Trinidad requires a default context in order to run

trinidad.log

trinidad@t2:~/seguimiento/app/current$ jruby -S trinidad -f /etc/trinidad/trinidad.yml
Jul 18, 2011 6:37:13 PM org.apache.coyote.AbstractProtocolHandler init
INFO: Initializing ProtocolHandler ["ajp-bio-3031"]
Jul 18, 2011 6:37:13 PM org.apache.coyote.AbstractProtocolHandler init
INFO: Initializing ProtocolHandler ["http-bio-3000"]
Jul 18, 2011 6:37:13 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Tomcat
Jul 18, 2011 6:37:13 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.11
2011-07-18 18:37:13 INFO: No global web.xml found
2011-07-18 18:37:14 INFO: Info: received max runtimes = 4
2011-07-18 18:37:14 INFO: jruby 1.6.2 (ruby-1.8.7-p330) (2011-05-23 e2ea975) (OpenJDK Client VM 1.6.0_20) [linux-i386-java]
2011-07-18 18:37:14 INFO: Info: using runtime pool timeout of 30 seconds
2011-07-18 18:37:14 INFO: Info: received min runtimes = 1
2011-07-18 18:37:14 INFO: Info: received max runtimes = 4
2011-07-18 18:37:24 INFO: Info: add application to the pool. size now = 1
2011-07-18 18:37:24 INFO: The start() method was called on component [Realm[Simple]] after start() had already been called. The second call will be ignored.
2011-07-18 18:37:24 INFO: No global web.xml found
2011-07-18 18:37:24 INFO: Info: received max runtimes = 4
2011-07-18 18:37:24 INFO: jruby 1.6.2 (ruby-1.8.7-p330) (2011-05-23 e2ea975) (OpenJDK Client VM 1.6.0_20) [linux-i386-java]
2011-07-18 18:37:24 INFO: Info: using runtime pool timeout of 30 seconds
2011-07-18 18:37:24 INFO: Info: received min runtimes = 1
2011-07-18 18:37:24 INFO: Info: received max runtimes = 4
2011-07-18 18:37:31 SEVERE: Error while registering Oracle JDBC Diagnosability MBean.
2011-07-18 18:37:35 INFO: Info: add application to the pool. size now = 1
2011-07-18 18:37:35 INFO: Starting ProtocolHandler ["ajp-bio-3031"]
2011-07-18 18:37:35 INFO: Starting ProtocolHandler ["http-bio-3000"]

trinidad.yml

---
  port: 3000
  ajp:      
    port: 3031
  environment: production                           
  jruby_min_runtimes: 1
  jruby_max_runtimes: 4 
  log: INFO
  web_apps:
    seguimiento:
      web_app_dir: /home/trinidad/seguimiento/app/current
      context: /backend
    seguimiento-frontend:
      web_app_dir: /home/trinidad/seguimiento-frontend/app/current
      context: /