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POHibernate entity generates weird sql and tries to save duplicate entries
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I have the following entity <pre><code>@Entity @Table(name="mail_event") @Cacheable(false) public class MailEvent extends DomainObject { private static final long serialVersionUID = 1L; @Id @GeneratedValue private Long id; @JoinTable(name="mail_event_recipients") @ManyToMany(fetch=FetchType.EAGER) private Set<User> recipients = new HashSet<User>(); @Column(length=255) @Basic(optional=false) private String subject; @Column(length=255) @Basic(optional=false) private String fromName; @Column(length=255) @Basic(optional=false) private String fromEmail; @Lob @Basic(optional=false) private String messageBody; /* * Any users that should appear in the reply-to part of the email header are added here */ @JoinTable(name="mail_event_reply_to") @ManyToMany(fetch=FetchType.EAGER) private Set<User> replyTo = new HashSet<User>(); public MailEvent(){} public MailEvent( final String subject, final String messageBody, final User recipient, final String fromName, final String fromEmail){ this(subject,messageBody,recipient,fromName,fromEmail,null); } public MailEvent( final String subject, final String messageBody, final Collection<User> recipients, final String fromName, final String fromEmail){ this(subject,messageBody,recipients,fromName,fromEmail,null); } public MailEvent( final String subject, final String messageBody, final User recipient, final String fromName, final String fromEmail, final Collection<User> replyTo){ this.subject = subject; this.messageBody = messageBody; this.recipients.add(recipient); this.fromName = fromName; this.fromEmail = fromEmail; if( replyTo != null ) this.replyTo.addAll(replyTo); } public MailEvent( final String subject, final String messageBody, final Collection<User> recipients, final String fromName, final String fromEmail, final Collection<User> replyTo ){ this.subject = subject; this.messageBody = messageBody; this.recipients.addAll(recipients); this.fromName = fromName; this.fromEmail = fromEmail; if( replyTo != null ) this.replyTo.addAll(replyTo); } public Long getId() { return id; } public Set<User> getRecipients() { return recipients; } public void setRecipients(Set<User> recipients) { this.recipients = recipients; } public void setSubject(String subject) { this.subject = subject; } public String getSubject() { return subject; } public String getFromName() { return fromName; } public void setFromName(String fromName) { this.fromName = fromName; } public String getFromEmail() { return fromEmail; } public void setFromEmail(String fromEmail) { this.fromEmail = fromEmail; } public String getMessageBody() { return messageBody; } public void setMessageBody(String messageBody) { this.messageBody = messageBody; } public Set<User> getReplyTo() { return replyTo; } public void setReplyTo(Set<User> replyTo) { this.replyTo = replyTo; } @Override public int hashCode() { final int weight = 31; int result = 17; result = weight * result + ((id == null) ? 0 : (int) (id ^ (id >>> 32))); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (this.getClass() != obj.getClass()) return false; MailEvent other = (MailEvent) obj; if (id == null) { if (other.id != null) return false; } else if (!id.equals(other.id)) return false; return true; } } </code></pre> From which Hibernate generates the following tables: <ul> <li><a href="http://imageshack.us/photo/my-images/190/hib1.png/" rel="nofollow">http://imageshack.us/photo/my-images/190/hib1.png/</a></li> <li><a href="http://imageshack.us/photo/my-images/151/hib2.png/" rel="nofollow">http://imageshack.us/photo/my-images/151/hib2.png/</a></li> <li><a href="http://imageshack.us/photo/my-images/208/hib3.png/" rel="nofollow">http://imageshack.us/photo/my-images/208/hib3.png/</a></li> </ul> Why do I get indexes that are equal? Also, when I try to save objects of this class, I get this exception: <pre><code>2012 Jan 12 13:18:42,980[ERROR] - RequestCycle - Could not execute JDBC batch update; SQL [insert into mail_event_recipients (mail_event_id, recipients_id) values (?, ?)]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update org.springframework.dao.DataIntegrityViolationException: Could not execute JDBC batch update; SQL [insert into mail_event_recipients (mail_event_id, recipients_id) values (?, ?)]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:637) at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:102) at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:471) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754) at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723) at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at $Proxy84.save(Unknown Source) at se.su.dsv.scipro.data.controllers.impl.NotificationControllerImpl.processNotification(NotificationControllerImpl.java:111) at se.su.dsv.scipro.data.controllers.impl.NotificationControllerImpl.notifyConferencePost(NotificationControllerImpl.java:181) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.wicket.proxy.LazyInitProxyFactory$JdkHandler.invoke(LazyInitProxyFactory.java:414) at org.apache.wicket.proxy.$Proxy1.notifyConferencePost(Unknown Source) at se.su.dsv.scipro.conference.panels.ConferencePanel$SendWallMessageForm$1.onSubmit(ConferencePanel.java:324) at org.apache.wicket.ajax.markup.html.form.AjaxButton$1.onSubmit(AjaxButton.java:101) at org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:143) at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:177) at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:302) at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:157) at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92) at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250) at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329) at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436) at org.apache.wicket.RequestCycle.request(RequestCycle.java:545) at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486) at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:319) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:113) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:662) Caused by: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:96) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:183) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1206) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:375) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137) at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:76) at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:467) ... 44 more Caused by: java.sql.BatchUpdateException: Duplicate entry '11642' for key 'PRIMARY' at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:2020) at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:1451) at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268) ... 53 more </code></pre> Which leads me to believe that Hibernate tries to use the ids that are already in use for new objects. How can I fix this? EDIT: The problem seems to be that for some reason, Im not allowed to enter the same recipients_id in mail_event_recipients more than once. Why does this contraint exist and how can I get rid of it?
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Hibernate entity generates weird sql and tries to save duplicate entries
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