID string `json:"-"`
}