Five mistakes teams make with application logging

The gap between knowing this and actually doing it is where most teams lose ground. These are the ones we run into repeatedly when we audit application logging.

Most development decisions are really maintenance decisions wearing a different hat. It rarely shows up as a line item, which is exactly why it slips.

Common failure modes

• Treating it as a launch task rather than an ongoing one
• Assuming someone else already owns it
• Logs are what you have when something breaks at 2am
• Structure them so they can be searched, not just read
• Never checking whether the fix actually worked

Never log passwords, tokens, or full card numbers. It is worth being explicit about, because assumptions differ quietly. It is the sort of thing that looks like polish right up until it costs you an enquiry.

A reasonable first step

The short version

Code gets read far more often than it gets written, and usually by someone with less context than the author had. Three things worth confirming about application logging before you move on:

• Someone can say what the current setup is without going to look
• Never log passwords, tokens, or full card numbers — and you know whether that is true here
• There is a way to tell whether the last change to this helped

The point is not perfection, it is knowing which of these you have consciously chosen to skip.