1

Actually i'm new with Java-ee specification and i'm working on a simple project for training purpose.
The main idea is to create an EJB project named "firstEJB" that contain a simple Java remote, stateless Interface and a simple class for implementation
The second project is a java project in order to use the EJB already deployed on the server, through the context.lookup() method.
The problem is lookup method always throw an exception of type naming exception and i'm pretty sure that i'm using the correct JNDI name.

PS:
- i'm using mac Os x High Sierra as OS
- Wildfly 9.0.2.Final as an application server
- Java SE 1.8
- EJB version 3.2
- Javax 7.0

This is the project Architecture click me

Interface

package com.esprit;

import javax.ejb.Remote;


@Remote
public interface Calculette {

    float add(float a, float b);

}

Implementation

package com.esprit;

import javax.ejb.Stateless;

@Stateful
public class CalculetteImplementation implements Calculette {

    @Override
    public float add(float a, float b) {
        // TODO Auto-generated method stub
        return 0;
    }

}

Client Application main method

package com.calculette.test;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import com.esprit.Calculette;

public class CalculetteTest {


    public static void main(String[] args){


        Context con;
        try {
            con = new InitialContext();
            Object o = con.lookup("/firstEJB/CalculetteImplementation!com.esprit.Calculette");
            Calculette calculette = (Calculette) o;
        } catch (NamingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            e.getCause();
        }


    }

}

JNDI Properties

java.naming.factory.initial=org.jboss.naming.remote.client.InitialContextFactory
java.naming.provider.url=http-remoting://localhost:8080
jboss.naming.client.ejb.context=true

EJB pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.esprit</groupId>
    <artifactId>firstEJB</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>ejb</packaging>

    <properties>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>
    </properties>

    <dependencies>
        <dependency>
            <artifactId>javaee-api</artifactId>
            <groupId>javax</groupId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-ejb-plugin</artifactId>
                <configuration>
                    <ejbVersion>3.2</ejbVersion>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

Client pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.esprit</groupId>
    <artifactId>firstEJBClient</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>


    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.wildfly</groupId>
            <artifactId>wildfly-ejb-client-bom</artifactId>
            <version>9.0.0.Alpha1</version>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>com.esprit</groupId>
            <artifactId>firstEJB</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

</project>

JNDI names on server console

java:global/firstEJB/CalculetteImplementation!com.esprit.Calculette
    java:app/firstEJB/CalculetteImplementation!com.esprit.Calculette
    java:module/CalculetteImplementation!com.esprit.Calculette
    java:global/firstEJB/CalculetteImplementation
    java:app/firstEJB/CalculetteImplementation
    java:module/CalculetteImplementation

Error Exception

Nov 09, 2017 11:53:27 PM org.xnio.Xnio <clinit>
INFO: XNIO version 3.3.0.Beta2
Nov 09, 2017 11:53:27 PM org.xnio.nio.NioXnio <clinit>
INFO: XNIO NIO Implementation Version 3.3.0.Beta2
Nov 09, 2017 11:53:27 PM org.jboss.remoting3.EndpointImpl <clinit>
INFO: JBoss Remoting version 4.0.5.Beta1
Nov 09, 2017 11:53:27 PM org.jboss.ejb.client.remoting.VersionReceiver handleMessage
INFO: EJBCLIENT000017: Received server version 2 and marshalling strategies [river]
Nov 09, 2017 11:53:27 PM org.jboss.ejb.client.remoting.RemotingConnectionEJBReceiver associate
INFO: EJBCLIENT000013: Successful version handshake completed for receiver context EJBReceiverContext{clientContext=org.jboss.ejb.client.EJBClientContext@39c0f4a, receiver=Remoting connection EJB receiver [connection=Remoting connection <7f885430>,channel=jboss.ejb,nodename=souhaibs-macbook-pro]} on channel Channel ID 9edf3d6f (outbound) of Remoting connection 25a18cbc to localhost/127.0.0.1:8080
javax.naming.NameNotFoundException: firstEJB/CalculetteImplementation!com.esprit.Calculette -- service jboss.naming.context.java.jboss.exported.firstEJB."CalculetteImplementation!com.esprit.Calculette"
    at org.jboss.as.naming.ServiceBasedNamingStore.lookup(ServiceBasedNamingStore.java:106)
    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:207)
    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:184)
    at org.jboss.naming.remote.protocol.v1.Protocol$1.handleServerMessage(Protocol.java:127)
    at org.jboss.naming.remote.protocol.v1.RemoteNamingServerV1$MessageReciever$1.run(RemoteNamingServerV1.java:73)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

Standalone.xml file

<?xml version="1.0" ?>

<server xmlns="urn:jboss:domain:3.0">

    <extensions>
        <extension module="org.jboss.as.clustering.infinispan"/>
        <extension module="org.jboss.as.connector"/>
        <extension module="org.jboss.as.deployment-scanner"/>
        <extension module="org.jboss.as.ee"/>
        <extension module="org.jboss.as.ejb3"/>
        <extension module="org.jboss.as.jaxrs"/>
        <extension module="org.jboss.as.jdr"/>
        <extension module="org.jboss.as.jmx"/>
        <extension module="org.jboss.as.jpa"/>
        <extension module="org.jboss.as.jsf"/>
        <extension module="org.jboss.as.logging"/>
        <extension module="org.jboss.as.mail"/>
        <extension module="org.jboss.as.naming"/>
        <extension module="org.jboss.as.pojo"/>
        <extension module="org.jboss.as.remoting"/>
        <extension module="org.jboss.as.sar"/>
        <extension module="org.jboss.as.security"/>
        <extension module="org.jboss.as.transactions"/>
        <extension module="org.jboss.as.webservices"/>
        <extension module="org.jboss.as.weld"/>
        <extension module="org.wildfly.extension.batch"/>
        <extension module="org.wildfly.extension.bean-validation"/>
        <extension module="org.wildfly.extension.io"/>
        <extension module="org.wildfly.extension.request-controller"/>
        <extension module="org.wildfly.extension.security.manager"/>
        <extension module="org.wildfly.extension.undertow"/>
    </extensions>


    <management>
        <security-realms>
            <security-realm name="ManagementRealm">
                <authentication>
                    <local default-user="$local" skip-group-loading="true"/>
                    <properties path="mgmt-users.properties" relative-to="jboss.server.config.dir"/>
                </authentication>
                <authorization map-groups-to-roles="false">
                    <properties path="mgmt-groups.properties" relative-to="jboss.server.config.dir"/>
                </authorization>
            </security-realm>
            <security-realm name="ApplicationRealm">
                <authentication>
                    <local default-user="$local" allowed-users="*" skip-group-loading="true"/>
                    <properties path="application-users.properties" relative-to="jboss.server.config.dir"/>
                </authentication>
                <authorization>
                    <properties path="application-roles.properties" relative-to="jboss.server.config.dir"/>
                </authorization>
            </security-realm>
        </security-realms>
        <audit-log>
            <formatters>
                <json-formatter name="json-formatter"/>
            </formatters>
            <handlers>
                <file-handler name="file" formatter="json-formatter" path="audit-log.log" relative-to="jboss.server.data.dir"/>
            </handlers>
            <logger log-boot="true" log-read-only="false" enabled="false">
                <handlers>
                    <handler name="file"/>
                </handlers>
            </logger>
        </audit-log>
        <management-interfaces>
            <http-interface security-realm="ManagementRealm" http-upgrade-enabled="true">
                <socket-binding http="management-http"/>
            </http-interface>
        </management-interfaces>
        <access-control provider="simple">
            <role-mapping>
                <role name="SuperUser">
                    <include>
                        <user name="$local"/>
                    </include>
                </role>
            </role-mapping>
        </access-control>
    </management>

    <profile>
        <subsystem xmlns="urn:jboss:domain:logging:3.0">
            <console-handler name="CONSOLE">
                <level name="INFO"/>
                <formatter>
                    <named-formatter name="COLOR-PATTERN"/>
                </formatter>
            </console-handler>
            <periodic-rotating-file-handler name="FILE" autoflush="true">
                <formatter>
                    <named-formatter name="PATTERN"/>
                </formatter>
                <file relative-to="jboss.server.log.dir" path="server.log"/>
                <suffix value=".yyyy-MM-dd"/>
                <append value="true"/>
            </periodic-rotating-file-handler>
            <logger category="com.arjuna">
                <level name="WARN"/>
            </logger>
            <logger category="org.apache.tomcat.util.modeler">
                <level name="WARN"/>
            </logger>
            <logger category="org.jboss.as.config">
                <level name="DEBUG"/>
            </logger>
            <logger category="sun.rmi">
                <level name="WARN"/>
            </logger>
            <logger category="jacorb">
                <level name="WARN"/>
            </logger>
            <logger category="jacorb.config">
                <level name="ERROR"/>
            </logger>
            <root-logger>
                <level name="INFO"/>
                <handlers>
                    <handler name="CONSOLE"/>
                    <handler name="FILE"/>
                </handlers>
            </root-logger>
            <formatter name="PATTERN">
                <pattern-formatter pattern="%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n"/>
            </formatter>
            <formatter name="COLOR-PATTERN">
                <pattern-formatter pattern="%K{level}%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n"/>
            </formatter>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:batch:1.0">
            <job-repository>
                <in-memory/>
            </job-repository>
            <thread-pool>
                <max-threads count="10"/>
                <keepalive-time time="30" unit="seconds"/>
            </thread-pool>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:bean-validation:1.0"/>
        <subsystem xmlns="urn:jboss:domain:datasources:3.0">
            <datasources>
                <datasource jndi-name="java:jboss/datasources/ExampleDS" pool-name="ExampleDS" enabled="true" use-java-context="true">
                    <connection-url>jdbc:h2:mem:test;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE</connection-url>
                    <driver>h2</driver>
                    <security>
                        <user-name>sa</user-name>
                        <password>sa</password>
                    </security>
                </datasource>
                <drivers>
                    <driver name="h2" module="com.h2database.h2">
                        <xa-datasource-class>org.h2.jdbcx.JdbcDataSource</xa-datasource-class>
                    </driver>
                </drivers>
            </datasources>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:deployment-scanner:2.0">
            <deployment-scanner path="deployments" relative-to="jboss.server.base.dir" scan-interval="5000" runtime-failure-causes-rollback="${jboss.deployment.scanner.rollback.on.failure:false}"/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:ee:3.0">
            <spec-descriptor-property-replacement>false</spec-descriptor-property-replacement>
            <concurrent>
                <context-services>
                    <context-service name="default" jndi-name="java:jboss/ee/concurrency/context/default" use-transaction-setup-provider="true"/>
                </context-services>
                <managed-thread-factories>
                    <managed-thread-factory name="default" jndi-name="java:jboss/ee/concurrency/factory/default" context-service="default"/>
                </managed-thread-factories>
                <managed-executor-services>
                    <managed-executor-service name="default" jndi-name="java:jboss/ee/concurrency/executor/default" context-service="default" hung-task-threshold="60000" core-threads="5" max-threads="25" keepalive-time="5000"/>
                </managed-executor-services>
                <managed-scheduled-executor-services>
                    <managed-scheduled-executor-service name="default" jndi-name="java:jboss/ee/concurrency/scheduler/default" context-service="default" hung-task-threshold="60000" core-threads="2" keepalive-time="3000"/>
                </managed-scheduled-executor-services>
            </concurrent>
            <default-bindings context-service="java:jboss/ee/concurrency/context/default" datasource="java:jboss/datasources/ExampleDS" managed-executor-service="java:jboss/ee/concurrency/executor/default" managed-scheduled-executor-service="java:jboss/ee/concurrency/scheduler/default" managed-thread-factory="java:jboss/ee/concurrency/factory/default"/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:ejb3:3.0">
            <session-bean>
                <stateful default-access-timeout="5000" cache-ref="simple" passivation-disabled-cache-ref="simple"/>
                <singleton default-access-timeout="5000"/>
            </session-bean>
            <pools>
                <bean-instance-pools>
                    <strict-max-pool name="slsb-strict-max-pool" max-pool-size="20" instance-acquisition-timeout="5" instance-acquisition-timeout-unit="MINUTES"/>
                    <strict-max-pool name="mdb-strict-max-pool" max-pool-size="20" instance-acquisition-timeout="5" instance-acquisition-timeout-unit="MINUTES"/>
                </bean-instance-pools>
            </pools>
            <caches>
                <cache name="simple"/>
                <cache name="distributable" passivation-store-ref="infinispan" aliases="passivating clustered"/>
            </caches>
            <passivation-stores>
                <passivation-store name="infinispan" cache-container="ejb" max-size="10000"/>
            </passivation-stores>
            <async thread-pool-name="default"/>
            <timer-service thread-pool-name="default" default-data-store="default-file-store">
                <data-stores>
                    <file-data-store name="default-file-store" path="timer-service-data" relative-to="jboss.server.data.dir"/>
                </data-stores>
            </timer-service>
            <remote connector-ref="http-remoting-connector" thread-pool-name="default"/>
            <thread-pools>
                <thread-pool name="default">
                    <max-threads count="10"/>
                    <keepalive-time time="100" unit="milliseconds"/>
                </thread-pool>
            </thread-pools>
            <default-security-domain value="other"/>
            <default-missing-method-permissions-deny-access value="true"/>
            <log-system-exceptions value="true"/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:io:1.1">
            <worker name="default"/>
            <buffer-pool name="default"/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:infinispan:3.0">
            <cache-container name="server" default-cache="default" module="org.wildfly.clustering.server">
                <local-cache name="default">
                    <transaction mode="BATCH"/>
                </local-cache>
            </cache-container>
            <cache-container name="web" default-cache="passivation" module="org.wildfly.clustering.web.infinispan">
                <local-cache name="passivation">
                    <locking isolation="REPEATABLE_READ"/>
                    <transaction mode="BATCH"/>
                    <file-store passivation="true" purge="false"/>
                </local-cache>
                <local-cache name="persistent">
                    <locking isolation="REPEATABLE_READ"/>
                    <transaction mode="BATCH"/>
                    <file-store passivation="false" purge="false"/>
                </local-cache>
            </cache-container>
            <cache-container name="ejb" default-cache="passivation" module="org.wildfly.clustering.ejb.infinispan" aliases="sfsb">
                <local-cache name="passivation">
                    <locking isolation="REPEATABLE_READ"/>
                    <transaction mode="BATCH"/>
                    <file-store passivation="true" purge="false"/>
                </local-cache>
                <local-cache name="persistent">
                    <locking isolation="REPEATABLE_READ"/>
                    <transaction mode="BATCH"/>
                    <file-store passivation="false" purge="false"/>
                </local-cache>
            </cache-container>
            <cache-container name="hibernate" default-cache="local-query" module="org.hibernate.infinispan">
                <local-cache name="local-query">
                    <eviction strategy="LRU" max-entries="10000"/>
                    <expiration max-idle="100000"/>
                </local-cache>
                <local-cache name="entity">
                    <transaction mode="NON_XA"/>
                    <eviction strategy="LRU" max-entries="10000"/>
                    <expiration max-idle="100000"/>
                </local-cache>
                <local-cache name="timestamps"/>
            </cache-container>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:jaxrs:1.0"/>
        <subsystem xmlns="urn:jboss:domain:jca:3.0">
            <archive-validation enabled="true" fail-on-error="true" fail-on-warn="false"/>
            <bean-validation enabled="true"/>
            <default-workmanager>
                <short-running-threads>
                    <core-threads count="50"/>
                    <queue-length count="50"/>
                    <max-threads count="50"/>
                    <keepalive-time time="10" unit="seconds"/>
                </short-running-threads>
                <long-running-threads>
                    <core-threads count="50"/>
                    <queue-length count="50"/>
                    <max-threads count="50"/>
                    <keepalive-time time="10" unit="seconds"/>
                </long-running-threads>
            </default-workmanager>
            <cached-connection-manager/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:jdr:1.0"/>
        <subsystem xmlns="urn:jboss:domain:jmx:1.3">
            <expose-resolved-model/>
            <expose-expression-model/>
            <remoting-connector/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:jpa:1.1">
            <jpa default-datasource="" default-extended-persistence-inheritance="DEEP"/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:jsf:1.0"/>
        <subsystem xmlns="urn:jboss:domain:mail:2.0">
            <mail-session name="default" jndi-name="java:jboss/mail/Default">
                <smtp-server outbound-socket-binding-ref="mail-smtp"/>
            </mail-session>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:naming:2.0">
            <remote-naming/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:pojo:1.0"/>
        <subsystem xmlns="urn:jboss:domain:remoting:3.0">
            <endpoint worker="default"/>
            <http-connector name="http-remoting-connector" connector-ref="default" security-realm="ApplicationRealm"/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:resource-adapters:3.0"/>
        <subsystem xmlns="urn:jboss:domain:request-controller:1.0"/>
        <subsystem xmlns="urn:jboss:domain:sar:1.0"/>
        <subsystem xmlns="urn:jboss:domain:security-manager:1.0">
            <deployment-permissions>
                <maximum-set>
                    <permission class="java.security.AllPermission"/>
                </maximum-set>
            </deployment-permissions>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:security:1.2">
            <security-domains>
                <security-domain name="other" cache-type="default">
                    <authentication>
                        <login-module code="Remoting" flag="optional">
                            <module-option name="password-stacking" value="useFirstPass"/>
                        </login-module>
                        <login-module code="RealmDirect" flag="required">
                            <module-option name="password-stacking" value="useFirstPass"/>
                        </login-module>
                    </authentication>
                </security-domain>
                <security-domain name="jboss-web-policy" cache-type="default">
                    <authorization>
                        <policy-module code="Delegating" flag="required"/>
                    </authorization>
                </security-domain>
                <security-domain name="jboss-ejb-policy" cache-type="default">
                    <authorization>
                        <policy-module code="Delegating" flag="required"/>
                    </authorization>
                </security-domain>
            </security-domains>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:transactions:3.0">
            <core-environment>
                <process-id>
                    <uuid/>
                </process-id>
            </core-environment>
            <recovery-environment socket-binding="txn-recovery-environment" status-socket-binding="txn-status-manager"/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:undertow:2.0">
            <buffer-cache name="default"/>
            <server name="default-server">
                <http-listener name="default" socket-binding="http" redirect-socket="https"/>
                <host name="default-host" alias="localhost">
                    <location name="/" handler="welcome-content"/>
                    <filter-ref name="server-header"/>
                    <filter-ref name="x-powered-by-header"/>
                </host>
            </server>
            <servlet-container name="default">
                <jsp-config/>
                <websockets/>
            </servlet-container>
            <handlers>
                <file name="welcome-content" path="${jboss.home.dir}/welcome-content"/>
            </handlers>
            <filters>
                <response-header name="server-header" header-name="Server" header-value="WildFly/9"/>
                <response-header name="x-powered-by-header" header-name="X-Powered-By" header-value="Undertow/1"/>
            </filters>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:webservices:2.0">
            <wsdl-host>${jboss.bind.address:127.0.0.1}</wsdl-host>
            <endpoint-config name="Standard-Endpoint-Config"/>
            <endpoint-config name="Recording-Endpoint-Config">
                <pre-handler-chain name="recording-handlers" protocol-bindings="##SOAP11_HTTP ##SOAP11_HTTP_MTOM ##SOAP12_HTTP ##SOAP12_HTTP_MTOM">
                    <handler name="RecordingHandler" class="org.jboss.ws.common.invocation.RecordingServerHandler"/>
                </pre-handler-chain>
            </endpoint-config>
            <client-config name="Standard-Client-Config"/>
        </subsystem>
        <subsystem xmlns="urn:jboss:domain:weld:2.0"/>
    </profile>

    <interfaces>
        <interface name="management">
            <inet-address value="${jboss.bind.address.management:127.0.0.1}"/>
        </interface>
        <interface name="public">
            <inet-address value="${jboss.bind.address:127.0.0.1}"/>
        </interface>
        <interface name="unsecure">
            <inet-address value="${jboss.bind.address.unsecure:127.0.0.1}"/>
        </interface>
    </interfaces>

    <socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}">
        <socket-binding name="management-http" interface="management" port="${jboss.management.http.port:9990}"/>
        <socket-binding name="management-https" interface="management" port="${jboss.management.https.port:9993}"/>
        <socket-binding name="ajp" port="${jboss.ajp.port:8009}"/>
        <socket-binding name="http" port="${jboss.http.port:8080}"/>
        <socket-binding name="https" port="${jboss.https.port:8443}"/>
        <socket-binding name="txn-recovery-environment" port="4712"/>
        <socket-binding name="txn-status-manager" port="4713"/>
        <outbound-socket-binding name="mail-smtp">
            <remote-destination host="localhost" port="25"/>
        </outbound-socket-binding>
    </socket-binding-group>

</server>
BenFarhat Souhaib
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1 Answers1

1

You must use fully qualified name on client side lookup. Eg.

java:global/firstEJB/CalculetteImplementation!com.esprit.Calculette

Please note, you can use solution described in Code to list all the entries in jndi on remote machine to make sure, EJB bean is successfully registered.

Bedla
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  • Thanks dude, this worked for me, I was following a tutorial that does not use the full jndi name, but by adding "java:global" there is no more exception. – BenFarhat Souhaib Nov 12 '17 at 14:03