I am trying to run the unit tests in eclipse and get the following error. Do I need to turn on an annotation processor? java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: io.undertow.server.protocol.http.HttpRequestParser$$generated at io.undertow.testutils.DefaultServer.runInternal(DefaultServer.java:328) at io.undertow.testutils.DefaultServer.run(DefaultServer.java:245) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run( JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run( TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests( RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests( RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run( RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main( RemoteTestRunner.java:192) Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: io.undertow.server.protocol.http.HttpRequestParser$$generated at io.undertow.server.protocol.http.HttpRequestParser.instance( HttpRequestParser.java:190) at io.undertow.server.protocol.http.HttpOpenListener.<init>( HttpOpenListener.java:63) at io.undertow.testutils.DefaultServer.runInternal(DefaultServer.java:307) ... 7 more Caused by: java.lang.ClassNotFoundException: io.undertow.server.protocol.http.HttpRequestParser$$generated at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at io.undertow.server.protocol.http.HttpRequestParser.instance( HttpRequestParser.java:185) ... 9 more