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Psamathos
 Post subject: SerializationException after upgrade to 3.1/ann 3.1b7
PostPosted: Wed Dec 14, 2005 12:13 pm 
Newbie

Joined: Sat Oct 08, 2005 9:59 am
Posts: 3
Hi,

I could use some help with this mapping, It used to work just fine before I upgraded. I can't figure out why it can't read the column since if I run it by myself in psql it works just fine ( formula0_3_= 1).

I'd appreciate any help since I'll soon be bald from pulling my hair out.

regards
/Magnus Sjöstrand

The objects in question are:
Code:
@Entity ( access = AccessType.FIELD )
@SequenceGenerator (
      name = "SEQ_STORE",
      sequenceName="label_id_seq"
)
public class Label implements Serializable, BaseBO {
   @Id ( generate = GeneratorType.SEQUENCE, generator="SEQ_STORE" )
   private int               id;
   private String            name;
   @OneToMany ( mappedBy="label" )
   @MapKey ( name="language")
   private Map<Language,LabelValue>   values;
}

@Entity ( access = AccessType.FIELD )
public class LabelValue implements Serializable, BaseBO {
   @Id
   private int               id;
   @ManyToOne
   @JoinColumn ( name="labelid" )
   Label                  label;
   @ManyToOne
   @JoinColumn ( name="languageId" )
   private Language         language;
   private String            value;
}

public class Language implements BaseBO, Labelable, Serializable {
   @Id ( generate = GeneratorType.SEQUENCE, generator="SEQ_STORE" )
   private int         id;
   @ManyToOne
   @JoinColumn ( name="labelId" )
   private Label      label;
   @Column ( unique = true )
   private String      iso;
}


Hibernate version: 3.1, annotations 3.1b7

Full stack trace of any exception that occurs:
org.hibernate.type.SerializationException: could not deserialize
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:211)
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:234)
at org.hibernate.type.SerializableType.fromBytes(SerializableType.java:78)
at org.hibernate.type.SerializableType.get(SerializableType.java:39)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:113)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:102)
at org.hibernate.persister.collection.AbstractCollectionPersister.readIndex(AbstractCollectionPersister.java:650)
at org.hibernate.collection.PersistentMap.readFrom(PersistentMap.java:222)
at org.hibernate.loader.Loader.readCollectionElement(Loader.java:994)
at org.hibernate.loader.Loader.readCollectionElements(Loader.java:635)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:580)
at org.hibernate.loader.Loader.doQuery(Loader.java:689)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.loadCollection(Loader.java:1919)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:71)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:520)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1627)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:344)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
at org.hibernate.collection.AbstractPersistentCollection.readElementByIndex(AbstractPersistentCollection.java:161)
at org.hibernate.collection.PersistentMap.get(PersistentMap.java:127)
at com.snusk.data.Label.getValue(Label.java:48)
at com.snusk.BaseAction.sortByLabel(BaseAction.java:116)
at com.snusk.PersonalSettingsAction.view(PersonalSettingsAction.java:65)
at com.snusk.PersonalSettingsAction.unspecified(PersonalSettingsAction.java:206)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:256)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:194)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
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:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.ajaxanywhere.AAFilter.doFilter(AAFilter.java:41)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.snusk.EncodingFilter.doFilter(EncodingFilter.java:20)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.snusk.HibernateFilter.doFilter(HibernateFilter.java:47)
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.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:744)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:674)
at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:866)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2232)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2698)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:750)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:268)
at org.hibernate.util.SerializationHelper$CustomObjectInputStream.<init>(SerializationHelper.java:246)
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:203)
... 57 more

Name and version of the database you are using:
Postgresql 8.1

The generated SQL (show_sql=true):
select values0_.labelid as labelid3_, values0_.id as id3_, values0_.languageId as formula0_3_, values0_.id as id9_2_, values0_.labelid as labelid9_2_, values0_.languageId as languageId9_2_, values0_.value as value9_2_, language1_.id as id10_0_, language1_.labelId as labelId10_0_, language1_.iso as iso10_0_, label2_.id as id8_1_, label2_.name as name8_1_ from LabelValue values0_ left outer join Language language1_ on values0_.languageId=language1_.id left outer join Label label2_ on language1_.labelId=label2_.id where values0_.labelid=?

Debug level Hibernate log excerpt:
17:05:06,043 DEBUG StatefulPersistenceContext:820 - initializing non-lazy collections
17:05:06,044 DEBUG DefaultInitializeCollectionEventListener:41 - initializing collection [com.snusk.data.Label.values#35]
17:05:06,045 DEBUG DefaultInitializeCollectionEventListener:47 - checking second-level cache
17:05:06,045 DEBUG DefaultInitializeCollectionEventListener:59 - collection not cached
17:05:06,045 DEBUG Loader:1911 - loading collection: [com.snusk.data.Label.values#35]
17:05:06,046 DEBUG AbstractBatcher:311 - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
17:05:06,046 DEBUG SQL:346 - select values0_.labelid as labelid3_, values0_.id as id3_, values0_.languageId as formula0_3_, values0_.id as id9_2_, values0_.labelid as labelid9_2_, values0_.languageId as languageId9_2_, values0_.value as value9_2_, language1_.id as id10_0_, language1_.labelId as labelId10_0_, language1_.iso as iso10_0_, label2_.id as id8_1_, label2_.name as name8_1_ from LabelValue values0_ left outer join Language language1_ on values0_.languageId=language1_.id left outer join Label label2_ on language1_.labelId=label2_.id where values0_.labelid=?
17:05:06,047 DEBUG AbstractBatcher:424 - preparing statement
17:05:06,052 DEBUG AbstractBatcher:327 - about to open ResultSet (open ResultSets: 0, globally: 0)
17:05:06,053 DEBUG Loader:1040 - result set contains (possibly empty) collection: [com.snusk.data.Label.values#35]
17:05:06,056 DEBUG CollectionLoadContext:84 - uninitialized collection: initializing
17:05:06,057 DEBUG Loader:682 - processing result set
17:05:06,057 DEBUG Loader:687 - result set row: 0
17:05:06,058 DEBUG Loader:1164 - result row: EntityKey[com.snusk.data.Language#1], EntityKey[com.snusk.data.Label#1], EntityKey[com.snusk.data.LabelValue#35]
17:05:06,059 DEBUG Loader:1347 - Initializing object from ResultSet: [com.snusk.data.Language#1]
17:05:06,059 DEBUG AbstractEntityPersister:1860 - Hydrating entity: [com.snusk.data.Language#1]
17:05:06,060 DEBUG Loader:1347 - Initializing object from ResultSet: [com.snusk.data.Label#1]
17:05:06,077 DEBUG AbstractEntityPersister:1860 - Hydrating entity: [com.snusk.data.Label#1]
17:05:06,077 DEBUG Loader:1347 - Initializing object from ResultSet: [com.snusk.data.LabelValue#35]
17:05:06,078 DEBUG AbstractEntityPersister:1860 - Hydrating entity: [com.snusk.data.LabelValue#35]
17:05:06,079 DEBUG Loader:972 - found row of collection: [com.snusk.data.Label.values#35]
17:05:06,079 DEBUG CollectionLoadContext:112 - reading row
17:05:06,079 DEBUG DefaultLoadEventListener:153 - loading entity: [com.snusk.data.LabelValue#35]
17:05:06,080 DEBUG DefaultLoadEventListener:304 - attempting to resolve: [com.snusk.data.LabelValue#35]
17:05:06,081 DEBUG DefaultLoadEventListener:313 - resolved object in session cache: [com.snusk.data.LabelValue#35]
17:05:06,081 DEBUG SerializationHelper:198 - Starting deserialization of object
17:05:06,087 INFO SerializableType:132 - could not read column value from result set: formula0_3_
17:05:06,088 DEBUG AbstractBatcher:334 - about to close ResultSet (open ResultSets: 1, globally: 1)
17:05:06,089 DEBUG AbstractBatcher:319 - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
17:05:06,089 DEBUG AbstractBatcher:470 - closing statement
17:05:06,090 WARN RequestProcessor:516 - Unhandled Exception thrown: class org.hibernate.type.SerializationException[/code]
Code:
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Doegi
 Post subject:
PostPosted: Thu Feb 09, 2006 3:22 pm 
Newbie

Joined: Tue Oct 11, 2005 1:59 pm
Posts: 4
Any news on this?

I've just installed JBoss 4.0.4RC1 with the latest EJB3 included, and I get the same error in every situation where a Map is used with an Entity as key.

I have almost identical code to yours above (I also have a Label with a Map<Language,Translation> translations; field here, and Language is an entity as well), but I also have other beans with ManyToOne relationsships that use @Mapkey

The problem is the @Mapkey property if the key itself is an entity.

If you change the Map to a List it works. If you use a ManyToOne relationsship (i.e. Language is a single field proprety of Label in the above case), it works.

It seems the "formula" code is broken. And the same as in the original poster: If I take the used SQL query from the DEBUG log and call it in SQLYog, I get valid results.

This just worked with the EJB3 version included in JBoss 4.0.3SP1.

(MySQL 4.1.11 on Windows XP here)
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Doegi
 Post subject:
PostPosted: Thu Feb 09, 2006 5:39 pm 
Newbie

Joined: Tue Oct 11, 2005 1:59 pm
Posts: 4
ok, I downloaded the latest HEAD from CVS and added some debug output.

Code:
22:29:40,293 INFO  [STDOUT] Hibernate: select label0_.id as id3_, label0_.identifier as identifier3_ from label label0_ order by label0_.identifier
22:29:40,573 INFO  [STDOUT] Loading collection:[de.rheuma_online.rheumatool.common.Label.translations#18]
22:29:40,573 INFO  [STDOUT] Hibernate: select translatio0_.label as label1_, translatio0_.id as id1_, translatio0_.language as formula0_1_, translatio0_.id as id5_0_, transatio0_.label as label5_0_, translatio0_.language as language5_0_, translatio0_.text as text5_0_ from translation translatio0_ where  translatio0_.label=?
22:29:40,583 INFO  [STDOUT] Index Type: org.hibernate.type.SerializableType@1bc3013
22:29:40,583 INFO  [STDOUT] Element Type: org.hibernate.type.ManyToOneType(de.rheuma_online.rheumatool.common.Translation)
22:29:40,593 INFO  [SerializableType] could not read column value from result set: formula0_1_



The "Element/Index Type" stdout are in printed in AbstractCollectionPersister.readIndex();

The error seems to be that Hibernate thinks the column "language" (which is fetched as "formula0_1") holds a _SERIALIZED_ version of the Language class (hence the SerializeableType warning). This is of course wrong, it only holds the primary key.

I'm struck now. I can't figure out where sets the types of the map's index, hence I cannot debug it.

I'm now going to use a workaround in my entity beans (don't use the entity as the map but use the long value), but I'd like to have this bug fixed.
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Doegi
 Post subject:
PostPosted: Thu Feb 09, 2006 5:56 pm 
Newbie

Joined: Tue Oct 11, 2005 1:59 pm
Posts: 4
Interestingly enough, persisting to the database works (e.g. when the tables were empty before). But once you saved one "Label" entity to the database, the above error occurs.
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hagios17
 Post subject: same problem
PostPosted: Fri Apr 07, 2006 3:39 pm 
Newbie

Joined: Sat Mar 11, 2006 4:15 pm
Posts: 15
I just updated and now I'm getting the same problem too. I traced all the way into the hibernate source to where it reads the values. I have an association:

@ManyToOne(optional=false, fetch=FetchType.LAZY)
@PrimaryKeyJoinColumn
public Response getResponse() {
return response;
}

and for some reason it seems to think that the integer primary key is a serialized object (SerializableType). Interestingly enough, right above this I have:

@ManyToOne(optional=false, fetch=FetchType.LAZY)
@PrimaryKeyJoinColumn
public Question getQuestion() {
return question;
}

But when hibernate reads that one it reads it as an IntegerType which is correct. Whats the deal?
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emmanuel
 Post subject: Re: same problem
PostPosted: Sun Apr 16, 2006 12:31 pm 
Hibernate Team
Hibernate Team

Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
hagios17 wrote:
@ManyToOne(optional=false, fetch=FetchType.LAZY)
@PrimaryKeyJoinColumn


does not make any sense

_________________
Emmanuel

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silvaran
 Post subject:
PostPosted: Fri Jul 21, 2006 1:37 pm 
Regular
Regular

Joined: Wed Feb 15, 2006 9:09 pm
Posts: 76
3.2.0-CR1(changelog.txt): [ANN-281] - @Mapkey broken if key is Entity

Works great, thanks guys!
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marcioferlan
 Post subject: Re: SerializationException after upgrade to 3.1/ann 3.1b7
PostPosted: Wed Sep 09, 2009 9:28 am 
Newbie

Joined: Wed Sep 09, 2009 9:15 am
Posts: 1
Hey everybody.

I had the very same problem and fixed it.
In my case, I forgot to map a ManyToOne relation.

See an example:
Code:
@Entity
class Employee {

@Id
private Integer id;

@Column(name="company_id")
private Company company;

}

As you could see, I set a column name for the company composition (which is wrong) and I didn't map it as a ManyToOne relation.

So, I just replaced the @Column annotation for:
Code:
@ManyToOne
@JoinColumn(name="company_id")
private Company company;

And everything worked perfectly. Maybe it is the same situation of some of you.

I hope I could help.

Regards,

Marcio Fernandes de Lima
# Sun Certified Java Programmer - SCJP
# Sun Certified Web Component Developer - SCWCD
# MySQL Core Certified

Linked In: http://www.linkedin.com/in/marcioferlan
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baoo_naveed
 Post subject: Re: SerializationException after upgrade to 3.1/ann 3.1b7
PostPosted: Mon May 24, 2010 2:53 pm 
Newbie

Joined: Mon May 24, 2010 2:47 pm
Posts: 1
marcioferlan thanks for your reply.

I had the same problem and the reason was that in my hbm.xml file, I forgot to mention many-to-one relationship. Once that was in place everything worked fine.
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