I recently had: java.lang.NoSuchMethodError: org.jboss.netty.handler.codec.frame.LengthFieldBasedFrameDecoder.<init>(IIIIIZ)V happening to me when I attempted to container:start (from xsbt-web-plugin) within an sbt session on a Spray/spray-servlet application. I was going to great lengths to search my $CLASSPATH and dependency’s transitive dependencies to determine what was relying on an older version of Netty causing the Datastax driver to fail. I […]