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POHibernate join tables duplicate entry - Could not execute JDBC batch update
 

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  1. POHibernate join tables duplicate entry - Could not execute JDBC batch update
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    <p>I have a simple domain class Licensee:</p> <pre><code>@Entity @Table(name = "LICENSEE") @Cache(usage = CacheConcurrencyStrategy.READ_WRITE) public class Licensee implements Serializable, Comparable { private Integer id; private String orgName; /* ... */ private Set&lt;Address&gt; address = new HashSet&lt;Address&gt;(); @Id @Column(name = "ID") @GeneratedValue(generator = "increment") @GenericGenerator(name = "increment", strategy = "org.hibernate.id.IncrementGenerator") public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @Column(name = "ORGNAME") public String getOrgName() { return orgName; } public void setOrgName(String orgName) { this.orgName = orgName; } /* ... */ @OneToMany @Cascade({org.hibernate.annotations.CascadeType.ALL, org.hibernate.annotations.CascadeType.DELETE_ORPHAN}) @JoinTable(name = "LICENSEEADDRESS", joinColumns = { @JoinColumn(name = "LICENSEEID", unique = true) }, inverseJoinColumns = { @JoinColumn(name = "ADDRESSID") } ) public Set&lt;Address&gt; getAddress() { return address; } public void setAddress(Set&lt;Address&gt; address) { this.address = address; } public void addAddress(Address address) { this.address.add(address); } } </code></pre> <p>which holds a reference to a Set of Address objects. I'm using the @JoinTable annotation for the db relation between the two classes. I have hibernate.hbm2ddl set to create which creates the join table LICENSEEADDRESS with a composite key consisting of the LICENSEEID and the ADDRESSID as expected. However, when I call saveOrUpdate on a Licensee object with more than one Address object in the Set at a time, I get this:</p> <pre><code>java.sql.BatchUpdateException: Duplicate entry '1' for key 2 com.mysql.jdbc.ServerPreparedStatement.executeBatch(ServerPreparedStatement.java:647) org.apache.commons.dbcp.DelegatingStatement.executeBatch(DelegatingStatement.java:297) org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70) org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268) org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:266) org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:171) org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50) org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027) org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:365) org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137) org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:655) org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:732) org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:701) org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321) org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) $Proxy18.saveLicensee(Unknown Source) net.grouplink.gilf.web.controllers.LicenseeFormController.onSubmit(LicenseeFormController.java:64) org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:267) org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:265) org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:511) javax.servlet.http.HttpServlet.service(HttpServlet.java:710) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) </code></pre> <p>So the second query in the batch isn't completed because it thinks there is a duplicate key, which is true for that one column. But with a composite key, wouldn't both ids need to be the same to cause a constraint violation? What am I missing here?</p>
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