Redmine

Hi,

I'm running redmine since 2012 now, actually redmine 2.6.6 is used.
I want to upgrade to the 3.x.x branch.

So I decided to install 3.0.4 and I tried an upgrade. Everything on the shell works fine, console tells me that redmine sould be running but the browser tells me that there is no connection to the url+port possible.

Redmine 2.6.6 runs great btw.

When I start redmine I get this console output:

bundle exec rails server webrick -e production -p 3001
=> Booting WEBrick
=> Rails 4.2.3 application starting in production on http://localhost:3001
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
[2015-07-16 11:21:54] INFO  WEBrick 1.3.1
[2015-07-16 11:21:54] INFO  ruby 1.9.3 (2012-04-20) [x86_64-linux]
[2015-07-16 11:21:54] INFO  WEBrick::HTTPServer#start: pid=4192 port=3001

No entries in the logfile are made.

What's the best way to proceed? How can I get some more debug messages?

this is some information about my environment:

Environment:
  Redmine version                3.0.4.stable
  Ruby version                   1.9.3-p194 (2012-04-20) [x86_64-linux]
  Rails version                  4.2.3
  Environment                    production
  Database adapter               Mysql2
SCM:
  Subversion                     1.6.17
  Darcs                          2.8.1
  Mercurial                      2.2.2
  Cvs                            1.12.13
  Bazaar                         2.6.0
  Git                            1.7.10.4
  Filesystem
Redmine plugins:
  no plugin installed