记录器因Sinatra 1.4.2，Ruby 2.0.0-p195，Passenger 4.0.3和Rack 1.5.2失败吗？

Question

This is my config.ru:

require 'sinatra'
require 'rack/contrib'

root_dir = File.dirname(__FILE__)
require File.join(root_dir,'app.rb')

set :environment, :development

log = File.new("log/sinatra.log","a+")
$stdout.reopen(log)
$stderr.reopen(log)
$stderr.sync=true
$stdout.sync=true

run Ivende.new

The app.rb:

require 'sinatra'
require 'sinatra/reloader'
require 'time'
require 'json'

class Ivende < Sinatra::Application
enable :sessions
set :environment, :development

configure :production do
set :clean_trace,true
end

configure :development do
set :logging, true
end

helpers do
include Rack::Utils

end
require_relative 'models/init'
require_relative 'helpers/init'
require_relative 'routes/init'
end

Inside routes I have this file:

class Ivende < Sinatra::Application

get "/" do
"HOME PAGE "
logger.info("foooooolanito")
end
end

The strange behavior I'm seeing is, when I invoke the main route "/" with the logger line, the explorer shows me the typical passenger error page with the message:

An error occurred while starting up the preloader: it did not write a startup response in time.

In the sinatra.log file I get:

Ready !> socket:
unix:/tmp/passenger.1.0.10641/generation-0/backends/preloader.10677 !>
!> Ready !> socket:
unix:/tmp/passenger.1.0.10641/generation-0/backends/preloader.10721 !>
!> Ready !> socket:
unix:/tmp/passenger.1.0.10641/generation-0/backends/preloader.10774 !>
!> Ready !> socket:
unix:/tmp/passenger.1.0.10641/generation-0/backends/preloader.10806 !>

Inside the Apache log I get:

in 'void
Passenger::ApplicationPool2::SmartSpawner::throwPreloaderSpawnException(const
string&, Passenger::SpawnException::ErrorKind,
Passenger::ApplicationPool2::Spawner::BackgroundIOCapturerPtr&, const
DebugDirPtr&)' (SmartSpawner.h:150) in 'std::string
Passenger::ApplicationPool2::SmartSpawner::negotiatePreloaderStartup(Passenger::ApplicationPool2::SmartSpawner::StartupDetails&)'
(SmartSpawner.h:558) in 'void
Passenger::ApplicationPool2::SmartSpawner::startPreloader()'
(SmartSpawner.h:206) in 'virtual
Passenger::ApplicationPool2::ProcessPtr
Passenger::ApplicationPool2::SmartSpawner::spawn(const
Passenger::ApplicationPool2::Options&)' (SmartSpawner.h:744) in 'void
Passenger::ApplicationPool2::Group::spawnThreadRealMain(const
SpawnerPtr&, const Passenger::ApplicationPool2::Options&, unsigned
int)' (Implementation.cpp:695)

[ 2013-05-26 01:36:23.7933 10646/7f6ed6a34700
agents/HelperAgent/RequestHandler.h:1884 ]: [Client 20] Cannot
checkout session. An error occurred while starting up the preloader:
it did not write a startup response in time. [ 2013-05-26
01:36:24.2287 10646/7f6ed8b49700 Pool2/Spawner.h:739 ]: [App 10874
stdout]  [ 2013-05-26 01:37:54.1869 10646/7f6ed8b49700
Pool2/Implementation.cpp:762 ]: Could not spawn process for group
/home/dd/dev/ivende/wsapi#default: An error occurred while starting up
the preloader: it did not write a startup response in time. in 'void
Passenger::ApplicationPool2::SmartSpawner::throwPreloaderSpawnException(const
string&, Passenger::SpawnException::ErrorKind,
Passenger::ApplicationPool2::Spawner::BackgroundIOCapturerPtr&, const
DebugDirPtr&)' (SmartSpawner.h:150) in 'std::string
Passenger::ApplicationPool2::SmartSpawner::negotiatePreloaderStartup(Passenger::ApplicationPool2::SmartSpawner::StartupDetails&)'
(SmartSpawner.h:558) in 'void
Passenger::ApplicationPool2::SmartSpawner::startPreloader()'
(SmartSpawner.h:206) in 'virtual
Passenger::ApplicationPool2::ProcessPtr
Passenger::ApplicationPool2::SmartSpawner::spawn(const
Passenger::ApplicationPool2::Options&)' (SmartSpawner.h:744) in 'void
Passenger::ApplicationPool2::Group::spawnThreadRealMain(const
SpawnerPtr&, const Passenger::ApplicationPool2::Options&, unsigned
int)' (Implementation.cpp:695)

[ 2013-05-26 01:37:54.1871 10646/7f6ed6a34700
agents/HelperAgent/RequestHandler.h:1884 ]: [Client 20] Cannot
checkout session. An error occurred while starting up the preloader:
it did not write a startup response in time.

If I remove these lines from my config.ru:

log = File.new("log/sinatra.log","a+") 
$stdout.reopen(log) 
$stderr.reopen(log) 
$stderr.sync=true 
$stdout.sync=true

And:

logger.info("foooooolanito")

Then I see the HOME PAGE text I expect.

This project was migrated from a machine that had Ruby 1.9.3-p327, Passenger 3.0.3, Sinatra 1.3.5, where it worked well.

What can I do?

Answer 1

Add these lines in the relevant places:

require "logger"

logger = Log.new("log/sinatra.log","a+")
logger.sync = true

logger.info("foooooolanito")

Basically your get '/' is fine, but you haven't defined logger anywhere nor have you require d logger .

Let me know if you are thinking something else.

Answer 2

Comment out this line:

$stdout.reopen(log)

I think the cause is that Passenger 4 expects to be able to talk to the workers over STDOUT. However I'm not really sure of the best way to solve the Sinatra logging issue now.