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PODouble pound (##) in path name doesn't work with JRuby 'require'?
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  1. PODouble pound (##) in path name doesn't work with JRuby 'require'?
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    copied!<p>So, I'm attempting to deploy my JRuby on Rails app to Tomcat 7. Everything works fine.</p> <p>Until I tried using Tomcat's Parallel Deployment feature, which requires that the context/war name be of the form <code>name##VERSION.war</code>.</p> <p>JRuby chokes on this the first time I try to require a file with a <code>##</code> in the path, with the following stacktrace:</p> <pre><code>org.jruby.rack.RackInitializationException: no !/ in spec from file:/opt/apache-tomcat-7.0.23/webapps/my-application##0001/WEB-INF/lib/jruby-rack-1.1.2.jar!/vendor/rack.rb:7:in `(root)' from org/jruby/RubyKernel.java:1038:in `require' from file:/opt/apache-tomcat-7.0.23/webapps/my-application##0001/WEB-INF/lib/jruby-rack-1.1.2.jar!/vendor/rack.rb:28:in `boot!' from file:/opt/apache-tomcat-7.0.23/webapps/my-application##0001/WEB-INF/lib/jruby-rack-1.1.2.jar!/jruby/rack/boot/rack.rb:10:in `Rack' from file:/opt/apache-tomcat-7.0.23/webapps/my-application##0001/WEB-INF/lib/jruby-rack-1.1.2.jar!/jruby/rack/boot/rack.rb:8:in `(root)' from org/jruby/RubyKernel.java:1063:in `load' from file:/opt/apache-tomcat-7.0.23/webapps/my-application##0001/WEB-INF/lib/jruby-rack-1.1.2.jar!/jruby/rack/boot/rack.rb:1:in `(root)' at org.jruby.rack.DefaultRackApplicationFactory$4.init(DefaultRackApplicationFactory.java:206) at org.jruby.rack.DefaultRackApplicationFactory.newErrorApplication(DefaultRackApplicationFactory.java:102) at org.jruby.rack.DefaultRackApplicationFactory.getErrorApplication(DefaultRackApplicationFactory.java:66) at org.jruby.rack.SharedRackApplicationFactory$1.call(SharedRackApplicationFactory.java:33) at org.jruby.rack.AbstractRackDispatcher.process(AbstractRackDispatcher.java:30) at org.jruby.rack.AbstractFilter.doFilter(AbstractFilter.java:31) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:298) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) </code></pre> <p>As the stack trace indicates, it seems to be blowing up on the require. Can JRuby just not handle paths of this form? Is there any way I can get around this issue, or is it a fundamental conflict between JRuby and Tomcat's naming convention?</p> <p><strong>UPDATE</strong></p> <p>I attached a debugger to Tomcat, and the problem goes all the way down to the way java.net.URL parses URL strings:</p> <pre><code>new URL("jar:file:/opt/apache-tomcat-7.0.23/webapps/my-app##001/WEB-INF/lib/jruby-rack-1.1.2.jar!/vendor/rack-1.3.6/rack.rb") </code></pre> <p>This blows up with a MalformedURLException. But:</p> <pre><code>new URL("jar:file:/opt/apache-tomcat-7.0.23/webapps/my-app/WEB-INF/lib/jruby-rack-1.1.2.jar!/vendor/rack-1.3.6/rack.rb") </code></pre> <p>This is identical except for the <code>##001</code> in the application name, and it works fine.</p> <p>These are invoked on line 1145 of org.jruby.runtime.load.LoadService in JRuby, by the way.</p> <p>So what are the ramifications of this? Well, for one thing, it looks like Tomcat may have made a poorly considered choice in the characters it uses to indicate names, if it gives trouble to URL parsing. I'm not sure if JRuby can work around this easily.</p> <p>Thoughts, anyone?</p> <p><strong>FURTHER UPDATE</strong></p> <p>You can make it work if you URL escape the hashes. ## becomes %23%23. This will need to be patched in JRuby itself, however, I think.</p>
 

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