<configuration>
    <authentication-client xmlns="urn:elytron:1.0">
        <authentication-rules>
            <rule use-configuration="default"/>
        </authentication-rules>
        <authentication-configurations>
            <configuration name="default">
                <allow-all-sasl-mechanisms/>
            </configuration>
        </authentication-configurations>
    </authentication-client>
    <discovery xmlns="urn:wildfly-discovery:1.0">
        <discovery-provider>
            <static>
                <!-- abstract node -->
                <service uri="node:node01" abstract-type="ejb" abstract-type-authority="jboss">
                    <attribute name="cluster" value="ejb"/>
                </service>
                <!-- concrete node -->
                <service uri="remote+http://localhost:8080" abstract-type="ejb" abstract-type-authority="jboss">
                    <attribute name="node" value="node01"/>
                </service>
            </static>
        </discovery-provider>
    </discovery>
</configuration>

Jun 05, 2017 10:21:20 AM org.jboss.ejb.client.EJBClient <clinit>
INFO: JBoss EJB Client version 4.0.0.Beta30-redhat-1
Exception in thread "main" java.lang.ExceptionInInitializerError
	at org.wildfly.discovery.Discovery.lambda$static$0(Discovery.java:52)
	at org.wildfly.common.context.ContextManager.getPrivileged(ContextManager.java:282)
	at org.jboss.ejb.client.EJBClientContext.getDiscovery(EJBClientContext.java:446)
	at org.jboss.ejb.client.EJBClientContext.discover(EJBClientContext.java:442)
	at org.jboss.ejb.client.EJBClientContext.discoverAffinityNone(EJBClientContext.java:714)
	at org.jboss.ejb.client.EJBClientContext.performLocatedAction(EJBClientContext.java:701)
	at org.jboss.ejb.client.EJBClientContext.createSession(EJBClientContext.java:681)
	at org.jboss.ejb.client.EJBClient.createSession(EJBClient.java:293)
	at org.jboss.ejb.client.EJBRootContext.lookupNative(EJBRootContext.java:154)
	at org.wildfly.naming.client.AbstractContext.lookup(AbstractContext.java:88)
	at org.wildfly.naming.client.WildFlyRootContext.lookup(WildFlyRootContext.java:153)
	at javax.naming.InitialContext.lookup(InitialContext.java:417)
	at org.jboss.as.standaloneejbclient.Main.doLookup(Main.java:746)
	at org.jboss.as.standaloneejbclient.Main.doSingleLookupWildflyConfig(Main.java:82)
	at org.jboss.as.standaloneejbclient.Main.main(Main.java:48)
Caused by: org.wildfly.discovery.InvalidDiscoveryConfigurationException: org.wildfly.client.config.ConfigXMLParseException: CONF0005: Unexpected element "service" in namespace "urn:wildfly-discovery:1.0" encountered
	at file:/home/mvinkler/work/my_apps/rjanik_clusterbench_client/standalone-ejb-client_mvinkler/target/classes/wildfly-config.xml:20:113
	at org.wildfly.discovery.DiscoveryXmlParser.getConfiguredProvider(DiscoveryXmlParser.java:66)
	at org.wildfly.discovery.ConfiguredProvider.<clinit>(ConfiguredProvider.java:48)
	... 15 more
Caused by: org.wildfly.client.config.ConfigXMLParseException: CONF0005: Unexpected element "service" in namespace "urn:wildfly-discovery:1.0" encountered
	at file:/home/mvinkler/work/my_apps/rjanik_clusterbench_client/standalone-ejb-client_mvinkler/target/classes/wildfly-config.xml:20:113
	at org.wildfly.client.config.ConfigurationXMLStreamReader.unexpectedElement(ConfigurationXMLStreamReader.java:245)
	at org.wildfly.discovery.DiscoveryXmlParser.expectEnd(DiscoveryXmlParser.java:499)
	at org.wildfly.discovery.DiscoveryXmlParser.parseDiscoveryProvider(DiscoveryXmlParser.java:224)
	at org.wildfly.discovery.DiscoveryXmlParser.parseDiscoveryElement(DiscoveryXmlParser.java:138)
	at org.wildfly.discovery.DiscoveryXmlParser.parseConfiguration(DiscoveryXmlParser.java:108)
	at org.wildfly.discovery.DiscoveryXmlParser.getConfiguredProvider(DiscoveryXmlParser.java:64)
	... 16 more