In some cases, automated tests may not have been well written and do not cover all cases, or some external component, such as an API vendor, starts throwing errors in the application.
Often these errors are silent, and we only realize after a user reports the error. But questions remain as to how many users have experienced this error and not reported it. What value loss level mistake did the product have?
These questions have no answers and are almost impossible to quantify. To capture this kind of problem as quickly as possible all the time, we need to monitor the internal failures of the application.
For this type of monitoring, there are a number of tools, but the more prominent is Sentry. Sentry has very interesting ...
