About things you built long ago that start doing weird things

Andreas tells the story of a old system which suddenly exhibited a new and frightening bug. Lars shares similar experiences of things going wrong in new and novel ways.When things do go wrong, it is so nice to have supervision trees or other things which allow you to hear about problems, not to mention recover from them.Also covered are some stories about TCP, networks, and timeouts. And a realization that testing the frameworks upon which you build could have saved some bacon, had it just been done a long time ago.LinksDjangoModel-view-controllerDrupalUnicode collationSupervision treesOxide and friends - episode 27TCP_NODELAYQUIC and HTTP/3UDPNyqvist-Shannon sampling theoremHexagonal designQuotesGaming convention management systemWhen I say view, I mean controllerView is a better wordIf I ignore it, it will go awayDestructive favouritesAlternative class hierarchiesFailed in new and novel waysBoth a mistake, and interestingAaah, circumflex!TCP the good parts