当我使用heroku db：push（我正在使用Taps 0.3.23）时，我收到了“应用程序错误”。我已经看到一些建议，这有时会在Heroku上发生，然后问题就消失了。我在8小时的时间内尝试了很多次，结果相同。我认为以下是相关的Heroku日志信息：
2012-06-30T10:30:31+00:00 heroku[web.1]: Idling
2012-06-30T10:30:33+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2012-06-30T10:30:33+00:00 app[web.1]: [2012-06-30 10:30:33] ERROR SignalException: SIGTERM
2012-06-30T10:30:33+00:00 app[web.1]: /usr/local/lib/ruby/1.9.1/webrick/server.rb:90:in `select'
2012-06-30T10:30:43+00:00 heroku[web.1]: Stopping remaining processes with SIGKILL
2012-06-30T10:30:43+00:00 heroku[web.1]: Error R12 (Exit timeout) -> At least one process failed to exit within 10 seconds of SIGTERM
2012-06-30T10:30:45+00:00 heroku[web.1]: Process exited with status 137
2012-06-30T10:30:45+00:00 heroku[web.1]: State changed from up to down