I use Hibernate 2

I have a little problem that i can't find solution:
I have a many-to-many collection between STUDENT and EXAM, Stundent.booking is list of exam which are booked from student, and Exam.booked, list of student that are booked to this exam.

When I update the two object at run-time, the collection are updated but, when I save two object on MySQL Server 4.1, with session.saveOrUpdate( ... ), changes aren't applied.

Hibernate log shows the relationof collections are identificated like nonlazy-collection, now, how I do to resolve this conflict?


I use XDoclet to generate mapping.xml so i write the tags insert into the class STUDENT and EXAM:

public class StudentBO{

.....

private List bookings;

/**
* @hibernate.bag name="bookings" table="booking" cascade="save-update" lazy="true"
* @hibernate.collection-key column="student"
* @hibernate.collection-many-to-many class="org.equinox.model.bo.ExamBO" column="exam"
*/
public List getBookings() {
return bookings;
}

...
}



public class ExamBO{
....
private List booked;

/**
* @hibernate.bag name="booked" table="booking"
* cascade="save-update" lazy="true" inverse="true"
* @hibernate.collection-key column="exam"
* @hibernate.collection-many-to-many
* class="org.equinox.model.bo.StudentBO" column="student"
*/
public List getBooked() {
return booked;
}

.....
}




[equinox] DEBUG [http-8080-Processor23] SessionImpl.<init>(542) | opened session
[equinox] DEBUG [http-8080-Processor23] ModuleUtils.getModuleName(169) | Get module name for path /bookExam.do
[equinox] DEBUG [http-8080-Processor23] ModuleUtils.getModuleName(193) | Module name found: default
[equinox] DEBUG [http-8080-Processor23] RequestProcessor.processActionCreate(257) | Looking for Action instance for class org.equinox.web.action.BookedExamAction
[equinox] DEBUG [http-8080-Processor23] RequestProcessor.processActionCreate(278) | Creating new Action instance
[equinox] DEBUG [http-8080-Processor23] JDBCTransaction.begin(37) | begin
[equinox] DEBUG [http-8080-Processor23] JDBCTransaction.begin(41) | current autocommit status:true
[equinox] DEBUG [http-8080-Processor23] JDBCTransaction.begin(43) | disabling autocommit
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoadByClass(1975) | loading [org.equinox.model.bo.ExamBO#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoad(2072) | attempting to resolve [org.equinox.model.bo.ExamBO#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoad(2105) | object not resolved in any cache [org.equinox.model.bo.ExamBO#3]
[equinox] DEBUG [http-8080-Processor23] EntityPersister.load(416) | Materializing entity: [org.equinox.model.bo.ExamBO#3]
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.logOpenPreparedStatement(196) | about to open: 0 open PreparedStatements, 0 open ResultSets
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.getPreparedStatement(237) | select exambo0_.oid as oid0_, exambo0_.course as course0_, exambo0_.examdate as examdate0_, exambo0_.examloc as examloc0_, exambo0_.sexamdate as sexamdate0_, exambo0_.sexamloc as sexamloc0_, exambo0_.notes as notes0_ from exam exambo0_ where exambo0_.oid=?
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.getPreparedStatement(241) | preparing statement
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeSet(46) | binding '3' to parameter: 1
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(197) | processing result set
[equinox] DEBUG [http-8080-Processor23] Loader.getRow(405) | result row: 3
[equinox] DEBUG [http-8080-Processor23] Loader.loadFromResultSet(536) | Initializing object from ResultSet: 3
[equinox] DEBUG [http-8080-Processor23] Loader.hydrate(605) | Hydrating entity: org.equinox.model.bo.ExamBO#3
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning '2' as column: course0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning '23 July 2004' as column: examdate0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'Aula T8' as column: examloc0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning '30 July 2004' as column: sexamdate0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'Aula 19' as column: sexamloc0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'Venire Gi? Studiati' as column: notes0_
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(226) | done processing result set (1 rows)
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.logClosePreparedStatement(203) | done closing: 0 open PreparedStatements, 0 open ResultSets
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.closePreparedStatement(261) | closing statement
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(239) | total objects hydrated: 1
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeEntity(2191) | resolving associations for [org.equinox.model.bo.ExamBO#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoadByClass(1975) | loading [org.equinox.model.bo.CourseBO#2]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.getCollection(3924) | creating collection wrapper:[org.equinox.model.bo.ExamBO.booked#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeEntity(2215) | done materializing entity [org.equinox.model.bo.ExamBO#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeNonLazyCollections(3107) | initializing non-lazy collections
[equinox] DEBUG [http-8080-Processor23] ServiceManagerImpl.bookExam(522) | ------------------- Aggiungo Esame&Studente alleliste concatenate---------------------
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoadByClass(1975) | loading [org.equinox.model.bo.StudentBO#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoad(2072) | attempting to resolve [org.equinox.model.bo.StudentBO#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoad(2105) | object not resolved in any cache [org.equinox.model.bo.StudentBO#3]
[equinox] DEBUG [http-8080-Processor23] EntityPersister.load(416) | Materializing entity: [org.equinox.model.bo.StudentBO#3]
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.logOpenPreparedStatement(196) | about to open: 0 open PreparedStatements, 0 open ResultSets
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.getPreparedStatement(237) | select studentbo0_.oid as oid0_, studentbo0_.id as id0_, studentbo0_.email as email0_, studentbo0_.tutor as tutor0_, studentbo0_.stage as stage0_, studentbo0_.usernameas username0_, studentbo0_.pwd as pwd0_, studentbo0_.name as name0_, studentbo0_.surname as surname0_, studentbo0_.role as role0_, studentbo0_.active as active0_ from user studentbo0_ where studentbo0_.oid=?
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.getPreparedStatement(241) | preparing statement
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeSet(46) | binding '3' to parameter: 1
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(197) | processing result set
[equinox] DEBUG [http-8080-Processor23] Loader.getRow(405) | result row: 3
[equinox] DEBUG [http-8080-Processor23] Loader.loadFromResultSet(536) | Initializing object from ResultSet: 3
[equinox] DEBUG [http-8080-Processor23] Loader.hydrate(605) | Hydrating entity: org.equinox.model.bo.StudentBO#3
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning '3' as column: id0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'rossi@informatica.uniroma2.it' as column:email0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning '1' as column: tutor0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning '1' as column: stage0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'rossi' as column: username0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'e0591aab15eb15951af97dd227f5302d' as column: pwd0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'luca' as column: name0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'rossi' as column: surname0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'studente' as column: role0_
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeGet(68) | returning 'true' as column: active0_
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(226) | done processing result set (1 rows)
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.logClosePreparedStatement(203) | done closing: 0 open PreparedStatements, 0 open ResultSets
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.closePreparedStatement(261) | closing statement
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(239) | total objects hydrated: 1
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeEntity(2191) | resolving associations for [org.equinox.model.bo.StudentBO#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoadByClass(1975) | loading [org.equinox.model.bo.TeacherBO#1]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.doLoadByClass(1975) | loading [org.equinox.model.bo.StageBO#1]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.getCollection(3924) | creating collection wrapper:[org.equinox.model.bo.StudentBO.bookings#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.getCollection(3924) | creating collection wrapper:[org.equinox.model.bo.UserBO.moderated#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.getCollection(3924) | creating collection wrapper:[org.equinox.model.bo.UserBO.enabledServices#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeEntity(2215) | done materializing entity [org.equinox.model.bo.StudentBO#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeNonLazyCollections(3107) | initializing non-lazy collections
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeCollection(3251) | initializing collection [org.equinox.model.bo.ExamBO.booked#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeCollection(3252) | checking second-level cache
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeCollection(3258) | collection not cached
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.logOpenPreparedStatement(196) | about to open: 0 open PreparedStatements, 0 open ResultSets
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.getPreparedStatement(237) | select booked0_.student as student__, booked0_.exam as exam__ from booking booked0_ where booked0_.exam=?
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.getPreparedStatement(241) | preparing statement
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeSet(46) | binding '3' to parameter: 1
[equinox] DEBUG [http-8080-Processor23] Loader.handleEmptyCollections(327) | result set contains (possibly empty) collection: [org.equinox.model.bo.ExamBO.booked#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.getLoadingCollection(3009) | uninitialized collection: initializing
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(197) | processing result set
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(226) | done processing result set (0 rows)
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.logClosePreparedStatement(203) | done closing: 0 open PreparedStatements, 0 open ResultSets
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.closePreparedStatement(261) | closing statement
[equinox] DEBUG [http-8080-Processor23] SessionImpl.endLoadingCollections(3068) | 1 collections were found in result set
[equinox] DEBUG [http-8080-Processor23] SessionImpl.endLoadingCollections(3086) | collection fully initialized: [org.equinox.model.bo.ExamBO.booked#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.endLoadingCollections(3089) | 1 collections initialized
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeNonLazyCollections(3107) | initializing non-lazy collections
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeCollection(3260) | collection initialized
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeCollection(3251) | initializing collection [org.equinox.model.bo.StudentBO.bookings#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeCollection(3252) | checking second-level cache
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeCollection(3258) | collection not cached
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.logOpenPreparedStatement(196) | about to open: 0 open PreparedStatements, 0 open ResultSets
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.getPreparedStatement(237) | select bookings0_.exam as exam__, bookings0_.student as student__ from booking bookings0_ where bookings0_.student=?
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.getPreparedStatement(241) | preparing statement
[equinox] DEBUG [http-8080-Processor23] NullableType.nullSafeSet(46) | binding '3' to parameter: 1
[equinox] DEBUG [http-8080-Processor23] Loader.handleEmptyCollections(327) | result set contains (possibly empty) collection: [org.equinox.model.bo.StudentBO.bookings#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.getLoadingCollection(3009) | uninitialized collection: initializing
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(197) | processing result set
[equinox] DEBUG [http-8080-Processor23] Loader.doQuery(226) | done processing result set (0 rows)
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.logClosePreparedStatement(203) | done closing: 0 open PreparedStatements, 0 open ResultSets
[equinox] DEBUG [http-8080-Processor23] BatcherImpl.closePreparedStatement(261) | closing statement
[equinox] DEBUG [http-8080-Processor23] SessionImpl.endLoadingCollections(3068) | 1 collections were found in result set
[equinox] DEBUG [http-8080-Processor23] SessionImpl.endLoadingCollections(3086) | collection fully initialized: [org.equinox.model.bo.StudentBO.bookings#3]
[equinox] DEBUG [http-8080-Processor23] SessionImpl.endLoadingCollections(3089) | 1 collections initialized
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeNonLazyCollections(3107) | initializing non-lazy collections
[equinox] DEBUG [http-8080-Processor23] SessionImpl.initializeCollection(3260) | collection initialized
[equinox] DEBUG [http-8080-Processor23] ServiceManagerImpl.bookExam(526) | --------------------- Salvo ExamBO e StudentBO --------------------
[equinox] DEBUG [http-8080-Processor23] SessionImpl.saveOrUpdate(1364) | saveOrUpdate() persistent instance
[equinox] DEBUG [http-8080-Processor23] JDBCTransaction.commit(59) | commit
[equinox] DEBUG [http-8080-Processor23] SessionImpl.afterTransactionCompletion(572) | transaction completion
[equinox] DEBUG [http-8080-Processor23] JDBCTransaction.toggleAutoCommit(103) | re-enabling autocommit
[equinox] DEBUG [http-8080-Processor23] TilesRequestProcessor.processForwardConfig(291) | processForwardConfig(.result, false)
[equinox] DEBUG [http-8080-Processor23] TilesRequestProcessor.processTilesDefinition(231) | uri=/layouts/equinoxLayout.jsp doInclude=false
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/common/equinoxHeader.jsp'.
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/common/equinoxMenu.jsp'.
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/WEB-INF/pages/result.jsp'.
[equinox] DEBUG [http-8080-Processor23] PropertyMessageResources.getMessage(134) | getMessage(it,booking.exam)
[equinox] DEBUG [http-8080-Processor23] PropertyMessageResources.loadLocale(226) | loadLocale(it)
[equinox] DEBUG [http-8080-Processor23] PropertyMessageResources.loadLocale(226) | loadLocale(en_US)
[equinox] DEBUG [http-8080-Processor23] PropertyMessageResources.loadLocale(226) | loadLocale()
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/common/userCounter.jsp'.
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/common/equinoxRightMenu.jsp'.
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/WEB-INF/pages/equinoxNews.jsp'.
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/common/equinoxLogin.jsp'.
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/common/equinoxReservedMenu.jsp'.
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/common/equinoxOther.jsp'.
[equinox] DEBUG [http-8080-Processor23] InsertTag$InsertHandler.doEndTag(861) | insert page='/common/equinoxFooter.jsp'.
[equinox] DEBUG [http-8080-Processor23] TilesRequestProcessor.processForwardConfig(305) | '.result' - processed as definition
[equinox] DEBUG [http-8080-Processor23] SessionImpl.close(560) | closing session


Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

Since you the exam side is mapped inverse="true" you only have to call saveOrUpdate on the student side.

According to Hibernate in Action page 228 you should use a set at the inverse side of the association.

Thanks for you reply.

to your indications I have modified the source codes, but the problem still persists and it has not been resolved.

If I create a persistence object mapped on table to mantain the relationship between two object? It's possible (like last hope)?

Sorry, but I changed bidirectional collection tags, from bag to set, but when Hibernate called the method this is the log exception:

[equinox] ERROR [http-8080-Processor23] ActionExceptionHandler.logException(130) | org.springframework.orm.hibernate.HibernateSystemException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for moreinfo) setter of org.equinox.model.bo.ExamBO.setBooked; nested exception is net.sf.hibernate.PropertyAccessException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of org.equinox.model.bo.ExamBO.setBooked
net.sf.hibernate.PropertyAccessException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of org.equinox.model.bo.ExamBO.setBooked
at net.sf.hibernate.persister.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:212)
at net.sf.hibernate.impl.SessionImpl.initializeEntity(SessionImpl.java:2199)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:240)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.doList(Loader.java:955)
at net.sf.hibernate.loader.Loader.list(Loader.java:946)
at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:834)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1536)
at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
at org.springframework.orm.hibernate.HibernateTemplate$33.doInHibernate(HibernateTemplate.java:560)
at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:176)
at org.springframework.orm.hibernate.HibernateTemplate.executeFind(HibernateTemplate.java:196)
at org.springframework.orm.hibernate.HibernateTemplate.findByNamedQuery(HibernateTemplate.java:556)
at org.equinox.persistence.hibernate.ExamDAOHibernate.getExamsTrienn(ExamDAOHibernate.java:95)
at org.equinox.service.impl.ServiceManagerImpl.getExamsTrienn(ServiceManagerImpl.java:499)
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:324)
at org.springframework.aop.framework.AopProxyUtils.invokeJoinpointUsingReflection(AopProxyUtils.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:149)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:116)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:56)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:138)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:152)
at $Proxy1.getExamsTrienn(Unknown Source)
at org.equinox.web.action.ListBookExamAction.execute(ListBookExamAction.java:40)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
at com.livinglogic.struts.workflow.TilesWorkflowRequestProcessor.processActionPerform(TilesWorkflowRequestProcessor.java:158)
at com.livinglogic.struts.workflow.WorkflowRequestProcessorLogic.process(WorkflowRequestProcessorLogic.java:568)
at com.livinglogic.struts.workflow.TilesWorkflowRequestProcessor.process(TilesWorkflowRequestProcessor.java:179)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:86)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:73)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:73)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at com.opensymphony.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:42)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at net.sf.acegisecurity.intercept.web.FilterSecurityInterceptor.proceedWithObject(FilterSecurityInterceptor.java:87)
at net.sf.acegisecurity.intercept.AbstractSecurityInterceptor.interceptor(AbstractSecurityInterceptor.java:368)
at net.sf.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:78)
at net.sf.acegisecurity.intercept.web.SecurityEnforcementFilter.doFilter(SecurityEnforcementFilter.java:165)
at net.sf.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:105)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at net.sf.acegisecurity.ui.AbstractIntegrationFilter.doFilter(AbstractIntegrationFilter.java:170)
at net.sf.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:105)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at net.sf.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:368)
at net.sf.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:105)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:170)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:73)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
Caused by: net.sf.cglib.beans.BulkBeanException
at org.equinox.model.bo.ExamBO$$BulkBeanByCGLIB$$72e13080.setPropertyValues(<generated>)
at net.sf.hibernate.persister.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:207)
... 87 more
Caused by: java.lang.ClassCastException
... 89 more

Thanks to help.

Kallsu if you have still not gotten any solution i will likwe you to e-mail me with the problem again this time go through it step by step so i help you out. so let me know at pkkamos@yahoo.com NOTE: please don't add your log let me just know what you want to achieve.