org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1

Question

I am using struts and hibernate. I have a parent and child relation using set in hbm. In the action I am using session.saveOrUpdate() method to save but while saving it is showing the below error. Can anyone help regardng this with explanation where I made the mistake?

Here is my hbm.file

<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC  "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">  <hibernate-mapping>   <class name="com.model.cargo" table="cargo">   <id name="id" column="id" type="java.lang.Long">    <generator class="increment" />   </id>   <property name="cname" column="cname" />   <property name="cdate" column="cdate" />   <property name="csource" column="csource" />   <property name="cdestination" column="cdestination" />   <property name="create" column="createby" />   <property name="status" column="status" />    <set name="itemList" table="item" inverse="true"    cascade="all-delete-orphan">    <key>     <column name="id" />    </key>    <one-to-many class="com.model.Item" />   </set>  </class>   <class name="com.model.Item" table="item">   <id name="itemid" column="itemid" type="java.lang.Long">    <generator class="increment" />   </id>   <property name="itemName" column="itemname" />   <property name="weight" column="weight" />   <many-to-one class="com.model.cargo" name="cargo"    column="id" />  </class> </hibernate-mapping> 

My action

package com.action;  import java.util.ArrayList; import java.util.Collection; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Set;  import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession;  import org.apache.commons.beanutils.BeanUtils;  import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.actions.DispatchAction; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import com.plugin.HibernatePlugIn; import com.form.cargoForm; import com.model.cargo; import com.model.Item;   public class CargoAction extends DispatchAction {    public ActionForward add(ActionMapping mapping, ActionForm form,    HttpServletRequest request, HttpServletResponse response)    throws Exception {    if (log.isDebugEnabled()) {    log.debug("Entering Master add method");   }    try {     cargoForm cargoForm = (cargoForm) form;    //System.out.println("ID" + cargoForm.getId());    cargo cargo = new cargo();    System.out.println("in cargo Action");    // copy customerform to model    cargoForm.reset(mapping, request);    BeanUtils.copyProperties(cargo, cargoForm);    cargoForm.reset(mapping, request);   // cargoForm.setInputParam("new");    // updateFormBean(mapping, request, cargoForm);    }    catch (Exception ex) {    ex.printStackTrace();    return mapping.findForward("failure");   }    return mapping.findForward("success1");  }   public ActionForward save(ActionMapping mapping, ActionForm form,    HttpServletRequest request, HttpServletResponse response)    throws Exception {    SessionFactory sessionFactory=null;   Session session =null;   System.out.println("in cargo Action");   try{   sessionFactory = (SessionFactory) servlet     .getServletContext().getAttribute(HibernatePlugIn.KEY_NAME);     session = sessionFactory.openSession();   Transaction tx = session.beginTransaction();    cargoForm carForm = (cargoForm) form;     cargo cargo = new cargo();    System.out.println("in cargo Action");    BeanUtils.copyProperties(cargo,carForm);   System.out.println("id"+ carForm.getId());    System.out.println("item id"+ carForm.getItemid());    Set itemset = carForm.getItemDtl();      System.out.println("size"+itemset.size());      Iterator iterator =itemset.iterator();        while(iterator.hasNext()) {       Item it = (Item)iterator.next();     System.out.println("name"+it.getItemName()); //log.debug("HERE");    it.setCargo(cargo); }     cargo.setItemList(itemset);   System.out.println("size"+ itemset.size());    session.saveOrUpdate("cargo",cargo);   tx.commit();   }catch(Exception e){    e.printStackTrace();   }   return mapping.findForward("success");   }   public ActionForward search(ActionMapping mapping, ActionForm form,    HttpServletRequest request, HttpServletResponse response)    throws Exception {   System.out.println("in cargo search Action");   SessionFactory sessionFactory = (SessionFactory) servlet     .getServletContext().getAttribute(HibernatePlugIn.KEY_NAME);   HttpSession session1 = request.getSession();   Session session = sessionFactory.openSession();   Transaction tx = session.beginTransaction();   cargoForm cargoform = (cargoForm) form;   // System.out.println("Name"+cargoForm.getName());   cargo cargo = new cargo();   System.out.println("in cargo search Action");   // copy customerform to model   BeanUtils.copyProperties(cargo, cargoform);   String name;   String status;   String createby;    name = cargo.getCname();   status = cargo.getStatus();   createby = cargo.getCreate();   System.out.println("Name..." + name);   System.out.println("status..." + status);   System.out.println("createby..." + createby);   try {    if ((name.equals("")) && (createby.equals(""))      && (status.equals("")))     return mapping.findForward("failure");    String SQL_QUERY = "from cargo c where c.cname=:name or c.status=:status or c.create=:createby";    Query query = session.createQuery(SQL_QUERY);    query.setParameter("name", name);    query.setParameter("status", status);    query.setParameter("createby", createby);    ArrayList al = new ArrayList();    for (Iterator i = query.iterate(); i.hasNext();) {     cargo cargo1 = (cargo) i.next();     al.add(cargo1);     System.out.println("Cargo ID is:" + cargo1.getId());    }    System.out.println("Cargo list is:" + al.size());    session1.setAttribute("clist", al);   } catch (Exception e) {    e.printStackTrace();    return mapping.findForward("failure");   }   System.out.println("search Cargo list is success");    return mapping.findForward("success");  }      public ActionForward edit(ActionMapping mapping, ActionForm form,    HttpServletRequest request, HttpServletResponse response)    throws Exception {   SessionFactory sessionFactory=null;   Session session =null;   if (log.isDebugEnabled()) {    log.debug("Entering Master Edit method");   }    try {    sessionFactory = (SessionFactory) servlet      .getServletContext().getAttribute(HibernatePlugIn.KEY_NAME);    session = sessionFactory.openSession();    Transaction transaction=session.beginTransaction();    cargoForm carForm = (cargoForm) form;    // System.out.println(carForm.getStatus());    // System.out.println(carForm.getCreate());    cargo cargo = new cargo();    BeanUtils.copyProperties(cargo, carForm);       System.out.println("In Cargo Edit "+cargo.getId());       String qstring = "from cargo c where c.id=:id";    Query query = session.createQuery(qstring);    query.setParameter("id", cargo.getId());    ArrayList all = new ArrayList();    cargo c = (cargo) query.iterate().next();     System.out.println("Edit Cargo list " + all.size());         Set purchaseArray = new HashSet();            System.out.println("Edit"+c.getItemList().size());            carForm.setItemDtl(purchaseArray);            BeanUtils.copyProperties(carForm,c);            // transaction.commit();             session.flush();   } catch (Exception e) {    e.printStackTrace();    return mapping.findForward("failure");   }    // return a forward to edit forward   System.out.println("Edit Cargo list is success");   return mapping.findForward("succ");  }   public ActionForward delete(ActionMapping mapping, ActionForm form,    HttpServletRequest request, HttpServletResponse response)    throws Exception {    try {    SessionFactory sessionFactory = (SessionFactory) servlet      .getServletContext().getAttribute(HibernatePlugIn.KEY_NAME);    Session session = sessionFactory.openSession();    Transaction tx = session.beginTransaction();    cargoForm carForm = (cargoForm) form;    // System.out.println(carForm.getStatus());    // System.out.println(carForm.getCreate());    cargo cargo = new cargo();    BeanUtils.copyProperties(cargo, carForm);       System.out.println("In Cargo Delete "+cargo.getId());    //String qstring = "delete from cargo c where c.id=:id";    //Query query = session.createQuery(qstring);    session.delete("cargo",cargo);      // session.delete(cargo);      // session.flush();    //query.setParameter("id", cargo.getId());    //int row=query.executeUpdate();    //System.out.println("deleted row"+row);    tx.commit();    } catch (Exception e) {    e.printStackTrace();    return mapping.findForward("failure");   }   // return a forward to edit forward   System.out.println("Deleted success");   return mapping.findForward("succes");  }  } 

My parent model

package com.model;  import java.util.HashSet; import java.util.Set;  public class cargo {   private Long id;  private String cname;  private String cdate;  private String csource;  private String cdestination;  private String create;  private String status;   private Set itemList = new HashSet();   public Long getId() {   return id;  }   public void setId(Long id) {   this.id = id;  }   public String getCname() {   return cname;  }   public void setCname(String cname) {   this.cname = cname;  }   public String getCdate() {   return cdate;  }   public void setCdate(String cdate) {   this.cdate = cdate;  }   public String getCsource() {   return csource;  }   public void setCsource(String csource) {   this.csource = csource;  }   public String getCdestination() {   return cdestination;  }   public void setCdestination(String cdestination) {   this.cdestination = cdestination;  }   public String getCreate() {   return create;  }   public void setCreate(String create) {   this.create = create;  }   public String getStatus() {   return status;  }   public void setStatus(String status) {   this.status = status;  }   public Set getItemList() {   return itemList;  }   public void setItemList(Set itemList) {   this.itemList = itemList;  }   }   

My child model

package com.model;  public class Item{   private Long itemid;  private String itemName;  private String weight;  private cargo cargo;   public Long getItemid() {   return itemid;  }  public void setItemid(Long itemid) {   this.itemid = itemid;  }  public String getItemName() {   return itemName;  }  public void setItemName(String itemName) {   this.itemName = itemName;  }  public String getWeight() {   return weight;  }  public void setWeight(String weight) {   this.weight = weight;  }  public cargo getCargo() {   return cargo;  }  public void setCargo(cargo cargo) {   this.cargo = cargo;  }   }  

And my form

package com.form;  import java.util.HashSet; import java.util.Set;  import javax.servlet.http.HttpServletRequest;  import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionMapping;  import com.model.Item;  public class cargoForm extends ActionForm {  private Long id;  private String cname;  private String cdate;  private String csource;  private String cdestination;  private String create;  private String status;   private Long[] itemid;  private String[] itemName;  private String[] weight;   private Set itemset = new HashSet();   public Long getId() {   return id;  }   public void setId(Long id) {   this.id = id;  }   public String getCname() {   return cname;  }   public void setCname(String cname) {   this.cname = cname;  }   public String getCdate() {   return cdate;  }   public void setCdate(String cdate) {   this.cdate = cdate;  }   public String getCsource() {   return csource;  }   public void setCsource(String csource) {   this.csource = csource;  }   public String getCdestination() {   return cdestination;  }   public void setCdestination(String cdestination) {   this.cdestination = cdestination;  }   public String getCreate() {   return create;  }   public void setCreate(String create) {   this.create = create;  }   public String getStatus() {   return status;  }   public void setStatus(String status) {   this.status = status;  }   public Long[] getItemid() {   return itemid;  }   public void setItemid(Long[] itemid) {   this.itemid = itemid;  }   public String[] getItemName() {   return itemName;  }   public void setItemName(String[] itemName) {   this.itemName = itemName;  }   public String[] getWeight() {   return weight;  }   public void setWeight(String[] weight) {   this.weight = weight;  }   /*   * public Set getItemset() { return itemset; }   *    * public void setItemset(Set itemset) { this.itemset = itemset; }   */  public Set getItemDtl() {   if (itemid != null) {    itemset = new HashSet();    System.out.println("cargadd form" + itemid);    for (int i = 0; i < itemid.length; i++) {     Item it = new Item();     // it.setItemId(itemId[i]);     it.setItemName(itemName[i]);     System.out.println("cargadd form" + itemName[i]);     it.setWeight(weight[i]);      itemset.add(it);     System.out.println("cargadd form" + itemset.size());    }   }   return itemset;  }   public void setItemDtl(Set itemset) {   System.out.println("cargadd form" + itemset.size());   this.itemset = itemset;   System.out.println("cargadd form" + itemset.size());  }   public void reset(ActionMapping mapping, HttpServletRequest request) {    cname = "";   csource = "";   cdestination = "";   cdate = "";   status = "";   create = "";   }  } 

The error:

Hibernate: select max(itemid) from item Hibernate: insert into item (itemname, weight, position, id, itemid) values (?, ?, ?, ?, ?) Hibernate: update cargo set name=?, date=?, source=?, destination=?, createby=?, status=? where id=? Oct 4, 2010 10:44:08 AM org.hibernate.jdbc.BatchingBatcher doExecuteBatch SEVERE: Exception executing batch:  org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1  at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)  at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)  at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)  at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)  at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)  at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)  at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)  at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)  at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)  at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)  at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)  at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)  at com.action.CargoAction.save(CargoAction.java:125)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)  at java.lang.reflect.Method.invoke(Unknown Source)  at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)  at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)  at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)  at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)  at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)  at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)  at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)  at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)  at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)  at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)  at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)  at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)  at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)  at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)  at java.lang.Thread.run(Unknown Source) Oct 4, 2010 10:44:08 AM org.hibernate.event.def.AbstractFlushingEventListener performExecutions SEVERE: Could not synchronize database state with session org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1  at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)  at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)  at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)  at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)  at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)  at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)  at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)  at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)  at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)  at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)  at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)  at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)  at com.action.CargoAction.save(CargoAction.java:125)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)  at java.lang.reflect.Method.invoke(Unknown Source)  at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)  at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)  at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)  at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)  at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)  at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)  at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)  at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)  at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)  at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)  at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)  at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)  at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)  at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)  at java.lang.Thread.run(Unknown Source) org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1  at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)  at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)  at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)  at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)  at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)  at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)  at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140)  at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)  at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)  at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)  at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)  at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)  at com.action.CargoAction.save(CargoAction.java:125)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)  at java.lang.reflect.Method.invoke(Unknown Source)  at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)  at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)  at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)  at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)  at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)  at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)  at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)  at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)  at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)  at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)  at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)  at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)  at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)  at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)  at java.lang.Thread.run(Unknown Source) 

Answer 1

In the Hibernate mapping file for the id property, if you use any generator class, for that property you should not set the value explicitly by using a setter method.

If you set the value of the Id property explicitly, it will lead the error above. Check this to avoid this error.