rake aborted! getaddrinfo: Name or service not known

I'm deploying new rails applications. Everything works well
except when it comes to the db migration:

* executing "cd /var/rails/benefits_test/releases/20101129190121 &&
/opt/ruby-enterprise-1.8.7-2010.02/bin/rake RAILS_ENV=production
db:util:migrate"
servers: ["ps-test-app1"]
[ps-test-app1] executing command
** [out :: ps-test-app1] (in
/filestore/rails/benefits_test/releases/20101129190121)
*** [err :: ps-test-app1] rake aborted!
*** [err :: ps-test-app1] getaddrinfo: Name or service not known
*** [err :: ps-test-app1]
*** [err :: ps-test-app1] (See full trace by running task with --trace)
command finished
failed: "sh -c 'cd /var/rails/benefits_test/releases/20101129190121 &&
/opt/ruby-enterprise-1.8.7-2010.02/bin/rake RAILS_ENV=production
db:util:migrate'" on ps-test-app1

When I manually run it with '--trace' I see nothing evident:
[root@ps-test-app1 current]# rake RAILS_ENV=production db:migrate
--trace
(in /filestore/rails/benefits_test/releases/20101129190121)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
getaddrinfo: Name or service not known
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:861:in
`initialize'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:861:in `open'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:861:in
`open_server'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:759:in
`open_server'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:757:in `each'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:757:in
`open_server'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:1342:in
`initialize'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:1630:in `new'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/drb/drb.rb:1630:in
`start_service'
/filestore/rails/benefits_test/releases/20101129190121/vendor/plugins/backgroundrb/lib/backgroundrb.rb:11
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:158:in
`require'
/filestore/rails/benefits_test/releases/20101129190121/vendor/plugins/backgroundrb/init.rb:1:in
`evaluate_init_rb'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:158:in
`evaluate_init_rb'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/reporting.rb:11:in
`silence_warnings'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:154:in
`evaluate_init_rb'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:48:in
`load'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:38:in
`load_plugins'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:37:in
`each'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:37:in
`load_plugins'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:369:in
`load_plugins'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:165:in
`process'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in
`send'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in
`run'
/filestore/rails/benefits_test/releases/20101129190121/config/environment.rb:23
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in
`require'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in
`new_constants_in'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in
`require'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/misc.rake:4
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in
`call'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in
`execute'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in
`each'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in
`execute'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in
`invoke_with_call_chain'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/monitor.rb:242:in
`synchronize'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in
`invoke_with_call_chain'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in
`invoke_prerequisites'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in
`each'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in
`invoke_prerequisites'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in
`invoke_with_call_chain'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/1.8/monitor.rb:242:in
`synchronize'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in
`invoke_with_call_chain'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in
`invoke'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in
`invoke_task'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in
`top_level'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in
`each'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in
`top_level'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in
`standard_exception_handling'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in
`top_level'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in
`run'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in
`standard_exception_handling'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in
`run'
/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
/opt/ruby-enterprise-1.8.7-2010.02/bin/rake:19:in `load'
/opt/ruby-enterprise-1.8.7-2010.02/bin/rake:19

I can ping the db with no problems and I can also telnet to the db
successfully from the app server:

[root@ps-test-app1 20101129190121]# telnet ps-test-db 3306
Trying 10.204.47.161...
Connected to ps-test-db.localdomain (10.204.47.161).
Escape character is '^]'.
4
5.1.33jSD7(_*2J\rJWW.~R\[
                ot packets out of orderConnection closed by foreign
host.

I’m using the following “database.yml”:

production:
  adapter: mysql
  database: tsise_development
  username: *user*
  password: *pass*
  host: ps-test-db
  reconnect: true

Can someone help me out?

Thanks,
Franck