Can't publish in cometd channel - server-push

Question

I'm getting this error when I try to publish a string in a channel:
java.lang.AbstractMethodError: org.cometd.client.BayeuxClient$BayeuxClientChannel.publish(Ljava/lang/Object;)V
this is the code that is trying to publish:
public class EnviadorMensagem implements Runnable {
private String nomeCanal;
private Mensagem mensagem;
private ClientSession cliente;
private boolean pausado = true;
private boolean cancelado = false;
#Override
public void run() {
while (pausado) {
pausar();
}
if (!cancelado) {
converterEEnviar();
}
}
private void pausar() {
synchronized (this) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private void converterEEnviar() {
ConversorMensagem conversor = new ConversorMensagem();
ClientSessionChannel canal = cliente.getChannel(nomeCanal);
canal.publish(conversor.converter(mensagem)); //<- the error happens here!!
}
public void ativar() {
synchronized (this) {
pausado = false;
this.notifyAll();
}
}
public void cancelar() {
synchronized (this) {
cancelado = true;
}
ativar();
}
public void setNomeCanal(String nomeCanal) {
this.nomeCanal = nomeCanal;
}
public void setMensagem(Mensagem mensagem) {
this.mensagem = mensagem;
}
public void setCliente(ClientSession cliente) {
this.cliente = cliente;
}
}
As you can see, this class is running in a separate thread.
this is part of my pom.xml:
<dependencies>
<dependency>
<groupId>org.cometd.java</groupId>
<artifactId>cometd-java-client</artifactId>
<version>2.5.1</version>
</dependency>
<dependency>
<groupId>org.cometd.java</groupId>
<artifactId>bayeux-api</artifactId>
<version>2.5.1</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-client</artifactId>
<version>8.1.7.v20120910</version>
</dependency>
</dependencies>
Someone knows how to solve it??

Answer 1

You get AbstractMethodError when you compiled your code against a version of a library, but at runtime you are using another, that does not have that method, or has it with a different signature.
Double check your classpath and the CometD library versions you're using.