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Re: Newbie executing app after deployed in Tomcat

by jamesaharvey :: Rate this Message:

I am experiencing the exact same problems (same exception on the same line numbers) and don't know where to begin, b/c the exception is so vague. It would be helpful if more descriptive error messages were provided by JRuby-Rack. Any help would be greatly appreciated.

Damaris wrote:

Hi you all,

I have installed jruby 1.1.2. I've made a simple application (copied from [1]), and this application works fine with Mongrel.

Problems have come when trying to execute it in Tomcat. I have installed Warbler. I have generated the war and copied in tomcat/webapps (such as explained in [2])
When starting Tomcat, the deployment works correctly (without apparent mistakes). But when going to localhost:8080/myapp/posts, I have: "Application initialization failed: null "

In logs I have something like:
29-may-2008 17:18:29 org.apache.catalina.core.ApplicationContext log
GRAVE: Exception caught
java.lang.NullPointerException
at org.jruby.runtime.load.LoadService.findFile(LoadService.java:466)
at org.jruby.runtime.load.LoadService.findLibrary(LoadService.java:391)
at org.jruby.runtime.load.LoadService.smartLoad(LoadService.java:258)
at org.jruby.runtime.load.LoadService.require(LoadService.java:346)
at org.jruby.Ruby.initBuiltins(Ruby.java:1158)
at org.jruby.Ruby.init(Ruby.java:843)
at org.jruby.Ruby.newInstance(Ruby.java:158)
at org.jruby.javasupport.JavaEmbedUtils.initialize(JavaEmbedUtils.java:85)
at org.jruby.rack.DefaultRackApplicationFactory.newRuntime(DefaultRackApplicationFactory.java:79)
at org.jruby.rack.DefaultRackApplicationFactory.createApplication(DefaultRackApplicationFactory.java:144)
at org.jruby.rack.DefaultRackApplicationFactory.newApplication(DefaultRackApplicationFactory.java:44)
at org.jruby.rack.DefaultRackApplicationFactory.getApplication(DefaultRackApplicationFactory.java:52)
at org.jruby.rack.PoolingRackApplicationFactory.getApplication(PoolingRackApplicationFactory.java:92)
at org.jruby.rack.DefaultRackDispatcher.process(DefaultRackDispatcher.java:31)
at org.jruby.rack.RackFilter.doFilter(RackFilter.java:51)

Am i doing something wrong? I mean, do you have any clue about it?

[1] http://blog.emptyway.com/2008/04/08/120-seconds-guide-to-jruby-on-rails/
[2] http://wiki.jruby.org/wiki/Jruby_on_Rails_on_Tomcat (the Rails 2.0 section)

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