java.lang.NoClassDefFoundError: io/netty/channel/group/ChannelMatchers

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Samebug tips

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Expert tip

A few things cause this exception:
1) Check if you have all jars and if they're in the correct path.
2) Your classpath might be broken, you can define it in the command line with java -cp yourClassPath or at your IDE if you're using one.

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you can change your scala version to 2.11.11

Solutions on the web

via GitHub by almibe
, 1 year ago
io/netty/channel/group/ChannelMatchers
via Google Groups by as_ku...@yahoo.com (JIRA), 9 months ago
via Google Groups by glon.se...@free.fr (JIRA), 10 months ago
java.lang.NoClassDefFoundError: io/netty/channel/group/ChannelMatchers
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at io.netty.channel.group.DefaultChannelGroup.close(DefaultChannelGroup.java:226)
at io.vertx.core.http.impl.HttpServerImpl.actualClose(HttpServerImpl.java:506)
at io.vertx.core.http.impl.HttpServerImpl.close(HttpServerImpl.java:420)
at io.vertx.core.impl.ContextImpl.runCloseHooks(ContextImpl.java:148)
at io.vertx.core.impl.DeploymentManager$DeploymentImpl.lambda$null$2(DeploymentManager.java:532)
at io.vertx.core.impl.FutureImpl.checkCallHandler(FutureImpl.java:158)
at io.vertx.core.impl.FutureImpl.complete(FutureImpl.java:111)
at my.example.RestServerVerticle.stop(RestServerVerticle.java:51)
at io.vertx.core.impl.DeploymentManager$DeploymentImpl.lambda$doUndeploy$3(DeploymentManager.java:547)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:339)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:393)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:742)
at java.lang.Thread.run(Thread.java:745)

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