JBoss Wildfly 10：在JBoss 7上调用EJB3.1时，xnio ClassCastException

Question

I'm trying to remote call an EJB3.1 application on a JBoss 7 from a Wildfly 10 via JNDI.

Executing the code from a stand alone java client works perfectly well, deployed in the Wildfly, I receive a ClassCastException:

java.lang.ClassCastException: org.xnio.SingleOption cannot be cast to org.xnio.Option

Here are the properties I'm using:

remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=true
remote.connectionprovider.create.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false
remote.connections=default
remote.connection.default.host=some.server
remote.connection.default.port=4647
remote.connection.default.connect.options.org.xnio.Options.SSL_ENABLED=true
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false
remote.clusters=ejbremote.cluster.ejb.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false
remote.cluster.ejb.connect.options.org.xnio.Options.SSL_ENABLED=true
remote.connection.default.username=user
remote.connection.default.password=password
org.jboss.ejb.client.scoped.context=true
java.naming.factory.url.pkgs=org.jboss.ejb.client.naming

Project has the jboss-as-ejb-client-bom dependency:

<dependency>
    <groupId>org.jboss.as</groupId>
    <artifactId>jboss-as-ejb-client-bom</artifactId>
    <version>7.2.0.Final</version>
    <type>pom</type>
</dependency>

Lookup looks standard:

Context ctx = new InitialContext(properties);
Service service = (Service) ctx.lookup(Service.JNDI_PATH);

Any ideas?

Answer 1

check how you package the application, I suppose that you include the org.xnio libraries in the deployed archives. In this case it will be loaded by different classloaders that cause this error.

Answer 2

Add an jboss-deployment-structure.xml with the following contents to the top level of your WAR:

<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">
  <deployment>
    <dependencies>
      <module name="org.jboss.xnio"></module>
    </dependencies>
  </deployment>
</jboss-deployment-structure>