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我在學習Ruby on Rails，所以我在我的Mac上安裝了NetBeans。我只是使用標準教程編寫博客應用程序，並完全遵循指示。然而，當我點擊「運行」，我得到以下錯誤：NetBeans第一個項目 - 無法創建JRuby實例
Jan 28, 2011 9:12:32 AM com.sun.enterprise.glassfish.bootstrap.ASMain main
INFO: Launching GlassFish on Felix platform
Welcome to Felix
================
INFO: Perform lazy SSL initialization for the listener 'http-listener-2'
INFO: Grizzly Framework 1.9.18-o started in: 165ms listening on port 8080
INFO: Grizzly Framework 1.9.18-o started in: 4ms listening on port 4848
INFO: Grizzly Framework 1.9.18-o started in: 17ms listening on port 8181
INFO: Starting Grizzly Framework 1.9.18-o - Fri Jan 28 09:12:43 PST 2011
INFO: Grizzly Framework 1.9.18-o started in: 15ms listening on port 3700
INFO: Starting Grizzly Framework 1.9.18-o - Fri Jan 28 09:12:43 PST 2011
INFO: Grizzly Framework 1.9.18-o started in: 42ms listening on port 7676
INFO: GlassFish Server Open Source Edition 3.0.1 (22) startup time : Felix(9534ms) startup services(2418ms) total(11952ms)
INFO: Binding RMI port to *:8686
INFO: Hibernate Validator bean-validator-3.0-JBoss-4.0.2
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: JMXStartupService: Started JMXConnector, JMXService URL = service:jmx:rmi://mac.kitchenpc.local:8686/jndi/rmi://mac.kitchenpc.local:8686/jmxrmi
INFO: Grizzly Framework 1.9.18-o started in: 41ms listening on port 8080
INFO: MNTG0107:Enabling the monitoring for all the stats with level = JRUBY-CONTAINER
INFO: interface org.glassfish.scripting.jruby.config.JrubyContainer
INFO: Running pgtest in development environment.
INFO: Rails application detected.
INFO: Loading application pgtest at /pgtest
INFO: JRuby version is: 1.5.1
INFO: pgtest was successfully deployed in 2,403 milliseconds.
INFO: Using com.sun.enterprise.transaction.jts.JavaEETransactionManagerJTSDelegate as the delegate
INFO: Perform lazy SSL initialization for the listener 'http-listener-2'
INFO: Grizzly Framework 1.9.18-o started in: 12ms listening on port 8181
INFO: [Thread[GlassFish Kernel Main Thread,5,main]] started
INFO: {felix.fileinstall.poll (ms) = 5000, felix.fileinstall.dir = /Applications/NetBeans/glassfish-3.0.1/glassfish/modules/autostart, felix.fileinstall.debug = 1, felix.fileinstall.bundles.new.start = true, felix.fileinstall.tmpdir = /var/folders/Yo/YoZ0GEx3F-izSCKnxBVAU++++TI/-Tmp-/fileinstall--635044837952681835, felix.fileinstall.filter = null}
INFO: New instance of JRuby runtime created in 4,409 milliseconds
INFO: Installed /Applications/NetBeans/glassfish-3.0.1/glassfish/modules/autostart/org.apache.felix.fileinstall-autodeploy-bundles.cfg
INFO: {felix.fileinstall.poll (ms) = 5000, felix.fileinstall.dir = /Applications/NetBeans/glassfish-3.0.1/glassfish/domains/domain1/autodeploy/bundles, felix.fileinstall.debug = 1, felix.fileinstall.bundles.new.start = true, felix.fileinstall.tmpdir = /var/folders/Yo/YoZ0GEx3F-izSCKnxBVAU++++TI/-Tmp-/fileinstall-939562427652715173, felix.fileinstall.filter = null}
INFO: Installed /Applications/NetBeans/glassfish-3.0.1/glassfish/modules/autostart/org.apache.felix.scr.jar
INFO: Installed /Applications/NetBeans/glassfish-3.0.1/glassfish/modules/autostart/osgi-web-container.jar
INFO: Started bundle: file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/autostart/org.apache.felix.scr.jar
INFO: Started bundle: file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/autostart/osgi-web-container.jar
SEVERE: library `socket' could not be loaded: java.lang.LinkageError: loader (instance of java/net/URLClassLoader): attempted duplicate class definition for name: "org/jruby/ext/socket/RubySocket"
from /Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:134:in `process'
from /Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:113:in `run'
from /Users/Mike/NetBeansProjects/pgtest/config/environment.rb:9
from /Users/Mike/NetBeansProjects/pgtest/config/environment.rb:31:in `require'
from /Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/rack/adapter/rails.rb:98:in `load_application'
from file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/rack/adapter/rails.rb:75:in `initialize'
from file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/jruby/rack/rails.rb:25:in `new'
from file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/jruby/rack/rails.rb:25:in `new'
from <script>:1
/Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:271:in `require_frameworks': library `socket' could not be loaded: java.lang.LinkageError: loader (instance of java/net/URLClassLoader): attempted duplicate class definition for name: "org/jruby/ext/socket/RubySocket" (RuntimeError)
from /Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:134:in `process'
from /Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:113:in `run'
from /Users/Mike/NetBeansProjects/pgtest/config/environment.rb:9
from /Users/Mike/NetBeansProjects/pgtest/config/environment.rb:31:in `require'
from /Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/rack/adapter/rails.rb:98:in `load_application'
from file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/rack/adapter/rails.rb:75:in `initialize'
from file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/jruby/rack/rails.rb:25:in `new'
from file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/jruby/rack/rails.rb:25:in `new'
from <script>:1
...internal jruby stack elided...
from Rails::Initializer.require_frameworks(/Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:134)
from Rails::Initializer.process(/Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/initializer.rb:113)
from #<Class:01x72acf534>.run(/Users/Mike/NetBeansProjects/pgtest/config/environment.rb:9)
from (unknown).(unknown)(/Users/Mike/NetBeansProjects/pgtest/config/environment.rb:31)
from Kernel.require(/Applications/NetBeans/NetBeans 6.9.1.app/Contents/Resources/NetBeans/ruby/jruby-1.5.1/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31)
from Kernel.require(file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/rack/adapter/rails.rb:98)
from Rack::Adapter::Rails.load_application(file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/rack/adapter/rails.rb:75)
from Rack::Adapter::Rails.initialize(file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/jruby/rack/rails.rb:25)
from (unknown).new(file:/Applications/NetBeans/glassfish-3.0.1/glassfish/modules/grizzly-jruby.jar!/jruby/rack/rails.rb:25)
from #<Class:01x500d2a4>.new(<script>:1)
from (unknown).(unknown)(:1)
SEVERE: Failed to create JRuby instance.
SEVERE: Failed to create JRuby instance.
INFO: Total number of available updates : 1
INFO: Available updates :
pkg-java 1.122,0-50.2809:20101215T183246Z Wed Dec 15 18:32:46 PST 2010
哦，有一點要提的是，我使用的是Postgres，而不是MySQL的，因爲我好喜歡好它。但是，我認爲這是一個Web服務器問題，與數據庫無關。 – 2011-01-28 17:19:15
這完全是題外話，但你應該知道，使用RoR和Netbeans並不是一個好主意，因爲Oracle [將在Netbeans 7.0中刪除RoR支持]（http://www.h-online.com/open/）新聞/項目/ Oracle的拉-的Ruby-on-Rails的支持 - 從 - 於NetBeans 7-0-1179113.html）。 – darioo 2011-01-28 17:35:22