in an application I m using JPA + hibernate. However when I m trying to access the db I m getting the following error :
java.lang.NullPointerException: javax.faces.FacesException:
#{loginBean.authenticate}: java.lang.NullPointerException
the exception occurs when i execute the line: EntityManager em = emf.createEntityManager();
Below you see the full serverlog.
18:21:48,174 INFO [org.hibernate.engine.transaction.internal.TransactionFactoryInitiator] (http--0.0.0.0-8080-1) HHH000268: Transaction strategy: org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory
18:21:48,177 INFO [org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory] (http--0.0.0.0-8080-1) HHH000397: Using ASTQueryTranslatorFactory
18:21:48,189 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (http--0.0.0.0-8080-1) HHH000228: Running hbm2ddl schema update
18:21:48,191 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (http--0.0.0.0-8080-1) HHH000102: Fetching database metadata
18:21:48,193 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (http--0.0.0.0-8080-1) HHH000396: Updating schema
18:21:48,195 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (http--0.0.0.0-8080-1) HHH000232: Schema update complete
18:22:08,153 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle] (http--0.0.0.0-8080-1) #{loginBean.authenticate}: java.lang.NullPointerException: javax.faces.FacesException: #{loginBean.authenticate}: java.lang.NullPointerException
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) [jsf-impl-2.1.7-jbossorg-2.jar:]
at javax.faces.component.UICommand.broadcast(UICommand.java:315) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) [jsf-impl-2.1.7-jbossorg-2.jar:]
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.1.7-jbossorg-2.jar:]
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [jsf-impl-2.1.7-jbossorg-2.jar:]
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]
at java.lang.Thread.run(Unknown Source) [rt.jar:1.6.0_32]
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) [jsf-impl-2.1.7-jbossorg-2.jar:]
... 21 more
Caused by: java.lang.NullPointerException
at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.getStatus(JtaStatusHelper.java:73) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.isActive(JtaStatusHelper.java:115) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.engine.transaction.internal.jta.CMTTransaction.join(CMTTransaction.java:149) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1207) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:176) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.ejb.EntityManagerImpl.<init>(EntityManagerImpl.java:89) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:125) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:120) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]
at org.Handlers.UserHandler.getAllUsers(UserHandler.java:32) [classes:]
at org.tutorial.LoginBean.authenticate(LoginBean.java:50) [classes:]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.6.0_32]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) [rt.jar:1.6.0_32]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [rt.jar:1.6.0_32]
at java.lang.reflect.Method.invoke(Unknown Source) [rt.jar:1.6.0_32]
at org.apache.el.parser.AstValue.invoke(AstValue.java:262) [jbossweb-7.0.13.Final.jar:]
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278) [jbossweb-7.0.13.Final.jar:]
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) [jsf-impl-2.1.7-jbossorg-2.jar:]
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
... 22 more
My guess is that, for some reason , it has to do with the entity manager. I m really new to using hibernate and JPA . I also attach a class to show you how I access the db. Could someone figure out what I m doing wrong?
public class ProjectHandler {
public void create(Project project) {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("ResearchManagement.Data");
EntityManager em = emf.createEntityManager();
em.getTransaction().begin();
em.persist(project);
em.getTransaction().commit();
em.close();
}
public List<Project> getAllProjects() {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("ResearchManagement.Data");
EntityManager em = emf.createEntityManager();
em.getTransaction().begin();
Query query = em.createQuery("SELECT p FROM Project p");
List<Project> projects = query.getResultList();
em.getTransaction().commit();
em.close();
return projects;
}
public int deleteByProjectName(String projectName) {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("ResearchManagement.Data");
EntityManager em = emf.createEntityManager();
em.getTransaction().begin();
Query q = em.createQuery("DELETE FROM Project p WHERE p.projectName = :u");
q.setParameter("u", projectName );
int deleted = q.executeUpdate();
em.getTransaction().commit();
em.close();
return deleted;
}
}
Thnx for your answer and your tips about my code.
However I debug my app and I see that the emf is not null .
I still get the error at the line : EntityManager em = emf.createEntityManager();
So my guess is that the emf returns a null entityManager. Still doesnt understand why
What I noticed and looks strange the server log when I run the application. it reads the pesistence unit and connects to the db reading corerclty all the tables:
12:02:06,094 INFO [org.hibernate.validator.util.Version] (MSC service thread 1-3) Hibernate Validator 4.2.0.Final
12:02:06,328 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (MSC service thread 1-3) HHH000228: Running hbm2ddl schema update
12:02:06,328 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (MSC service thread 1-3) HHH000102: Fetching database metadata
12:02:06,328 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (MSC service thread 1-3) HHH000396: Updating schema
12:02:06,343 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000261: Table found: researchprojects.departments
12:02:06,343 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000037: Columns: [phonenumber, departmentid, name, city]
12:02:06,343 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000108: Foreign keys: []
12:02:06,343 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000126: Indexes: [primary]
12:02:06,359 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000261: Table found: researchprojects.employees
12:02:06,359 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000037: Columns: [phonenumber, departmentid, employeeid, lastname, firstname]
12:02:06,359 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000108: Foreign keys: [fk9d39ef85d77ba982]
12:02:06,359 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000126: Indexes: [fk9d39ef85d77ba982, primary]
12:02:06,374 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000261: Table found: researchprojects.partners
12:02:06,374 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000037: Columns: [partnerid, name, contactmail, city]
12:02:06,374 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000108: Foreign keys: []
12:02:06,374 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000126: Indexes: [primary]
12:02:06,374 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000261: Table found: researchprojects.projects
12:02:06,390 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000037: Columns: [departmentid, duration, description, projectname, projectid]
12:02:06,390 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000108: Foreign keys: [fkc479187ad77ba982]
12:02:06,390 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000126: Indexes: [primary, fkc479187ad77ba982]
12:02:06,390 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000261: Table found: researchprojects.projects_has_employees
12:02:06,390 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000037: Columns: [projects_projectid, employees_employeeid]
12:02:06,390 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000108: Foreign keys: [fk294f111bcd3ec025, fk294f111b92772ef4]
12:02:06,390 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000126: Indexes: [fk294f111bcd3ec025, primary, fk294f111b92772ef4]
12:02:06,406 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000261: Table found: researchprojects.projects_has_partners
12:02:06,406 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000037: Columns: [partners_partnerid, projects_projectid]
12:02:06,406 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000108: Foreign keys: [fk8d741055cd3ec025, fk8d7410555290eb4]
12:02:06,406 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000126: Indexes: [fk8d741055cd3ec025, fk8d7410555290eb4, primary]
12:02:06,421 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000261: Table found: researchprojects.users
12:02:06,421 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000037: Columns: [username, userid, password]
12:02:06,421 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000108: Foreign keys: []
12:02:06,421 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000126: Indexes: [primary]
12:02:06,421 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000261: Table found: researchprojects.hibernate_sequence
12:02:06,437 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000037: Columns: [next_val]
12:02:06,437 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000108: Foreign keys: []
12:02:06,437 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (MSC service thread 1-3) HHH000126: Indexes: []
12:02:06,437 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (MSC service thread 1-3) HHH000232: Schema update complete
However when I m trying to read the user table (getallUsers() ) , it creates the emf and at the log i see:
12:03:53,346 INFO [org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory] (http–0.0.0.0-8080-1) HHH000397: Using ASTQueryTranslatorFactory
12:03:53,347 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (http–0.0.0.0-8080-1) HHH000228: Running hbm2ddl schema update
12:03:53,347 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (http–0.0.0.0-8080-1) HHH000102: Fetching database metadata
12:03:53,347 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (http–0.0.0.0-8080-1) HHH000396: Updating schema
12:03:53,347 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (http–0.0.0.0-8080-1) HHH000232: Schema update complete
That means that it cannot read the tables anymore. Does this mean anything to you ?
The error is caused by Hibernate internals,
at org.hibernate.engine.transaction.internal.jta.JtaStatusHelper.getStatus(JtaStatusHelper.java:73)
This likely means that you have an issue with JTA configuration or classes. Since you are attempting to start a user transaction later on, you might have incorrectly marked it as JTA instead of resource_local.
This isn’t a full answer as I’m not familiar with the code, but hope it helps point in the right direction.