Index: extras/rails/src/main/java/com/sun/enterprise/rails/RailsContainer.java
===================================================================
--- extras/rails/src/main/java/com/sun/enterprise/rails/RailsContainer.java	(revision 17640)
+++ extras/rails/src/main/java/com/sun/enterprise/rails/RailsContainer.java	(working copy)
@@ -60,6 +60,7 @@
         String jrubyHome = System.getProperty("jruby.home");
         String jrubyShell = System.getProperty("jruby.shell");
         String jrubyScript = System.getProperty("jruby.script");
+        String jrubyRuntime = System.getProperty("jruby.runtime");
 
         if (jrubyHome == null) {
             logger.severe("jruby.home cannot be null");
@@ -85,6 +86,11 @@
             jrubyLib = (new File(jrubyHome, "lib")).getPath();
             System.setProperty("jruby.lib", jrubyLib);
         }
+        if (jrubyRuntime == null) {
+            jrubyRuntime = "1";
+            System.setProperty("jruby.runtime", jrubyRuntime);
+        }
+        numberOfRuntime = Integer.parseInt(jrubyRuntime);
         
         initializeRubyRuntime();