java - Found class io.netty.buffer.ByteBuf, but interface was expected -

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i have tried several versions of netty-all doesnt seem work. idea going wrong ?

exception in thread "main" java.lang.incompatibleclasschangeerror: found class io.netty.buffer.bytebuf, interface expected     @ org.vertx.java.core.buffer.buffer.<init>(buffer.java:72)     @ org.vertx.java.core.eventbus.impl.defaulteventbus.<clinit>(defaulteventbus.java:58)     @ org.vertx.java.core.impl.defaultvertx.<init>(defaultvertx.java:73)     @ org.vertx.java.core.impl.defaultvertxfactory.createvertx(defaultvertxfactory.java:29)     @ org.vertx.java.core.vertxfactory.newvertx(vertxfactory.java:33)     @ osiam.createuser.main(createuser.java:21)


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