How about Bugzilla?

[Peter Robinson]

>> It works this very moment and it worked the moment I wrote the first
>> response. Try another
>> SSL-based page and see if that works and check your connection too.
>
> It has severe database connection problems since yesterday (as confirmed
> by the server-side error messages). Obviously, users who encounter such
> problems don't sit and wait and retry forever.

I get those error messages on quite a regular basis. I seem to
remember they're server 500 error messages with a note about the DB is
unavailable, or too many connections or something. It eventually comes
back but it is quite painful.

Peter