$ RAILS_ENV=production rake db:migrate --trace
(in /opt/redmine-0.8.7)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
rake aborted!
uninitialized constant ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::PGconn
/opt/redmine-0.8.7/vendor/rails/activesupport/lib/active_support/dependencies.rb:493:in `const_missing'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:860:in `connect'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:259:in `initialize'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:37:in `new'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:37:in `postgresql_connection'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/connection_specification.rb:292:in `send'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/connection_specification.rb:292:in `connection='
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/connection_specification.rb:260:in `retrieve_connection'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/connection_specification.rb:78:in `connection'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/migration.rb:408:in `initialize'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/migration.rb:373:in `new'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/migration.rb:373:in `up'
/opt/redmine-0.8.7/vendor/rails/activerecord/lib/active_record/migration.rb:356:in `migrate'
/opt/redmine-0.8.7/vendor/rails/railties/lib/tasks/databases.rake:99
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:635:in `call'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:635:in `execute'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:630:in `each'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:630:in `execute'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:589:in `invoke_with_call_chain'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:582:in `invoke'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2050:in `invoke_task'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2028:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2028:in `each'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2028:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2067:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2022:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2000:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2067:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1997:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
/usr/bin/rake:19:in `load'
/usr/bin/rake:19