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Editorial Team
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Asked: 2026-06-03T06:04:13+00:00

i’m working with a java enterprise application that connects to a postresql database, and

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i’m working with a java enterprise application that connects to a postresql database, and in the log file appears this error

javax.ejb.EJBException
at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:3894)
at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:3794)
at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:3596)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1379)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1316)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:205)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:127)
at $Proxy120.create(Unknown Source)
at com.mirodinero.web.servlets.setMisDatos.processRequest(setMisDatos.java:111)
at com.mirodinero.web.servlets.setMisDatos.doGet(setMisDatos.java:140)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:315)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:288)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:647)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:579)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:831)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)

Caused by: javax.persistence.EntityExistsException:
Exception Description: Cannot persist detached object [com.mirodinero.entidad.DatosUsuario[idUsuario=Miguel LLorente]].
Class> com.mirodinero.entidad.DatosUsuario Primary Key> [Miguel LLorente]
at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerImpl.persist(EntityManagerImpl.java:224)
at com.sun.enterprise.util.EntityManagerWrapper.persist(EntityManagerWrapper.java:440)
at com.mirodinero.sesionBean.DatosUsuarioFacade.create(DatosUsuarioFacade.java:30)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.enterprise.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1011)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:175)
at com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:2920)
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4011)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:197)
… 33 more
Caused by: Exception [TOPLINK-7231] (Oracle TopLink Essentials – 2.1 (Build b60e-fcs (12/23/2008))): oracle.toplink.essentials.exceptions.ValidationException
Exception Description: Cannot persist detached object [com.mirodinero.entidad.DatosUsuario[idUsuario=Miguel LLorente]].
Class> com.mirodinero.entidad.DatosUsuario Primary Key> [Miguel LLorente]
at oracle.toplink.essentials.exceptions.ValidationException.cannotPersistExistingObject(ValidationException.java:2171)
at oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl.registerNotRegisteredNewObjectForPersist(UnitOfWorkImpl.java:3257)
at oracle.toplink.essentials.internal.ejb.cmp3.base.RepeatableWriteUnitOfWork.registerNotRegisteredNewObjectForPersist(RepeatableWriteUnitOfWork.java:432)
at oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl.registerNewObjectForPersist(UnitOfWorkImpl.java:3226)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerImpl.persist(EntityManagerImpl.java:221)
… 44 more

and this:

javax.persistence.NoResultException: getSingleResult() did not retrieve any entities.
at oracle.toplink.essentials.internal.ejb.cmp3.EJBQueryImpl.throwNoResultException(EJBQueryImpl.java:274)
at oracle.toplink.essentials.internal.ejb.cmp3.base.EJBQueryImpl.getSingleResult(EJBQueryImpl.java:513)
at com.mirodinero.sesionBean.DatosUsuarioFacade.findById(DatosUsuarioFacade.java:57)
at sun.reflect.GeneratedMethodAccessor560.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.enterprise.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1011)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:175)
at com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:2920)
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4011)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:197)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:127)
at $Proxy120.findById(Unknown Source)
at com.mirodinero.web.servlets.setMisDatos.processRequest(setMisDatos.java:96)
at com.mirodinero.web.servlets.setMisDatos.doGet(setMisDatos.java:140)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:315)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:288)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:647)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:579)
at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:831)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)

so i went to check the file where the error appears and the code looks like this:

public DatosUsuario findById(String id) {
    DatosUsuario du = null;
    try {
        du = (DatosUsuario) em.createNamedQuery("DatosUsuario.findByIdUsuario").setParameter("idUsuario", id).getSingleResult();
    } catch (Exception nre) {
        log.error("No existe el usuario: " + id + ", ex: ", nre);
    } finally {
        log.debug("du: " + du);
        return du;
    }
}

does anybody know where the error is? because in my webpage it looks like it saves the data 2 out of 3 times.

yes, actually the EntityExistExpection is given here:

public void create(DatosUsuario datosUsuario) {
    em.persist(datosUsuario);  // in this line
}

public void edit(DatosUsuario datosUsuario) {
    em.merge(datosUsuario);
}

public void remove(DatosUsuario datosUsuario) {
    em.remove(em.merge(datosUsuario));
}

but i guess it is needed to create the new user, right? or should it check if the user exist and then just edit the data? how can it be done?

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1 Answer

  1. Editorial Team

    The EntityExistsException is likely thrown because you need to do a em.merge() instead of em.persist().

    You should create a save() method to be invoked by your client when the entity is not new and needs to be saved.

    public void save(DatosUsuario datosUsuario) {
    em.merge(datosUsuario);
}

    Alternatively, you can keep the create() method and check if the entity has been persisted yet. Entities with an @Id and @GeneratedValue(strategy=GenerationType.AUTO) will have the ID only when persisted. So something like this could work:

    public void createOrSave(DatosUsuario datosUsuario) {
    if (datosUsuario.getId() == null){
        em.persist(datosUsuario);
    }
    else{
        em.merge(datosUsuario);
    }
}
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