Question

I am using free Heroku plan with shared database. Cedar stack, Rails 3.1.0.rc4.

When launching the application I constantly get this error, which breaks the process and which sometimes disappears after a random push:

2011-07-21T08:36:17+00:00 heroku[web.1]: Starting process with
command: bundle exec rails server -p 11382 thin
2011-07-21T08:36:23+00:00 app[web.1]: => Booting Thin
2011-07-21T08:36:23+00:00 app[web.1]: => Rails 3.1.0.rc4 application
starting in production on http://0.0.0.0:11382
2011-07-21T08:36:23+00:00 app[web.1]: => Call with -d to detach
2011-07-21T08:36:23+00:00 app[web.1]: => Ctrl-C to shutdown server
2011-07-21T08:36:23+00:00 app[web.1]: Exiting
2011-07-21T08:36:23+00:00 app[web.1]:
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/postgresql_adapter.rb:987:in
initialize': FATAL: connection limit exceeded for non-superusers
(PGError) 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/postgresql_adapter.rb:987:in
new’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/postgresql_adapter.rb:987:in
connect' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/postgresql_adapter.rb:260:in
initialize’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/postgresql_adapter.rb:27:in
new' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/postgresql_adapter.rb:27:in
postgresql_connection’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_pool.rb:292:in
new_connection' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_pool.rb:302:in
checkout_new_connection’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_pool.rb:254:in
block (2 levels) in checkout' 2011-07-21T08:36:23+00:00 app[web.1]:
from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_pool.rb:250:in
loop’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_pool.rb:250:in
block in checkout' 2011-07-21T08:36:23+00:00 app[web.1]: from
/usr/local/lib/ruby/1.9.1/monitor.rb:201:inmon_synchronize’
2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_pool.rb:249:in
checkout' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_pool.rb:151:in
con

2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_pool.rb:388:in
retrieve_connection' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_specification.rb:107:in
retrieve_connection’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/connection_adapters/abstract/connection_specification.rb:89:in
connection' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/base.rb:704:in
table_exists?’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activerecord-3.1.0.rc4/lib/active_record/base.rb:789:in
attribute_names' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.1.0.rc4/lib/action_controller/metal/params_wrapper.rb:169:in
_set_wrapper_defaults’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.1.0.rc4/lib/action_controller/metal/params_wrapper.rb:129:in
inherited' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.1.0.rc4/lib/abstract_controller/railties/routes_helpers.rb:7:in
block (2 levels) in with’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.1.0.rc4/lib/action_controller/railties/paths.rb:7:in
block (2 levels) in with' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/app/controllers/customers_controller.rb:1:in‘
2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in
require' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in
block in require’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:225:in
load_dependency' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:237:in
require’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:344:in
require_or_load' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:298:in
depend_on’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.0.rc4/lib/active_support/dependencies.rb:214:in
require_dependency' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/engine.rb:399:in
block (2 levels) in eager_load!’ 2011-07-21T08:36:23+00:00
app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/engine.rb:398:in
each' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/engine.rb:398:in
block in eager_load!’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/engine.rb:396:in
each' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/engine.rb:396:in
eager_load!’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/application.rb:83:in
eager_load!' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/application/finisher.rb:51:in
block in ‘ 2011-07-21T08:36:23+00:00 app[web.1]:
from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/initializable.rb:25:in
instance_exec' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/initializable.rb:25:in
run’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/initializable.rb:50:in
block in run_initializers' 2011-07-21T08:36:23+00:00 app[web.1]:
from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/initializable.rb:49:in
each’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/initializable.rb:49:in
run_initializers' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/application.rb:96:in
initialize!’ 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.1.0.rc4/lib/rails/railtie/configurable.rb:30:in
method_missing' 2011-07-21T08:36:23+00:00 app[web.1]: from
/app/config/environment.rb:5:in‘
2011-07-21T08:36:23+00:00 app[web.1]: from /app/config.ru:4:in `block
in ‘ 2011-07-21T08:36:23+00:00 heroku[web.1]: Process exited
2011-07-21T08:36:24+00:00 heroku[web.1]: State changed from starting
to crashed 2011-07-21T08:36:24+00:00 heroku[router]: Error H10 (App
crashed) -> GET dyno= queue= wait= service=
status=503 bytes= 2011-07-21T08:36:25+00:00 heroku[router]: Error H10

I don’t see any piece of my own code in this message.

Answer 1

That’s a Postgresql error messsage that you get when you have more connections than specified in the max_connections setting in postgresql.conf. Unless you can change that yourself, you’ll probably have to contact Heroku support.