Comment 13 for bug 1508807

It looks like puppet just reports error happening in provider_class.prefetch(resources) and does nothing about that.

See https://github.com/puppetlabs/puppet/blob/3.4.1/lib/puppet/transaction.rb#L272 for details

2015-10-22 03:37:34 +0000 Puppet (err): Could not prefetch neutron_subnet provider 'neutron': Can't retrieve subnet-show because Neutron or Keystone API is not available.
/etc/puppet/modules/neutron/lib/puppet/provider/neutron.rb:153:in `get_neutron_resource_attrs'
/etc/puppet/modules/neutron/lib/puppet/provider/neutron_subnet/neutron.rb:24:in `block in instances'
/etc/puppet/modules/neutron/lib/puppet/provider/neutron_subnet/neutron.rb:23:in `collect'
/etc/puppet/modules/neutron/lib/puppet/provider/neutron_subnet/neutron.rb:23:in `instances'
/etc/puppet/modules/neutron/lib/puppet/provider/neutron_subnet/neutron.rb:43:in `prefetch'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:277:in `prefetch'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:167:in `prefetch_if_necessary'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:67:in `block in evaluate'
/usr/lib/ruby/vendor_ruby/puppet/graph/relationship_graph.rb:116:in `call'
/usr/lib/ruby/vendor_ruby/puppet/graph/relationship_graph.rb:116:in `traverse'
/usr/lib/ruby/vendor_ruby/puppet/transaction.rb:108:in `evaluate'
/usr/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:164:in `block in apply'
/usr/lib/ruby/vendor_ruby/puppet/util/log.rb:149:in `with_destination'
/usr/lib/ruby/vendor_ruby/puppet/transaction/report.rb:108:in `as_logging_destination'
/usr/lib/ruby/vendor_ruby/puppet/resource/catalog.rb:163:in `apply'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:125:in `block in apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:161:in `block in benchmark'
/usr/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:160:in `benchmark'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:124:in `apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/configurer.rb:192:in `run'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:268:in `apply_catalog'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:218:in `main'
/usr/lib/ruby/vendor_ruby/puppet/application/apply.rb:146:in `run_command'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `block (2 levels) in run'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:470:in `plugin_hook'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `block in run'
/usr/lib/ruby/vendor_ruby/puppet/util.rb:478:in `exit_on_fail'
/usr/lib/ruby/vendor_ruby/puppet/application.rb:364:in `run'
/usr/lib/ruby/vendor_ruby/puppet/util/command_line.rb:137:in `run'
/usr/lib/ruby/vendor_ruby/puppet/util/command_line.rb:91:in `execute'
/usr/bin/puppet:4:in `<main>'