𝗪𝗵𝗮𝘁 𝗪𝗲𝗯𝘀𝗶𝘁𝗲 𝗠𝗼𝗻𝗶𝘁𝗼𝗿𝗶𝗻𝗴 𝗧𝗮𝘂𝗴𝗵𝘁 𝗠𝗲 𝗔𝗯𝗼𝘂𝘁 𝗦𝗶𝗹𝗲𝗻𝘁 𝗙𝗮𝗶𝗹𝘂𝗿𝗲𝘀

I thought building NorthDuty would be simple. I expected to monitor obvious failures.

I looked for:

These problems matter. You need to know when a site is totally down. But I learned that the most frustrating failures are not loud. They are silent.

A website can return a 200 OK status code. The server responds. The homepage loads. To a basic monitor, everything looks healthy.

But to a user, the site is broken.

A 200 OK code does not mean the website works. It only means the server sent a response. Users do not experience status codes. They experience pages.

Silent failures happen when:

In these cases, the monitor sees a pass. The user sees a broken product. This is the dangerous middle area. A site can be "up" but unusable.

I started focusing on screenshots and user flows instead of just logs. Logs tell you what the system thinks happened. Screenshots show what the user actually saw.

A screenshot proves if:

I also learned that monitoring a single page is not enough. You must monitor the flow. Users do not just visit a URL. They want to complete tasks. They want to:

If one step in that path breaks, your product is broken. A single URL check will not catch this. Reliability means asking if a user can finish their task, not just if a server responds.

When silent failures happen, users often do not complain. They refresh. They try again. Then they leave. They lose faith in your product without saying a word.

Basic uptime checks are a necessary first layer. You still need to monitor DNS and response times. But you must go deeper.

You should check:

The biggest lesson I learned is this: "Up" is not the same as "working." A website can be online and still fail its users. Stop focusing only on infrastructure. Start focusing on the user experience.

Source: https://dev.to/mihail_147bfaf4bbb8ec9949/what-building-website-monitoring-taught-me-about-silent-failures-1jm