> What's the point of posting a link to the front page of your blog, where the most recent article is 15 days old (4 hours after the comment above)?

I think OP is saying 'I am going to investigate the situation; when I am finished here [the blog] is where I will post my response', not that there is something there already.

That said, it's all a little too PR-Bot for my taste (although there's probably only so many ways to say the same info without accidentally accepting liability or something).

Me, I'm the swarthy pirate. Arrrh.

Well, he promised a detailed blog post, at which point that link will be extremely helpful.

I do not think it is fair to expect an immediate detailed response to those questions. If I were CEO of Heroku, I wouldn't say anything definite until after talking to the engineers and product managers involved--even if I was already pretty sure what happened. The worst thing you could do at this point is say something that's just wrong.

But a link, that doesn't point anywhere useful, introduced by a PR phrase that sounds a little like "Your call is important to us", was a little annoying, esp. after reading the OP where they say they have contacted Heroku multiple times on this issue.

Most probable cause: smart routing is hard to scale. Multiple routers, with each one doing random distribution independently of others will still produce a globally random distribution. No need for inter-router synchronization.

If multiple routers try smart routing, they must do quite a bit of state sharing to avoid situations where N routers try to schedule their tasks on a single dyno. And even if you split dynos between routers then you need to move requests between routers in order to balance them.