Hi, On Fri, Oct 28, 2016 at 9:42 AM, Elias Antolinos Garcia <[email protected]> wrote: > Hi community! > > I am trying to load an example where I change messages between Ros and Java. > I have add all the libraries that I have found, but I always get the > following exception: > > Exception in thread "main" java.lang.NullPointerException > at > org.eclipse.jetty.websocket.common.extensions.AbstractExtension.getName(AbstractExtension.java:90) > at > org.eclipse.jetty.websocket.api.extensions.ExtensionFactory.<init>(ExtensionFactory.java:37) > at > org.eclipse.jetty.websocket.common.extensions.WebSocketExtensionFactory.<init>(WebSocketExtensionFactory.java:40) > at > org.eclipse.jetty.websocket.client.WebSocketClient.<init>(WebSocketClient.java:85) > at > org.eclipse.jetty.websocket.client.WebSocketClient.<init>(WebSocketClient.java:78) > at ros.RosBridge.connect(RosBridge.java:113) > at tests.RosTest.main(RosTest.java:27) > > > These are the libraries: > > com.fasterxml.jackson.core.jar > jetty-websocket-8.0.0.v20110901.jar > com.fasterxml.jackson.databind.jar > websocket-api-9.0.0.rc0.jar > websocket-client-9.0.3.v20130506.jar > websocket-client-9.0.3.v20130506-hybrid.jar > websocket-client-9.0.2.v20130417.jar > websocket-client-9.0.2.v20130417-hybrid.jar > websocket-client-9.1.0.m0-hybrid.jar > jetty-util-9.0.0.rc0.jar > jetty-io-9.0.0.m1.jar > websocket-common-9.0.0.rc1.jar > java_rosbridge.jar > java_rosbridge_all.jar > jetty-all.jar > jetty-all-9.2.6.v20141205.jar
Please note you have a weird number of different versions of the Jetty libraries. Pick one version only, we recommend you stay on the latest, 9.3.13.v20161014. Don't use the jetty*-all.jar versions. Once you have only one version for all the Jetty libraries, try again. -- Simone Bordet ---- http://cometd.org http://webtide.com Developer advice, training, services and support from the Jetty & CometD experts. _______________________________________________ jetty-users mailing list [email protected] To change your delivery options, retrieve your password, or unsubscribe from this list, visit https://dev.eclipse.org/mailman/listinfo/jetty-users
