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system exception occurred during an invocation on EJB GuestDao

.java:790) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) at org.apache.catalina.core

UserException - Object User#2 belongs to another EntityManager

.p1.User#2' belongs to another EntityManager at org.apache.openejb.core.ivm.BaseEjbProxyHandler.convertException(BaseEjbProxyHandler.java:363) at org.apache.openejb.core.ivm.BaseEjbProxyHandler.invoke ... .java:601) at org.apache.webbeans.intercept.InvocationContextImpl.proceedCommonAnnots

PersistenceException UserException: Failed to validate persistence.xml

implementations: org.apache.openjpa.persistence.PersistenceProviderImpl, com.objectdb.jpa.Provider from provider: com.objectdb.jpa.Provider at org.apache.myfaces.view.facelets.el.ContextAwareTagMethodExpression.invoke(ContextAwareTagMethodExpression.java:108) at org.apache.myfaces.application

BeanCreationException in spring data JPA with objectDB

(Jetty6RunMojo.java:184) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:133) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) at org

Database is erased after deploying a new web application version

.java:221) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache

Eclipse/JPA Web Application Tutorial

Developers Apache Tomcat Server 6.0 (some modifications

Getting Started with JPA - Maven Project

_download">Getting Started with JPA - Maven Project (3KB) If apache

Spring MVC JPA Tutorial - Maven Project

_download">Spring MVC JPA - Maven Project (8KB) If apache

Step 1: Create a Web Project

>Choose a Project Name (e.g. Guestbook). Select Apache Tomcat

Step 1: Create a Web Project

> Select Apache Tomcat 6 as the Server. Note: You may have to add