Почему Rufus планирует работу дважды?

Question

Шаги для репликации:

1. Создание нового проекта Rails. (рельсы 3.2.22.5)
2. Добавить зависимостей (камышевки, грабли, Руфус-планировщик) (/ Gemfile)
3. JRuby 9.1.7.0
4. Создание новых файлов. (/config/warble.rb) (/web.xml.erb) (/config/intializers/scheduler_rufus.rb)
5. Создайте исполняемый файл войны с веб-сервером причала. (warble war RAILS_ENV = разработка)
6. Запустить исполняемый файл. (java -jar mywar.war)
7. Планировщик выполняет задание 2 раза.

/Gemfile:

source 'https://rubygems.org' 

gem 'rails', '3.2.22.5' 

# Bundle edge Rails instead: 
# gem 'rails', :git => 'git://github.com/rails/rails.git' 

gem 'activerecord-jdbcsqlite3-adapter' 

gem 'jruby-openssl' 

gem 'warbler' 

gem 'rake', '11.3.0' 

gem 'rufus-scheduler', '~> 3.3', '>= 3.3.3' 
# Gems used only for assets and not required 
# in production environments by default. 
group :assets do 
    gem 'sass-rails', '~> 3.2.3' 
    gem 'coffee-rails', '~> 3.2.1' 

    # See https://github.com/sstephenson/execjs#readme for more supported runtimes 
    gem 'therubyrhino' 

    gem 'uglifier', '>= 1.0.3' 
end 

gem 'jquery-rails' 

# To use ActiveModel has_secure_password 
# gem 'bcrypt-ruby', '~> 3.0.0' 

# To use Jbuilder templates for JSON 
# gem 'jbuilder' 

# Use unicorn as the app server 
# gem 'unicorn' 

# Deploy with Capistrano 
# gem 'capistrano' 

# To use debugger 
# gem 'debugger' 

/config/warble.rb

# Disable Rake-environment-task framework detection by uncommenting/setting to false 
# Warbler.framework_detection = false 

# Warbler web application assembly configuration file 
Warbler::Config.new do |config| 
    # Features: additional options controlling how the jar is built. 
    # Currently the following features are supported: 
    # - *gemjar*: package the gem repository in a jar file in WEB-INF/lib 
    # - *executable*: embed a web server and make the war executable 
    # - *runnable*: allows to run bin scripts e.g. `java -jar my.war -S rake -T` 
    # - *compiled*: compile .rb files to .class files 
    config.features = %w(executable) 

    # Application directories to be included in the webapp. 
    config.dirs = %w(app config db lib log script vendor tmp) 

    # Additional files/directories to include, above those in config.dirs 
    config.includes = FileList["web.xml.erb"] 

    # Additional files/directories to exclude 
    # config.excludes = FileList["lib/tasks/*"] 

    # Additional Java .jar files to include. Note that if .jar files are placed 
    # in lib (and not otherwise excluded) then they need not be mentioned here. 
    # JRuby and JRuby-Rack are pre-loaded in this list. Be sure to include your 
    # own versions if you directly set the value 
    # config.java_libs += FileList["lib/java/*.jar"] 

    # Loose Java classes and miscellaneous files to be included. 
    # config.java_classes = FileList["target/classes/**.*"] 

    # One or more pathmaps defining how the java classes should be copied into 
    # the archive. The example pathmap below accompanies the java_classes 
    # configuration above. See http://rake.rubyforge.org/classes/String.html#M000017 
    # for details of how to specify a pathmap. 
    # config.pathmaps.java_classes << "%{target/classes/,}p" 

    # Bundler support is built-in. If Warbler finds a Gemfile in the 
    # project directory, it will be used to collect the gems to bundle 
    # in your application. If you wish to explicitly disable this 
    # functionality, uncomment here. 
    # config.bundler = false 

    # An array of Bundler groups to avoid including in the war file. 
    # Defaults to ["development", "test", "assets"]. 
    # config.bundle_without = [] 

    # Other gems to be included. If you don't use Bundler or a gemspec 
    # file, you need to tell Warbler which gems your application needs 
    # so that they can be packaged in the archive. 
    # For Rails applications, the Rails gems are included by default 
    # unless the vendor/rails directory is present. 
    # config.gems += ["activerecord-jdbcmysql-adapter", "jruby-openssl"] 
    # config.gems << "tzinfo" 

    # Uncomment this if you don't want to package rails gem. 
    # config.gems -= ["rails"] 

    # The most recent versions of gems are used. 
    # You can specify versions of gems by using a hash assignment: 
    # config.gems["rails"] = "4.2.5" 

    # You can also use regexps or Gem::Dependency objects for flexibility or 
    # finer-grained control. 
    # config.gems << /^sinatra-/ 
    # config.gems << Gem::Dependency.new("sinatra", "= 1.4.7") 

    # Include gem dependencies not mentioned specifically. Default is 
    # true, uncomment to turn off. 
    # config.gem_dependencies = false 

    # Array of regular expressions matching relative paths in gems to be 
    # excluded from the war. Defaults to empty, but you can set it like 
    # below, which excludes test files. 
    # config.gem_excludes = [/^(test|spec)\//] 

    # Pathmaps for controlling how application files are copied into the archive 
    # config.pathmaps.application = ["WEB-INF/%p"] 

    # Name of the archive (without the extension). Defaults to the basename 
    # of the project directory. 
    config.jar_name = "mywar" 

    # File extension for the archive. Defaults to either 'jar' or 'war'. 
    config.jar_extension = "war" 

    # Destionation for the created archive. Defaults to project's root directory. 
    # config.autodeploy_dir = "dist/" 

    # Name of the MANIFEST.MF template for the war file. Defaults to a simple 
    # MANIFEST.MF that contains the version of Warbler used to create the war file. 
    # config.manifest_file = "config/MANIFEST.MF" 

    # When using the 'compiled' feature and specified, only these Ruby 
    # files will be compiled. Default is to compile all \.rb files in 
    # the application. 
    # config.compiled_ruby_files = FileList['app/**/*.rb'] 

    # Determines if ruby files in supporting gems will be compiled. 
    # Ignored unless compile feature is used. 
    # config.compile_gems = false 

    # When set it specify the bytecode version for compiled class files 
    # config.bytecode_version = "1.6" 

    # When set to true, Warbler will override the value of ENV['GEM_HOME'] even it 
    # has already been set. When set to false it will use any existing value of 
    # GEM_HOME if it is set. 
    # config.override_gem_home = true 

    # Allows for specifing custom executables 
    # config.executable = ["rake", "bin/rake"] 

    # Sets default (prefixed) parameters for the executables 
    # config.executable_params = "do:something" 

    # If set to true, moves jar files into WEB-INF/lib. Prior to version 1.4.2 of Warbler this was done 
    # by default. But since 1.4.2 this config defaults to false. It may need to be set to true for 
    # web servers that do not explode the WAR file. 
    # Alternatively, this option can be set to a regular expression, which will 
    # act as a jar selector -- only jar files that match the pattern will be 
    # included in the archive. 
    # config.move_jars_to_webinf_lib = false 

    # === War files only below here === 

    # Embedded webserver to use with the 'executable' feature. Currently supported 
    # webservers are: 
    # - *jetty* - Embedded Jetty from Eclipse 
    config.webserver = 'jetty' 

    # Path to the pre-bundled gem directory inside the war file. Default 
    # is 'WEB-INF/gems'. Specify path if gems are already bundled 
    # before running Warbler. This also sets 'gem.path' inside web.xml. 
    # config.gem_path = "WEB-INF/vendor/bundler_gems" 

    # Files for WEB-INF directory (next to web.xml). This contains 
    # web.xml by default. If there is an .erb-File it will be processed 
    # with webxml-config. You may want to exclude this file via 
    # config.excludes. 
    # config.webinf_files += FileList["jboss-web.xml"] 

    # Files to be included in the root of the webapp. Note that files in public 
    # will have the leading 'public/' part of the path stripped during staging. 
    # config.public_html = FileList["public/**/*", "doc/**/*"] 

    # Pathmaps for controlling how public HTML files are copied into the .war 
    # config.pathmaps.public_html = ["%{public/,}p"] 

    # Value of RAILS_ENV for the webapp -- default as shown below 
    config.webxml.rails.env = ENV['RAILS_ENV'] || 'production' 

    # Public ROOT mapping, by default assets are copied into .war ROOT directory. 
    # config.public.root = '' 

    # Application booter to use, either :rack or :rails (autodetected by default) 
    # config.webxml.booter = :rails 

    # When using the :rack booter, "Rackup" script to use. 
    # - For 'rackup.path', the value points to the location of the rackup 
    # script in the web archive file. You need to make sure this file 
    # gets included in the war, possibly by adding it to config.includes 
    # or config.webinf_files above. 
    # - For 'rackup', the rackup script you provide as an inline string 
    # is simply embedded in web.xml. 
    # The script is evaluated in a Rack::Builder to load the application. 
    # Examples: 
    # config.webxml.rackup.path = 'WEB-INF/hello.ru' 
    # config.webxml.rackup = %{require './lib/demo'; run Rack::Adapter::Camping.new(Demo)} 
    # config.webxml.rackup = require 'cgi' && CGI::escapeHTML(File.read("config.ru")) 

    # Control the pool of Rails runtimes. Leaving unspecified means 
    # the pool will grow as needed to service requests. It is recommended 
    # that you fix these values when running a production server! 
    # If you're using threadsafe! mode, you probably don't want to set these values, 
    # since 1 runtime(default for threadsafe mode) will be enough. 
    config.webxml.jruby.min.runtimes = 2 
    config.webxml.jruby.max.runtimes = 4 

    # JNDI data source name 
    # config.webxml.jndi = 'jdbc/rails' 
end 

/web.xml.erb

<web-app xmlns="http://java.sun.com/xml/ns/javaee" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
     version="3.0"> 
    <!-- 
    <display-name>Uncomment and put name :here: for Tomcat Dashboard</display-name>--> 

    <%# NOTE: to be renamed to servlet_context_params %> 
    <%- webxml.context_params.each do |name, value| -%> 
    <context-param> 
    <param-name><%= name %></param-name> 
    <param-value><%= value %></param-value> 
    </context-param> 
    <%- end -%> 

    <%- if webxml.respond_to?(:servlet_filter) -%> 
    <filter> 
    <filter-name><%= webxml.servlet_filter_name %></filter-name> 
    <filter-class><%= webxml.servlet_filter %></filter-class> 
    <async-supported><%= !! webxml.servlet_filter_async %></async-supported> 
    </filter> 
    <filter-mapping> 
    <filter-name><%= webxml.servlet_filter_name %></filter-name> 
    <url-pattern><%= webxml.servlet_filter_url_pattern %></url-pattern> 
    </filter-mapping> 
    <%- else -%> <%# NOTE: due compatibility when warbler gets downgraded to 2.0.0 %> 
    <filter> 
    <filter-name>RackFilter</filter-name> 
    <filter-class>org.jruby.rack.RackFilter</filter-class> 
    <async-supported>true</async-supported> 
    </filter> 
    <filter-mapping> 
    <filter-name>RackFilter</filter-name> 
    <url-pattern>/*</url-pattern> 
    </filter-mapping> 
    <%- end -%> 

    <%- if webxml.respond_to?(:servlet_context_listeners) -%> 
    <%- webxml.servlet_context_listeners.each do |listener| -%> 
    <listener> 
    <listener-class><%= listener %></listener-class> 
    </listener> 
    <%- end -%> 
    <%- else -%> <%# NOTE: due compatibility when warbler gets downgraded to 2.0.0 %> 
    <listener> 
    <listener-class><%= webxml.servlet_context_listener %></listener-class> 
    </listener> 
    <%- end -%> 

    <%- [webxml.jndi].flatten.each do |jndi| -%> 
    <resource-ref> 
    <res-ref-name><%= jndi %></res-ref-name> 
    <res-type>javax.sql.DataSource</res-type> 
    <res-auth>Container</res-auth> 
    </resource-ref> 
    <%- end if webxml.jndi -%> 
</web-app> 

/config/initializers/scheduler_rufus.rb

require 'rufus-scheduler' 

scheduler = Rufus::Scheduler.singleton 

unless defined?(Rails::Console) || File.split($0).last == 'rake' 
    # only schedule when not running from the Ruby on Rails console 
    # or from a rake task 

    scheduler.in '1m' do 
     puts 'Hello World' 
    end 
end 

Answer 1

Rufus-scheduler планировал два раза, потому что на моем сервере приложений было 2 Ruby. Я должен был ограничить до 1 времени выполнения.

Изменить пул Rails времени работы в /config/warble.rb

config.webxml.jruby.min.runtimes = 1 
config.webxml.jruby.max.runtimes = 1