Before 16, an exception during render left React in an inconsistent state and the usual advice was to let it crash. 16 unmounts the whole tree by default,…
Grok is regular expressions with named patterns, and it earns its reputation honestly: a pattern that backtracks on an unexpected line will use an entire CPU and stall…
Calling a method on null used to end the request with a fatal that no handler could intercept, which is why every framework had a register_shutdown_function checking error_get_last().…
The email that arrived four times and the charge that arrived twice. What makes a job safe to run again, and keeping workers alive without them serving stale…
Under Upstart, finding out why a service failed to start meant knowing which log file it wrote to. systemctl status prints the exit code and the last ten…
The instinct is to set up log aggregation when there is a problem to investigate. By then the interesting logs have rotated away, and the incident is reconstructed…
A containerised application writing to /var/log/app.log has written to a filesystem that disappears with the container, and nothing outside can see it. The convention is that a container…