[Hibernate-JIRA] Created: (HHH-5550) Hibernate.createBlob() fails when used in current_session_context_class=thread mode
6:46 a.m.
Hibernate.createBlob() fails when used in current_session_context_class=thread mode
-----------------------------------------------------------------------------------
Key: HHH-5550
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.5.5
Reporter: Zemian Deng
See https://forum.hibernate.org/viewtopic.php?f=1&t=1004366
Here is a unit test failed case:
{code:java}
package deng.hibernate.examples.blob;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.junit.Test;
public class HibernateCreateBlobFailedCase {
@Test
public void createBlob() {
Configuration cfg = new Configuration();
SessionFactory sessionFactory = cfg.configure().buildSessionFactory();
Session session = sessionFactory.getCurrentSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
byte[] blobBytes = new byte[]{};
Hibernate.createBlob(blobBytes, session);
} catch (Throwable e) {
tx.rollback();
throw new RuntimeException(e);
} finally {
sessionFactory.close();
}
}
}
{code}
Set hibernate.cfg.xml with thread session context
{code:xml}
...
<property name="current_session_context_class">thread</property>
...
{code}
You will get this stack trace
{noformat}
java.lang.RuntimeException: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:24)
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:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:502)
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:498)
at org.hibernate.Hibernate.createBlob(Hibernate.java:494)
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:21)
... 22 more
{noformat}
As described in forum, this problem occurred because the session object we get using
{{sessionFactory.getCurrentSession();}} is an wrapped ThreadLocalSessionContext instance
that can not be cast into LobCreationContext. There is no easy way to unwrap and get the
original session object, to pass to createBlob method.
--
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3:39 p.m.
New subject: [Hibernate-JIRA] Commented: (HHH-5550) Hibernate.createBlob() fails when used in current_session_context_class=thread mode
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550?page=c...
]
Gail Badner commented on HHH-5550:
----------------------------------
I believe this would also affect sessions obtained from
ManagedSessionContext.currentSession() and JTASessionContext.currentSession(), which
return org.hibernate.classic.Session, because that does not extend LobCreationContext
either.
In 3.6, session.getLobHelper().createBlob( bytes ), should be used instead.
Zemian, could you give 3.6.0 a try?
Thanks,
Gail
Hibernate.createBlob() fails when used in
current_session_context_class=thread mode
-----------------------------------------------------------------------------------
Key: HHH-5550
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.5.5
Reporter: Zemian Deng
See https://forum.hibernate.org/viewtopic.php?f=1&t=1004366
Here is a unit test failed case:
{code:java}
package deng.hibernate.examples.blob;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.junit.Test;
public class HibernateCreateBlobFailedCase {
@Test
public void createBlob() {
Configuration cfg = new Configuration();
SessionFactory sessionFactory = cfg.configure().buildSessionFactory();
Session session = sessionFactory.getCurrentSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
byte[] blobBytes = new byte[]{};
Hibernate.createBlob(blobBytes, session);
} catch (Throwable e) {
tx.rollback();
throw new RuntimeException(e);
} finally {
sessionFactory.close();
}
}
}
{code}
Set hibernate.cfg.xml with thread session context
{code:xml}
...
<property name="current_session_context_class">thread</property>
...
{code}
You will get this stack trace
{noformat}
java.lang.RuntimeException: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:24)
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:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:502)
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:498)
at org.hibernate.Hibernate.createBlob(Hibernate.java:494)
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:21)
... 22 more
{noformat}
As described in forum, this problem occurred because the session object we get using
{{sessionFactory.getCurrentSession();}} is an wrapped ThreadLocalSessionContext instance
that can not be cast into LobCreationContext. There is no easy way to unwrap and get the
original session object, to pass to createBlob method.
--
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If you think it was sent incorrectly contact one of the administrators:
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9:54 a.m.
New subject: [Hibernate-JIRA] Commented: (HHH-5550) Hibernate.createBlob() fails when used in current_session_context_class=thread mode
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550?page=c...
]
Steve Ebersole commented on HHH-5550:
-------------------------------------
I don't think that is really the reason. I think it is because
{{ThreadLocalSessionContext}} wraps the "real session" in a proxy but does not
"layer" {{LobCreationContext}} into that proxy definition. I'd be shocked
if this does not work from {{ManagedSessionContext}} and {{JTASessionContext}}
Hibernate.createBlob() fails when used in
current_session_context_class=thread mode
-----------------------------------------------------------------------------------
Key: HHH-5550
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.5.5
Reporter: Zemian Deng
See https://forum.hibernate.org/viewtopic.php?f=1&t=1004366
Here is a unit test failed case:
{code:java}
package deng.hibernate.examples.blob;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.junit.Test;
public class HibernateCreateBlobFailedCase {
@Test
public void createBlob() {
Configuration cfg = new Configuration();
SessionFactory sessionFactory = cfg.configure().buildSessionFactory();
Session session = sessionFactory.getCurrentSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
byte[] blobBytes = new byte[]{};
Hibernate.createBlob(blobBytes, session);
} catch (Throwable e) {
tx.rollback();
throw new RuntimeException(e);
} finally {
sessionFactory.close();
}
}
}
{code}
Set hibernate.cfg.xml with thread session context
{code:xml}
...
<property name="current_session_context_class">thread</property>
...
{code}
You will get this stack trace
{noformat}
java.lang.RuntimeException: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:24)
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:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:502)
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:498)
at org.hibernate.Hibernate.createBlob(Hibernate.java:494)
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:21)
... 22 more
{noformat}
As described in forum, this problem occurred because the session object we get using
{{sessionFactory.getCurrentSession();}} is an wrapped ThreadLocalSessionContext instance
that can not be cast into LobCreationContext. There is no easy way to unwrap and get the
original session object, to pass to createBlob method.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://opensource.atlassian.com/projects/hibernate/secure/Administrators....
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
10:11 a.m.
New subject: [Hibernate-JIRA] Updated: (HHH-5550) Hibernate.createBlob() fails when used in current_session_context_class=thread mode
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550?page=c...
]
Steve Ebersole updated HHH-5550:
--------------------------------
Assignee: Steve Ebersole
Fix Version/s: 3.6.1
Hibernate.createBlob() fails when used in
current_session_context_class=thread mode
-----------------------------------------------------------------------------------
Key: HHH-5550
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.5.5
Reporter: Zemian Deng
Assignee: Steve Ebersole
Fix For: 3.6.1
See https://forum.hibernate.org/viewtopic.php?f=1&t=1004366
Here is a unit test failed case:
{code:java}
package deng.hibernate.examples.blob;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.junit.Test;
public class HibernateCreateBlobFailedCase {
@Test
public void createBlob() {
Configuration cfg = new Configuration();
SessionFactory sessionFactory = cfg.configure().buildSessionFactory();
Session session = sessionFactory.getCurrentSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
byte[] blobBytes = new byte[]{};
Hibernate.createBlob(blobBytes, session);
} catch (Throwable e) {
tx.rollback();
throw new RuntimeException(e);
} finally {
sessionFactory.close();
}
}
}
{code}
Set hibernate.cfg.xml with thread session context
{code:xml}
...
<property name="current_session_context_class">thread</property>
...
{code}
You will get this stack trace
{noformat}
java.lang.RuntimeException: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:24)
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:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:502)
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:498)
at org.hibernate.Hibernate.createBlob(Hibernate.java:494)
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:21)
... 22 more
{noformat}
As described in forum, this problem occurred because the session object we get using
{{sessionFactory.getCurrentSession();}} is an wrapped ThreadLocalSessionContext instance
that can not be cast into LobCreationContext. There is no easy way to unwrap and get the
original session object, to pass to createBlob method.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://opensource.atlassian.com/projects/hibernate/secure/Administrators....
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
10:05 p.m.
New subject: [Hibernate-JIRA] Commented: (HHH-5550) Hibernate.createBlob() fails when used in current_session_context_class=thread mode
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550?page=c...
]
Zemian Deng commented on HHH-5550:
----------------------------------
Hi there,
Yes the 3.6 version with "session.getLobHelper().createBlob( bytes )" does
works. Thanks.
I have two additional feedbacks though:
1) In 3.6, even Hibernate.createBlob(blobBytes, session); is marked as deprecated, but if
used, it still produces the same exception mentioned here. So in this case, it's not
just deprecated, but it's broken. (Granted that it only for Thread context scenerio,
but still a bit annoying.).
2) In 3.6, the javadoc on Hibernate.createBlob(blobBytes, session) says: "@deprecated
Use {@link LobHelper#createBlob(byte[])} instead." Now this is not very good hint
since LobHelper is an interface and the only implementation is a private inner class. It
would be more helpful to let user know that they need to get this impl instance by session
instance like "session.getLobHelper().createBlob( bytes )".
Hope this helps,
Zemian Deng
Hibernate.createBlob() fails when used in
current_session_context_class=thread mode
-----------------------------------------------------------------------------------
Key: HHH-5550
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.5.5
Reporter: Zemian Deng
Assignee: Steve Ebersole
Fix For: 3.6.1
See https://forum.hibernate.org/viewtopic.php?f=1&t=1004366
Here is a unit test failed case:
{code:java}
package deng.hibernate.examples.blob;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.junit.Test;
public class HibernateCreateBlobFailedCase {
@Test
public void createBlob() {
Configuration cfg = new Configuration();
SessionFactory sessionFactory = cfg.configure().buildSessionFactory();
Session session = sessionFactory.getCurrentSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
byte[] blobBytes = new byte[]{};
Hibernate.createBlob(blobBytes, session);
} catch (Throwable e) {
tx.rollback();
throw new RuntimeException(e);
} finally {
sessionFactory.close();
}
}
}
{code}
Set hibernate.cfg.xml with thread session context
{code:xml}
...
<property name="current_session_context_class">thread</property>
...
{code}
You will get this stack trace
{noformat}
java.lang.RuntimeException: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:24)
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:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:502)
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:498)
at org.hibernate.Hibernate.createBlob(Hibernate.java:494)
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:21)
... 22 more
{noformat}
As described in forum, this problem occurred because the session object we get using
{{sessionFactory.getCurrentSession();}} is an wrapped ThreadLocalSessionContext instance
that can not be cast into LobCreationContext. There is no easy way to unwrap and get the
original session object, to pass to createBlob method.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://opensource.atlassian.com/projects/hibernate/secure/Administrators....
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
11:09 a.m.
New subject: [Hibernate-JIRA] Resolved: (HHH-5550) Hibernate.createBlob() fails when used in current_session_context_class=thread mode
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550?page=c...
]
Steve Ebersole resolved HHH-5550.
---------------------------------
Resolution: Fixed
Hibernate.createBlob() fails when used in
current_session_context_class=thread mode
-----------------------------------------------------------------------------------
Key: HHH-5550
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5550
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.5.5
Reporter: Zemian Deng
Assignee: Steve Ebersole
Fix For: 3.6.1
Time Spent: 1.3h
Remaining Estimate: 0h
See https://forum.hibernate.org/viewtopic.php?f=1&t=1004366
Here is a unit test failed case:
{code:java}
package deng.hibernate.examples.blob;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.junit.Test;
public class HibernateCreateBlobFailedCase {
@Test
public void createBlob() {
Configuration cfg = new Configuration();
SessionFactory sessionFactory = cfg.configure().buildSessionFactory();
Session session = sessionFactory.getCurrentSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
byte[] blobBytes = new byte[]{};
Hibernate.createBlob(blobBytes, session);
} catch (Throwable e) {
tx.rollback();
throw new RuntimeException(e);
} finally {
sessionFactory.close();
}
}
}
{code}
Set hibernate.cfg.xml with thread session context
{code:xml}
...
<property name="current_session_context_class">thread</property>
...
{code}
You will get this stack trace
{noformat}
java.lang.RuntimeException: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:24)
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:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassCastException: $Proxy4 cannot be cast to
org.hibernate.engine.jdbc.LobCreationContext
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:502)
at org.hibernate.Hibernate.getLobCreator(Hibernate.java:498)
at org.hibernate.Hibernate.createBlob(Hibernate.java:494)
at
deng.hibernate.examples.blob.HibernateCreateBlobFailedCase.createBlob(HibernateCreateBlobFailedCase.java:21)
... 22 more
{noformat}
As described in forum, this problem occurred because the session object we get using
{{sessionFactory.getCurrentSession();}} is an wrapped ThreadLocalSessionContext instance
that can not be cast into LobCreationContext. There is no easy way to unwrap and get the
original session object, to pass to createBlob method.
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hibernate-issues@lists.jboss.org
5 comments
3 participants
participants (3)
-
Gail Badner (JIRA) -
Steve Ebersole (JIRA)
-
Zemian Deng (JIRA)