> We have a Passenger/nginx application config that was working fine, but
> has started throwing an error when we configured a new app on it.  The
> setup:

> We're running passenger 3.0.12, gem installed, with nginx installed using
> passenger-install-nginx.  We're on ubuntu 10.04, with ruby 1.9.2p290.
>  Here's the error I get in the Rails log:

> ---cut---

> Passenger ApplicationSpawner: /mnt/app/current: No such file or directory
> - uname -p
> [ pid=21422 thr=8199960 file=utils.rb:176 time=2012-11-02 21:05:25.882 ]:
> *** Exception PhusionPassenger::UnknownError in
> PhusionPassenger::Rack::ApplicationSpawner (SSL_connect SYSCALL returned=5
> errno=0 state=SSLv2/v3 read server hello A
> (Faraday::Error::ConnectionFailed)) (process 21422, thread
> #<Thread:0x00000000fa3e30>):
> from /usr/lib/ruby/1.9.1/net/http.rb:799:in `connect'
> from /usr/lib/ruby/1.9.1/net/http.rb:799:in `block in connect'
> from /usr/lib/ruby/1.9.1/timeout.rb:54:in `timeout'
> from /usr/lib/ruby/1.9.1/timeout.rb:99:in `timeout'
> from /usr/lib/ruby/1.9.1/net/http.rb:799:in `connect'
> from /usr/lib/ruby/1.9.1/net/http.rb:755:in `do_start'
> from /usr/lib/ruby/1.9.1/net/http.rb:744:in `start'
> from /usr/lib/ruby/1.9.1/net/http.rb:1284:in `request'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/newrelic_rpm-3.4.2/lib/new_relic/age nt/instrumentation/net.rb:22:in
> `block in request_with_newrelic_trace'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/newrelic_rpm-3.4.2/lib/new_relic/age nt/method_tracer.rb:242:in
> `trace_execution_scoped'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/newrelic_rpm-3.4.2/lib/new_relic/age nt/instrumentation/net.rb:21:in
> `request_with_newrelic_trace'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/faraday-0.8.4/lib/faraday/adapter/ne t_http.rb:74:in
> `perform_request'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/faraday-0.8.4/lib/faraday/adapter/ne t_http.rb:37:in
> `call'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/bundler/gems/mauth-client-cd7c761346a4/li b/mauth/faraday.rb:17:in
> `call'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/bundler/gems/mauth-client-cd7c761346a4/li b/mauth/faraday.rb:10:in
> `call'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/faraday-0.8.4/lib/faraday/response.r b:8:in
> `call'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/faraday_middleware-0.8.8/lib/faraday _middleware/response_middleware.rb:30:in
> `call'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/faraday_middleware-0.8.8/lib/faraday _middleware/request/encode_json.rb:23:in
> `call'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/faraday-0.8.4/lib/faraday/connection .rb:226:in
> `run_request'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/faraday-0.8.4/lib/faraday/connection .rb:99:in
> `post'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/bundler/gems/eureka-client-842d774bbe35/l ib/eureka-client.rb:187:in
> `block in post_apis!'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/bundler/gems/eureka-client-842d774bbe35/l ib/eureka-client.rb:187:in
> `map'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/bundler/gems/eureka-client-842d774bbe35/l ib/eureka-client.rb:187:in
> `post_apis!'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/bundler/gems/eureka-client-842d774bbe35/l ib/eureka-client.rb:205:in
> `deploy_apis!'
> from config.ru:8:in `block in <main>'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/rack-1.3.6/lib/rack/builder.rb:51:in
> `instance_eval'
> from
> /mnt/app/shared/bundle/ruby/1.9.1/gems/rack-1.3.6/lib/rack/builder.rb:51:in
> `initialize'
> from config.ru:1:in `new'
> from config.ru:1:in `<main>'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/rack/applic ation_spawner.rb:225:in
> `eval'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/rack/applic ation_spawner.rb:225:in
> `load_rack_app'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/rack/applic ation_spawner.rb:157:in
> `block in initialize_server'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/utils.rb:56 3:in
> `report_app_init_status'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/rack/applic ation_spawner.rb:154:in
> `initialize_server'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/abstract_se rver.rb:204:in
> `start_synchronously'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/abstract_se rver.rb:180:in
> `start'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/rack/applic ation_spawner.rb:129:in
> `start'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/spawn_manag er.rb:253:in
> `block (2 levels) in spawn_rack_application'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/abstract_se rver_collection.rb:132:in
> `lookup_or_add'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/spawn_manag er.rb:246:in
> `block in spawn_rack_application'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/abstract_se rver_collection.rb:82:in
> `block in synchronize'
> from <internal:prelude>:10:in `synchronize'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/abstract_se rver_collection.rb:79:in
> `synchronize'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/spawn_manag er.rb:244:in
> `spawn_rack_application'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/spawn_manag er.rb:137:in
> `spawn_application'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/spawn_manag er.rb:275:in
> `handle_spawn_application'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/abstract_se rver.rb:357:in
> `server_main_loop'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/lib/phusion_passenger/abstract_se rver.rb:206:in
> `start_synchronously'
> from
> /var/lib/gems/1.9.1/gems/passenger-3.0.18/helper-scripts/passenger-spawn-se rver:99:in
> `<main>'
> Passenger ApplicationSpawner: /mnt/app/current: No such file or directory
> - uname -p
> ---cut---

> The directory in question (/mnt/app/current/) exists, and is
> read/writeable by the Passenger user (not root).  That dir is actually not
> specified anywhere in the nginx config; the root is below that, in /public.
>  I looked in passenger-spawn-server and all I can tell is that line 99
> deals with what I think is opening the socket for the spawned worker.  I'm
> not sure why it's calling 'uname -p' there in the error; I don't know
> enough about what this thing is doing.

> Does anyone have any idea where I might start looking?  I'm wondering if
> the directory it's trying to put its socket in is somehow permissioned
> wrong, but I don't know where it specifies what directory it's using for
> that.  We're using an init.d script to start nginx.  Again, this setup is
> working elsewhere - I'm not sure what's different, but we're using Chef to
> configure these nodes, so it's entirely possible that some directory or
> file is either missing or has incorrect permissions - but I'm looking for
> hints on how to figure out what the problem location is, if that's what's
> going on.  The app is (trying to run) on rails 3.1.8.

> Thanks for any help you generous folks can provide.  I'm tearing out my
> graying neckbeard hair.

> -jb