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java.lang.NullPointerException at org.glassfish.web.loader.WebappClassLoader.findResourceInternalFromJars(WebappClassLoader.java:3071) at org.glassfish.web.loader.WebappClassLoader.findResourceInternal(WebappClassLoader.java:2924) at org.glassfish.web.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2814) at org.glassfish.web.loader.WebappClassLoader.findClass(WebappClassLoader.java:1229) at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1787) at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1668) at my.package.server.RestAutoRegisterServlet$RegisterRestThread.registerPlugin(RestAutoRegisterServlet.java:100) at my.package.server.RestAutoRegisterServlet$RegisterRestThread.run(RestAutoRegisterServlet.java:87)