jpa,jboss,classpath,classcastexception,wildfly-8 , Wildfly 8 - Multiple EAR - ClassCastException

Wildfly 8 - Multiple EAR - ClassCastException


Tag: jpa,jboss,classpath,classcastexception,wildfly-8

I've been trying to fix an issue for some time now.

I have two EAR files being deployed to Wildfly 8.1.0 with the same EJB.jar and the same JPA.jar, but with seperate EJB.jars for 'Scheduling' A.K.A running the different functions within the EJBs. The schedulers access the EJB.jars which in turn access the JPA.jars. Both EARs/JPAs use the same database.

The layout of the two EARs are as follows:



Everything deploys fine, but after a few minutes of the schedulers running I get a ClassCastException for user defined classes. Example:

java.lang.ClassException: persistence.Foo cannot be cast to persistence.Foo

I have tried playing around with Dependency, Class-Path and EAR isolation techniques but cannot fix my issue.

The issue only occurs when both EARs are deployed and running, individually they run without any issues.

Any suggestions would be welcome. Thanks in advance.


I don't know how Jboss handles persistence-Units with same name internally, but it seems there is some process of sharing between those. One of your JPA.jars already holds an object in the cache, and later the other JPA.jar tries to reuse it.

Application-servers create their own classloader for each ear/war. You try to pass an object from war1 to war2 and war2 tries to cast the object, but can't.

Solution: Create an EAR containg your JPA and EJB.jar and deploy both schedular-jars.

your deployment-folder would look like this:

.) Backend.ear

.) Schedular1.jar

.) Schedular2.jar


Failed to execute goal on project. Unable to find POM in project

I am trying to build an application having following dependency. <properties> <>7.5.0.Final-redhat-21</> </properties> <dependencies> <dependency> <groupId></groupId> <artifactId>jboss-as-jms-client-bom</artifactId> <version>${}</version> <type>pom</type> </dependency> </dependencies> This is an example which i found on Red Hat Site -...

Envers Pre/PostCollection Listener

I use Hibernate Envers with conditional logging. The documentation describes quite well how this can be done ( At 2nd item, it says you have to subclass the appropriate listeners.. The purpose of the three listeners EnversPostDeleteEventListener, EnversPostInsertEventListener and EnversPostUpdateEventListener is clear to me. However, I am not quite clear...

Why JPA entities are treated like this outside a session?

Hy, I am having a "Solve failed to lazily initialize a collection of role.... exception" in jpa. I understand that outside a session, when you want to retrieve a lazy collection if there is not session bound you will get this error, fine. But what I dont understand is if...

How to load file in a Seam Application using web.xml context-param

I have a seam web application in which I have to include a security module for integrated authentication. I can see that the module isn't based on seam application because it uses a spring-like notation. As the module works defining a listener and a properties file in the web.xml I...

Spring 4 + JPA (Hibernate 4) + JTA transaction manager doesn't flush automatically

I am migrating an application from Spring 3.0.5 + JPA 2.0 to Spring 4 + JPA (Hibernate 4) I have followed the migration guide : The application is using a JTA transaction manager : a Jencks / GeronimoPlatformTransactionManager (because of transactions distributed on datasources and ESB). The Spring /...

JPQL In clause error - Statement too complex

Following is the code which is blowing up if the list which is being passed in to "IN" clause has several values. In my case the count is 1400 values. Also the customer table has several thousands (arround 100,000) of records in it. The query is executing against DERBY database....

Write a Java Program to connect to HornetQ Messaging Service in Jboss EAP 6.3?

I am using Jboss EAP 6.3 and need to use Messaging facility. I have worked in Jboss 4x, where we can make connection easily using following code: public static final String PROVIDER_URL = "jnp://localhost:5445"; public static final String JNP_INTERFACES = "org.jboss.naming:org.jnp.interfaces"; public static final String INITIAL_CONTEXT_FACTORY = "org.jnp.interfaces.NamingContextFactory"; private static...

How to Fetch Data using Spring Data

Hey i want to create a repository extending JpaRepository and fetch result without writing actual query, In my example i have 2 tables Book and Author mapped by many to many relationship, suppose i want to fetch list of books by a particular author_id, since in my book entity, i...

Can I make this request more efficient using index?

I have this bean/table "Userinfo" with columns id, username, and twitchChannel. For most userinfo the twitchChannel column will be null. I'm going through every userinfo entity in the table and search the column twitchChannel, if the column is not null I put the twitchChannel in an array. this is what...

Hibernate/JPA: Check generated sql before updating DB Schema (like .NET EF migrations)

So i am trying to learn Hibernate/JPA and i was wondering if there is something similar to .NET's Entity Framework migrations that i can use. I like Code First (Class -> Schema) approach, but the auto generated sql queries may do strange (and dangerous) things to a database. I want...

Java JPA EM.createNativeQuery(sql, someClass).getResultList()

How do I return a list of foobar as below? @MappedSuperclass public abstract class foobar{} @Entity @Table(name="foobar") public class foo extends foobar{} @Entity @Table(name="foobar") public class bar extends foobar{} List<foobar> results = em.createNativeQuery("SELECT * FROM foobar").getResultList(); Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to foobar....

performance of executing openjpa query

I have a rest web app with cxf 3.0.1 framework and openjpa 2.3.0. The web.xml: <web-app xmlns="" xmlns:xsi="" xsi:schemaLocation=""> <display-name>Mobile app rest services</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>WEB-INF/cxf-servlet.xml</param-value>...

Not persisted entity with Hibernate

I have created this code: Sale sale = new Sale(); saleService.create(sale); Vendor vendor = new Vendor("name"); Sale updatedSale = saleService.findById(sale.getId()); updatedSale.setVendor(vendor); try { saleService.update(updatedSale); } catch (EntityNotFoundException ex) { System.err.println(""); } Also, sale is in cascade with vendor: @ManyToOne(cascade={CascadeType.PERSIST,CascadeType.REFRESH}, targetEntity = Vendor.class) @Cascade({ org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.PERSIST })...

What are Relational Objects?

I am referring to this for learning JPA ,Here a table is given In query row what is relational object they are referring to? Are they the objects of entity classes which I am making or something else....

@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) doesn't work

I need to delete a list of employees ignoring any integrity constraints (i.e. successfully delete the entity that doesn't related to any others yet or skip the entity that related to others) using JPA 2.0 and EJB3.0 on glassfish3.0: I iterated on the list and call entity manager in a...

JPA AccessType.Property failing to retrieve value from nested classes

I'm attempting to parse JSON into an @Entity in order to persist the data in a table. I confirmed the parsing works but I have run into an issue when attempting to persist the data. In order to retrieve the needed value in the nested classes (two deep) I am...

Sqlite JPA Primary Key error

Hello i have a Problem with Sqlite and JPA. I have the following table in Sqlite: Section: secID INTEGER Primary Key secname TEXT If I use Primary Key in Sqlite this Value will automatically updated when i insert a value like INSERT INTO Section(secname) VALUES("Default"); In my Java Classes i...

Hibernate Query cache invalidation

I am using Hibernate(with JPA) in an application that has a high write-read ratio. For caching I have enabled query-cache and hibernate second level cache(ehcache). The problem I am facing is due to automatic query cache invalidation when an update is done. Is there any way to configure query cache...

Segregating the read-only and read-write in Spring/J2EE Apps

We using Spring, Spring-Data and JPA in our project. For production servers, we would like to setup database cluster such that all read queries are directed to one server and all write queries are directed to another server. This obviously will require some changes in the way the DAOs are...

Get id column name from POJO, using reflection

@Entity @Table(name="MY_TABLE") public class MyTable{ @Id @Column(name="MY_TABLE_ID") @GeneratedValue(strategy = GenerationType.AUTO ,generator="SQ_MY_TABLE") @SequenceGenerator(name="SQ_MY_TABLE", sequenceName="SQ_MY_TABLE") private Long myTableId; How can I, using reflection, get the primary key column name from my POJO, defined with the javax.persistence.Id annotation? I'd have to find the @Id and then get the name property of the @Column...

very high float value changing to infinity while retrieving from database

I have an entry in my database select item_numeric_value from Item_Allowed_Values where id=761 datatype of item_numeric_value is float in my db. the result I get is 1.11111111111111E+49. when I retrieve this value in java in a string , I get infinity. is there anything I am missing or doing wrong ?...

Spring Data JPA user posts

I have user login and profile view, I would like the users to have posts. Can someone guide me in the right direction? I have a user entity: @Entity @Table(name = "usr", indexes = { @Index(columnList = "email", unique = true) }) // using usr because in may conflict with...

Is it possible to have “connection preparation” with Spring / JPA persistency

I have a Spring CrudRepository that is just an interface, and I have a persistence context class where I have defined my data source: @Configuration @EnableTransactionManagement public class PersistenceContext { @Bean(name="dataSource", destroyMethod = "close") public DataSource dataSource() throws SQLException { return ... public interface DataRepository extends CrudRepository<Data, Long> { Data...

JPA persit creates new existing entity in many to one relation

I'm new in JPA and I have de following Entities in my project : Animal entity : package; import; import javax.persistence.*; @Entity @NamedQueries({ @NamedQuery(name="Animal.findAll", query="SELECT a FROM Animal a"), @NamedQuery(name="Animal.findAllByTypeId", query="SELECT a FROM Animal a WHERE = :id"), }) public class Animal implements Serializable { private static...

All I want is to access a H2 mem database in Websphere V8 using JPA 2.0

I've been struggling with this for days now and I searched dozens of articles in StackOverflow and other dev sites. I used the Deployment Manager interface to configure a Websphere Application Server with a H2 JDBC provider and a Data Source for my application using a tutorial I've found...

Checking for multiple child constraint violations in Hibernate/JPA

TL;DR: Is it possible to perform nested transactions in Hibernate that use SavePoints to rollback to specific states? So I am attempting to persist a parent entity with a OneToMany mapping to child entities. This is working fine. During this persistence, I would like to catch and log ALL constraint...

java.lang.AbstractMethodError: org.jboss.arquillian.config.descriptor.impl.EngineDefImpl.getDeploymentExportExploded()Ljava/lang/Boolean;

When I try to deploy my artifact during integration test I'm getting this error. @RunWith(ArquillianSputnik) class WebServiceTest extends Specification { @Deployment static WebArchive createDeployment() { ShrinkWrap.createFromZipFile(WebArchive.class, new File("target/project.war")) } } where arquillian.xml is: <arquillian xmlns="" xmlns:xsi="" xsi:schemaLocation="

@Resource datasource breaking DB connection

I recently wrote a class, in my web application, for parsing a huge XML file and feed a db table with its content. My application is running on Wildfly9, and uses JPA with Hibernate provider to handle a MySQL DB. The AS configuration is pretty standard, I just added my...

JPA NamedNativeQuery syntax error with Hibernate, PostgreSQL 9

I am having a rather odd problem. I have native query which runs perfectly when executed on sql server: SELECT date_time, GREATEST(sum(count_up - count_down) OVER (PARTITION BY date_trunc('day', result.date_time) ORDER BY date_time),0) AS cum_amt FROM peoplecounting.result order BY date_time; However, using this query as native query in JPA results in...

Wildfly Kafka clients module javax/management/JMException not found

I'm try to create Kafka clients module for Wildfly. Here is module.xml: <?xml version="1.0" encoding="UTF-8"?> <module xmlns="urn:jboss:module:1.0" name="org.apache.kafka.clients"> <resources> <resource-root path="kafka-clients-"/> <resource-root path="lz4-1.2.0.jar"/> <resource-root path="snappy-java-"/> </resources> <dependencies> <module name="org.slf4j"/> </dependencies> </module> Wildfly (8.2.0-Final) gives this error on boot:...

Making an efficient query with 7 joins, JPA or SQL? What type of collection?

folks! Had to performance tune an expensive JPA query with 7 joins, taking 42 seconds to complete locally and ~3 minutes in the remote server (AWS). SELECT res FROM Resultado res JOIN res.panoramica pan JOIN pan.gondolaId gon JOIN gon.visitaId vis JOIN vis.estabelecimentoId estab JOIN estab.cliente cli JOIN res.configuracaoAnalise ca JOIN...

Configure HikariCP + Hibernate + GuicePersist(JPA) at Runtime

I have a java8 desktop app using GuicePersist, Hibernate, and HikariCP to communicate with a Postgres DB. I've had success getting my app to send/receive data to the DB using this META-INF/persistence.xml: <?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="" version="2.0"> <!-- A JPA Persistence Unit --> <persistence-unit name="myJPAunit" transaction-type="RESOURCE_LOCAL"> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>...

How To find a WebSocket from a REST bean

I have a javascript client that connects to a server via websockets and sends data via ajax to a server. Once the server finished processing the data, I want to send a message via the websocket to the client. Problem is: How do I find the WebSocket from the REST...

Blocking Updating or Inserting an Entity when using Cascade in Hibernate

I have an entity , EntHesaplasma , this entity has a relationship with EntCariHareketler entity. I have a foreign key in the EntHesaplasma entity for EntCariHareketler. I want to set a relationship between them , but I dont want to update,insert or remove operations on EntCariHareketler entity. Only I want...

Valid “protocols” for HornetQ

I have some code like this for connecting to HornetQ. Properties properties = new Properties(); properties.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory"); properties.put(Context.PROVIDER_URL, "remote://"); properties.put(Context.SECURITY_PRINCIPAL, "user"); properties.put(Context.SECURITY_CREDENTIALS, "pwd"); ConnectionFactory connectionFactory = null; Destination destination = null; try { Context context = new InitialContext(properties); I inherited this, and am trying to get a...

Cache inconsistency - Entity not always persisted in cached Collection

I'm having an issue where a Validation instance is added to a Collection on a Step instance. Declaration is as follows: Step class: @Entity @Table @Cacheable @Cache(usage = CacheConcurrencyStrategy.READ_WRITE) public class Step extends AbstractEntity implements ValidatableStep { @OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true) @JoinColumn(name = "step_id", nullable...

Transaction error in Spring

I have a project in Spring MVC + JPA, initially worked with the Spring configuration through XML. Now I am trying to set up the project through JAVA Config (without XML). The project starts, but when I create a new user(entity User), an error transaction. But if I create...

Unidirectional one-to-many mapping in Hibernate generates redundant updates

I have defined two classes, Parent and Child. The parent can have a list of children. @Entity public class Parent { @Id @GeneratedValue(...) @SequenceGenerator(...) private long id; @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL) @JoinColumn(name = "parent_id", referencedColumnName = "id", nullable = false) private List<Child> children; public Parent() { children =...

org.hibernate.ejb.event.EJB3MergeEventListener missing after upgrading from Hibernate 3 to 4.3.9

I am trying to upgrade from Hibernate 3.6.10 to 4.3.9 (and JPA 2.0 to 2.1). Some code in my application uses the org.hibernate.ejb.event.EJB3MergeEventListener class, which used to be in the hibernate-entitymanager jar, but is missing from the 4.3.9 version. From what I can tell, it was removed as of 4.3,...

Use alternative producers of EntityManager / EMF in integration tests

I looking for way how to use CDI and alternative producers in integration tests. When i speak about producers, i mean EMF producer. Reason for different EMF producer is that i want to use testing in-memory database (different persistence unit). Is there easy way how to start CDI for integrations...

How to know an object has changed compared to database

I need to know if some fields of a model object has been changed before save because I need to compare the new values with the old ones. I can't touch the model classes are they are generated. My problem is that whenever I change an object in a controller...

OpenJPA OneToMany and composite key in parent and child table

I have tables with composited primary key. Server(key=ServerId) ServerId|Name 1 |server1 2 |server2 ParentObj(key=ServerId+Code) ServerId|Code |Title 1 |code1|value1 1 |code2|value2 2 |code1|Value2b ChildObj(key=ServerId+Code+Name) ServerId|Code |Name |Value 1 |code1|prop1|val1 1 |code1|prop2|val2 1 |code2|prop1|val1b 2 |code1|prop3|val3 This is Java beans I have. @Entity @Table(name="ParentObj") @Access(AccessType.FIELD) @IdClass(value=ParentObj.PK.class) @XmlAccessorType(XmlAccessType.PUBLIC_MEMBER) @XmlRootElement public class ParentObj {...

How to deploy WildFly datasource with Arquillian?

I tried to deploy my datasource as follows: @Deployment(name = "test", order=2) static WebArchive createDeployment() { ShrinkWrap.createFromZipFile(WebArchive, new File("target/test.war")).addAsWebInfResource(new File("src/test/resources/test-DS.xml"), "test-DS.xml") } but it seems that my datasource is ignored, I see no info about deployment in jboss console. Is there any other possibility to deploy datasource with arquillian? @Deployment(name...

Retrieve the id of an Entity object as soon as the entity was instantiated?

Is there a way in JPA to retrieve the id of an Entity object as soon as the entity was instantiated? e.g Person person = new Person(); Currently i am using in my entity class the following strategy: @GeneratedValue(strategy = GenerationType.IDENTITY) If not is there a "Dummy Id" strategy for...

JPA and Apache Aries: persistence unit unresolved dependency

I'm trying to configure a datasource for mysql and a corresp. persistence bundle on top of Apache Aries. This is the datasource's blueprint file <bean id="mysqlDataSource" class="com.mysql.jdbc.jdbc2.optional.MysqlDataSource"> <property name="url" value="jdbc:mysql://matteos-mbp:3306/" /> <property name="user" value="root" /> <property name="password" value="root" /> <property name="databaseName" value="testDBBlueprint" /> <property name="createDatabaseIfNotExist" value="true" /> </bean> <bean...

JPA annotation for MS SQL Server 2008 R2 IDENTITY column

I want to know proper JPA annotation setup to handle MS Server 2008 R2 IDENTITY column. MS Server 2008 R2 (RTM) doesn't support SEQUENCE, but the IDENTITY gives auto increment when I tested by raw sql. However, by JPA I can't make it work by any strategy (IDENTITY, AUTO, TABLE)...

Refactoring some legacy camel code, is this code unnecessary or am I missing something?

I'm refactoring some apache camel legacy code in a JBoss Fuse instance and I've run into some code that I'm not sure what it's purpose is for. <when condition> <loadBalance id="someVar"> <failover roundRobin="true" maximumFailoverAttempts="3" /> <to uri="fabric:FABRICENDPOINT" /> </loadBalance> </when> I haven't used Fabric's load balancer before but from what...

multiple update with jpa

I need to upgrade a field of several records in bd. How to do this with JPA?. I tried the following but not working: @Override public String estadoPedido(List<DetallePedido> lista) { int cod; String mensage = null; for (DetallePedido ped : lista) { cod = ped.getIdDetalle(); EntityManager em = emf.createEntityManager(); DetallePedido...

Optimistic locking not throwing exception when manually setting version field

I have a Spring Boot 1.3.M1 web application using Spring Data JPA. For optimistic locking, I am doing the following: Annotate the version column in the entity: @Version private long version;. I confirmed, by looking at the database table, that this field is incrementing properly. When a user requests an...