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Author Message
Juha-Matti Valjus
 Post subject: Session.save generates one insert and four updates
PostPosted: Tue Jan 30, 2007 8:43 am 
Newbie

Joined: Tue Nov 28, 2006 3:24 am
Posts: 11
Need help with Hibernate? Read this first:
http://www.hibernate.org/ForumMailingli ... AskForHelp

Hibernate version:
3.2.0 GA
Mapping documents:
A.hbm.xml

Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
       
<hibernate-mapping>
   
   <class name="persistencebeans.A" table="A">
      
      <id name="id" column="id" type="java.lang.Integer">
         <generator class="sequence">
           <param name="sequence">A_id_seq</param>
          </generator>
      </id>
      
      <property name="timestamp"
              column="timestamp"
              not-null="true"/>
            
           
        <set name="Bs" table="B" inverse="true" cascade="all">
              <key column="A_id" />
               <one-to-many class="persistencebeans.B" />
        </set>                                               
                   
   </class>
   
</hibernate-mapping>


B.hbm.xml
Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
       
<hibernate-mapping>
   
   <class name="persistencebeans.B" table="B">
      
      <id name="id" column="id" type="java.lang.Integer">
         <generator class="sequence">
           <param name="sequence">B_id_seq</param>
          </generator>
      </id>
            
      <many-to-one name="A" class="persistencebeans.A"
         column="A_id" not-null="true" cascade="all">
      </many-to-one>
      <many-to-one name="C" class="persistencebeans.C"
         column="C_id" not-null="true" cascade="all" />      

   </class>
   
</hibernate-mapping>


C.hbm.xml
Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
       
<hibernate-mapping>
   
   <class name="persistencebeans.C" table="C">
      
      <id name="id" column="id" type="java.lang.Integer">
         <generator class="sequence">
           <param name="sequence">C_id_seq</param>
          </generator>
      </id>
            
        <many-to-one name="D"
           class="persistencebeans.D" column="D_id"
           lazy="false" />

        <set name="Bs" table="B" inverse="true" cascade="all">
              <key column="C_id" />
               <one-to-many class="persistencebeans.B" />
        </set>
                   
   </class>
   
</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():
Code:

List<C> Cs = database.getCs(session);
A a = new A();
a.setBs(new HashSet<B>());

doA(a,Cs);

Transaction tx = null;
           
            try {
                tx = session.beginTransaction();
                session.save(a);
                tx.commit();
            }
            catch (HibernateException e) {
                tx.rollback();
               
                log.error("Saving A failed because: "
                        + e.getCause().getMessage(), e);
                throw e;
            }


Full stack trace of any exception that occurs:
Code:
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.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:92)
   at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:87)
   at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:218)
   at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2289)
   at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2242)
   at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2542)
   at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:92)
   at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232)
   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 userface.AAction.doA(AAction.java:203)
   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:585)
   at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:266)
   at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:167)
   at org.apache.struts.actions.LookupDispatchAction.execute(LookupDispatchAction.java:143)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:413)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:225)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:459)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at security.AuthorisationFilter.doFilter(AuthorisationFilter.java:66)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at security.AuthenticationFilter.doFilter(AuthenticationFilter.java:72)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)
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.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:92)
   at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:87)
   at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:218)
   at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2289)
   at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2242)
   at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2542)
   at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:92)
   at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232)
   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 userface.AAction.doA(AAction.java:203)
   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:585)
   at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:266)
   at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:167)
   at org.apache.struts.actions.LookupDispatchAction.execute(LookupDispatchAction.java:143)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:413)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:225)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:459)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at security.AuthorisationFilter.doFilter(AuthorisationFilter.java:66)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at security.AuthenticationFilter.doFilter(AuthenticationFilter.java:72)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)
findException: look locally for java.lang.NullPointerException
findException: look locally for java.lang.NullPointerException
findException: look globally for java.lang.NullPointerException
findException: look globally for java.lang.NullPointerException
findException: look locally for java.lang.RuntimeException
findException: look locally for java.lang.RuntimeException
findException: look globally for java.lang.RuntimeException
findException: look globally for java.lang.RuntimeException
findException: look locally for java.lang.Exception
findException: look locally for java.lang.Exception
findException: look globally for java.lang.Exception
findException: look globally for java.lang.Exception
findException: look locally for java.lang.Throwable
findException: look locally for java.lang.Throwable
findException: look globally for java.lang.Throwable
findException: look globally for java.lang.Throwable
findException: look locally for java.lang.Object
findException: look locally for java.lang.Object
findException: look globally for java.lang.Object
findException: look globally for java.lang.Object
Unhandled Exception thrown: class java.lang.NullPointerException
Unhandled Exception thrown: class java.lang.NullPointerException
Servlet.service() for servlet action threw exception
java.lang.NullPointerException
   at userface.AAction.A(AAction.java:209)
   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:585)
   at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:266)
   at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:167)
   at org.apache.struts.actions.LookupDispatchAction.execute(LookupDispatchAction.java:143)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:413)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:225)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:459)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at security.AuthorisationFilter.doFilter(AuthorisationFilter.java:66)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at security.AuthenticationFilter.doFilter(AuthenticationFilter.java:72)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)




Name and version of the database you are using:
PostgreSQL 8.0.8

The generated SQL (show_sql=true):
Code:
Hibernate: insert into A (timestamp, id) values (?, ?)
Hibernate: insert into B (A_id, C_id, id) values (?, ?, ?)
Hibernate: update B set A_id=?, C_id=? where id=?
Hibernate: update B set A_id=?, C_id=? where id=?
Hibernate: update B set A_id=?, C_id=? where id=?
Hibernate: update B set A_id=?, C_id=? where id=?

doA:
B b = new B();
b.setC(some C);
b.setA(a);
a.getBs.put(b);
some C.getBs.put(b);

why hibernate is trying to update non existing instance of B 4 times, instead of inserting 5 Bs to database?

Thanks


Last edited by Juha-Matti Valjus on Wed Jan 31, 2007 3:41 am, edited 1 time in total.

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 Profile  
 
evdelst
 Post subject: Did you implement equals() and hashCode() for all classes?
PostPosted: Tue Jan 30, 2007 11:02 am 
Regular
Regular

Joined: Wed Aug 24, 2005 11:49 am
Posts: 63
Did you implement equals() and hashCode() for all classes?

_________________
Edwin van der Elst
Finalist IT Group

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Juha-Matti Valjus
 Post subject:
PostPosted: Tue Jan 30, 2007 11:12 am 
Newbie

Joined: Tue Nov 28, 2006 3:24 am
Posts: 11
Hi,

thanks for your reply.

No I didn't implement equals() or hashCode() methods for my classes, is this necessary?, because they are different if used Object.equals()-method.
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 Profile  
 
Juha-Matti Valjus
 Post subject:
PostPosted: Wed Jan 31, 2007 3:37 am 
Newbie

Joined: Tue Nov 28, 2006 3:24 am
Posts: 11
Hi again,

what does:
Code:
org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session:

exactly mean?

I tried to save Bs one by one to avoid previous error, but this came up.

following SQL and error message is generated:
Code:
Hibernate: select nextval ('A_id_seq')
Hibernate: insert into A(timestamp, id) values (?, ?)
Hibernate: select nextval ('B_id_seq')

org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [persistencebeans.B#29]
at org.hibernate.engine.StatefulPersistenceContext.checkUniqueness(StatefulPersistenceContext.java:556)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:259)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:217)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
   at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:507)
   at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:499)
   at org.hibernate.engine.CascadingAction$1.cascade(CascadingAction.java:218)
   at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)
   at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)
   at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
   at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296)
   at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242)
   at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219)
   at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
   at org.hibernate.engine.Cascade.cascade(Cascade.java:130)
   at org.hibernate.event.def.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:131)
   at org.hibernate.event.def.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:122)
   at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:65)
   at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
   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 persistencebeans.B.save(B.java:114)
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Juha-Matti Valjus
 Post subject:
PostPosted: Wed Jan 31, 2007 7:50 am 
Newbie

Joined: Tue Nov 28, 2006 3:24 am
Posts: 11
Hi,

problem solved. I found this http://www.hibernate.org/109.html and implemented equals and hashcode-methods to B.java
and chanced code in doA to:

Code:
B b = new B();
b.setC(some C);
b.setA(a);
// new part
session.save(b);
session.flush();

a.getBs.put(b);
some C.getBs.put(b);


now it works like a charm.
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