Solved

net.sf.hibernate.type.SerializationException: could not deserialize

Posted on 2004-09-14
20
2,238 Views
Last Modified: 2012-05-05
hi experts,

when I try to select a row from database using hibernate I get the net.sf.hibernate.type.SerializationException: could not deserialize exception. When I try to fetch a row it returns a null value normally but it cannot "deserialize" exiting data into a class. All my classes implement Serializable.

the part where I do the operation is here:

    try {
      session = openSession();
      Query q = session.createQuery("fromXxxDTO d where d.xno = :xno");
      q.setParameter("xno",xNo);
      result = (XxxDTO) q.uniqueResult();
    } catch (HibernateException ex) {
      log.error("hibernate error", ex);
      throw new DAOException("hibernate error:" + ex.toString());
    } finally {
      closeSession(session);
    }

Here is the full text of exception.

net.sf.hibernate.type.SerializationException: could not deserialize
      at net.sf.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:197)
      at net.sf.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:220)
      at net.sf.hibernate.type.SerializableType.fromBytes(SerializableType.java:73)
      at net.sf.hibernate.type.SerializableType.get(SerializableType.java:38)
      at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:62)
      at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:53)
      at net.sf.hibernate.type.AbstractType.hydrate(AbstractType.java:66)
      at net.sf.hibernate.loader.Loader.hydrate(Loader.java:680)
      at net.sf.hibernate.loader.Loader.loadFromResultSet(Loader.java:621)
      at net.sf.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:580)
      at net.sf.hibernate.loader.Loader.getRow(Loader.java:495)
      at net.sf.hibernate.loader.Loader.prepareResultSetRow(Loader.java:209)
      at net.sf.hibernate.loader.Loader.doQuery(Loader.java:282)
      at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
      at net.sf.hibernate.loader.Loader.doList(Loader.java:1027)
      at net.sf.hibernate.loader.Loader.list(Loader.java:1018)
      at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:854)
      at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1544)
      at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
      at net.sf.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:550)
      at com.tsk.beyanname.dao.hibernate.this.findByTcKimlikNo(this.java:32)
      at test.tsk.beyanname.dao.hibernate.TestThis.testFindByTcKimlikNo(TestThis.java:37)
      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 junit.framework.TestCase.runTest(TestCase.java:154)
      at junit.framework.TestCase.runBare(TestCase.java:127)
      at junit.framework.TestResult$1.protect(TestResult.java:106)
      at junit.framework.TestResult.runProtected(TestResult.java:124)
      at junit.framework.TestResult.run(TestResult.java:109)
      at junit.framework.TestCase.run(TestCase.java:118)
      at junit.framework.TestSuite.runTest(TestSuite.java:208)
      at junit.framework.TestSuite.run(TestSuite.java:203)
      at junit.framework.TestSuite.runTest(TestSuite.java:208)
      at junit.framework.TestSuite.run(TestSuite.java:203)
      at com.borland.jbuilder.unittest.JBTestRunner.run(JBTestRunner.java:210)
      at com.borland.jbuilder.unittest.JBTestRunner.initiateTest(JBTestRunner.java:252)
      at com.borland.jbuilder.unittest.JBTestRunner.main(JBTestRunner.java:558)
Caused by: java.io.StreamCorruptedException: invalid stream header
      at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:737)
      at java.io.ObjectInputStream.<init>(ObjectInputStream.java:253)
      at net.sf.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:189)
      ... 38 more

any ideas?
0
Comment
Question by:alikoank
  • 9
  • 6
  • 5
20 Comments
 
LVL 35

Expert Comment

by:TimYates
ID: 12053554
Does "XxxDTO" implement Serializable?
0
 
LVL 35

Expert Comment

by:TimYates
ID: 12053556
Ahhh...sorry...didn't read the question properly ;-)
0
 
LVL 35

Expert Comment

by:TimYates
ID: 12053560
Is this right:

      Query q = session.createQuery("fromXxxDTO d where d.xno = :xno");

Shouldn't it be:

      Query q = session.createQuery("from XxxDTO as d where d.xno = :xno");
0
 
LVL 35

Expert Comment

by:TimYates
ID: 12053567
I always use fully qualified classnames in the queries....not sure if that helps:

      Query q = session.createQuery( "from org.your.package.XxxDTO as d where d.xno = :xno");
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12053580
If the query doesn't normally return a unique result, try just operating on the first one instead of calling uniqueResult
0
 
LVL 4

Author Comment

by:alikoank
ID: 12053670
@TimYates
     its just a typo I am not getting SQL Exceptions :-) and giving fully qualified name has not changed anything.

@CEHJ
    using q.list() instead of q.uniqueResult() gave me an empty list when it should contain one XxxDTO.

0
 
LVL 35

Expert Comment

by:TimYates
ID: 12053698
>     at com.tsk.beyanname.dao.hibernate.this.findByTcKimlikNo(this.java:32)
 
Which line is line 32?
0
 
LVL 35

Expert Comment

by:TimYates
ID: 12053703
I guess: result = (XxxDTO) q.uniqueResult();

Does list() throw the exception?
0
 
LVL 4

Author Comment

by:alikoank
ID: 12053730
32: throw new DAOException("hibernate error:" + ex.toString());
0
 
LVL 4

Author Comment

by:alikoank
ID: 12053736
and yes list() throws the exception too
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 86

Expert Comment

by:CEHJ
ID: 12053737
>>using q.list() instead of q.uniqueResult() gave me an empty list when it should contain one XxxDTO.

I can't think how you can get anything more than null back then, if you get an empty list without the uniqueness
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 250 total points
ID: 12053743
Might be worth checking that your mapping is correct
0
 
LVL 35

Assisted Solution

by:TimYates
TimYates earned 250 total points
ID: 12053765
Are you sure that the same version of XxxDTO exists in hibernate and your client?

This is a confusing error :-(

I guess it is getting null back as it is failing with a SerializationException...  Which implies it is trying to return something, but it cannot deserialize it...
0
 
LVL 35

Expert Comment

by:TimYates
ID: 12053772
>  Are you sure that the same version of XxxDTO exists in hibernate and your client?

I meant:

 Are you sure that the same version of XxxDTO.class exists in hibernate and your client?  Compiled with the same JDK?
0
 
LVL 4

Author Comment

by:alikoank
ID: 12053778
ok. guys thank for your effort. it probably has something to do with mu mapping
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12053921
8-)
0
 
LVL 4

Author Comment

by:alikoank
ID: 12054351
yep. I solved it,
I had declared a many-to-one relation as a property in hbm file.
0
 
LVL 35

Expert Comment

by:TimYates
ID: 12054418
Cool :-)

After a week of trying hibernate/jboss/xdoclet out, I have to say that the Hibernate exceptions could be a little bit more descriptive ;-)

Good luck with it :-)

Tim
0
 
LVL 4

Author Comment

by:alikoank
ID: 12054543
>>  Hibernate exceptions could be a little bit more descriptive ;-)

could not agree more.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12054552
Glad you got it fixed
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now