Your application may be downtime for a number of reasons. This page will help you discover why and what you can do to fix the problem.
The first step is to check the application logs. To view your logs, run:
bash
$ tsuru log -a appname
Some application issues are solved by restart. For example, your application may need to be restarted after a schema change to your database.
bash
$ tsuru restart -a appname
bash
$ tsuru app-info -a appname