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Posted to ojb-user@db.apache.org by "Clute, Andrew" <An...@osn.state.oh.us> on 2004/08/13 20:03:02 UTC
Jboss and ClassCastException (MetadataManager and JdbcConnectionDescriptor) -- anyone else have it?
I am running OJB 1.0 with JBoss 3.2.5.
On *occasional* redeployments of my EAR file (with nested Jars and Wars)
I will get a nasty ClassCastException that is only fixable by restarting
Jboss. This happens in the MetadataManager.buildDefaultKey() method.
The top part of the stack trace is posted below. From what I can tell,
the exception stems from not that it is the wrong class attempting to be
casted, but it is an instance of a class that is from a previous
deployment (and thus classloader) that is trying to be casted in to the
same class type in a new class loader.
I have taken a quick look at MetadataManager, and don't see anything
terribly obvious as to the cause -- which I would assume is a static
instance to the Collection of JdbcConnectionsDescriptors. There is a a
ThreadLocal variable, but I don't think that is the cause.
So, my question is: has anyone else seen this? Can anyone think of why
on a undeployment that not all of the OJB classes are removed from the
VM?
Thanks!
Here is the stacktrace:
2004-08-11 13:24:22,923 ERROR [org.jboss.ejb.plugins.LogInterceptor]
RuntimeException:
java.lang.ClassCastException
at
org.apache.ojb.broker.metadata.MetadataManager.buildDefaultKey(Unknown
Source)
at org.apache.ojb.broker.metadata.MetadataManager.init(Unknown
Source)
at org.apache.ojb.broker.metadata.MetadataManager.<init>(Unknown
Source)
at
org.apache.ojb.broker.metadata.MetadataManager.getInstance(Unknown
Source)
at
org.apache.ojb.broker.core.PersistenceBrokerFactoryBaseImpl.getDefaultKe
y(Unknown Source)
at
org.apache.ojb.broker.core.PersistenceBrokerFactoryBaseImpl.defaultPersi
stenceBroker(Unknown Source)
at
org.apache.ojb.broker.PersistenceBrokerFactory.defaultPersistenceBroker(
Unknown Source)
at
org.osn.persistence.PersistenceSessionPBImpl.getBroker(PersistenceSessio
nPBImpl.java:79)
Re: Jboss and ClassCastException (MetadataManager and JdbcConnectionDescriptor)
-- anyone else have it?
Posted by Armin Waibel <ar...@apache.org>.
Hi Andrew,
think this is a ClassLoader problem. Maybe ojb.jar itself or one of the
jars OJB depends on is not correctly reloaded.
Did you follow the instructions made by Stephen Ting
http://db.apache.org/ojb/docu/guides/deployment.html#Packing+an+.ear+file
regards,
Armin
Clute, Andrew wrote:
> I am running OJB 1.0 with JBoss 3.2.5.
>
> On *occasional* redeployments of my EAR file (with nested Jars and Wars)
> I will get a nasty ClassCastException that is only fixable by restarting
> Jboss. This happens in the MetadataManager.buildDefaultKey() method.
>
> The top part of the stack trace is posted below. From what I can tell,
> the exception stems from not that it is the wrong class attempting to be
> casted, but it is an instance of a class that is from a previous
> deployment (and thus classloader) that is trying to be casted in to the
> same class type in a new class loader.
>
> I have taken a quick look at MetadataManager, and don't see anything
> terribly obvious as to the cause -- which I would assume is a static
> instance to the Collection of JdbcConnectionsDescriptors. There is a a
> ThreadLocal variable, but I don't think that is the cause.
>
> So, my question is: has anyone else seen this? Can anyone think of why
> on a undeployment that not all of the OJB classes are removed from the
> VM?
>
> Thanks!
>
> Here is the stacktrace:
>
> 2004-08-11 13:24:22,923 ERROR [org.jboss.ejb.plugins.LogInterceptor]
> RuntimeException:
> java.lang.ClassCastException
> at
> org.apache.ojb.broker.metadata.MetadataManager.buildDefaultKey(Unknown
> Source)
> at org.apache.ojb.broker.metadata.MetadataManager.init(Unknown
> Source)
> at org.apache.ojb.broker.metadata.MetadataManager.<init>(Unknown
> Source)
> at
> org.apache.ojb.broker.metadata.MetadataManager.getInstance(Unknown
> Source)
> at
> org.apache.ojb.broker.core.PersistenceBrokerFactoryBaseImpl.getDefaultKe
> y(Unknown Source)
> at
> org.apache.ojb.broker.core.PersistenceBrokerFactoryBaseImpl.defaultPersi
> stenceBroker(Unknown Source)
> at
> org.apache.ojb.broker.PersistenceBrokerFactory.defaultPersistenceBroker(
> Unknown Source)
> at
> org.osn.persistence.PersistenceSessionPBImpl.getBroker(PersistenceSessio
> nPBImpl.java:79)
>
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Re: Jboss and ClassCastException (MetadataManager and
JdbcConnectionDescriptor) -- anyone else have it?
Posted by Clay Mitchell <cl...@pfd.net>.
I get the same thing pretty much every time I redeploy with Orion
Application Server.
Any idea what causes this? Is there any way to stop it?
Thanks
-Clay
> I am running OJB 1.0 with JBoss 3.2.5.
>
> On *occasional* redeployments of my EAR file (with nested Jars and Wars)
> I will get a nasty ClassCastException that is only fixable by restarting
> Jboss. This happens in the MetadataManager.buildDefaultKey() method.
>
> The top part of the stack trace is posted below. From what I can tell,
> the exception stems from not that it is the wrong class attempting to be
> casted, but it is an instance of a class that is from a previous
> deployment (and thus classloader) that is trying to be casted in to the
> same class type in a new class loader.
>
> I have taken a quick look at MetadataManager, and don't see anything
> terribly obvious as to the cause -- which I would assume is a static
> instance to the Collection of JdbcConnectionsDescriptors. There is a a
> ThreadLocal variable, but I don't think that is the cause.
>
> So, my question is: has anyone else seen this? Can anyone think of why
> on a undeployment that not all of the OJB classes are removed from the
> VM?
>
> Thanks!
>
> Here is the stacktrace:
>
> 2004-08-11 13:24:22,923 ERROR [org.jboss.ejb.plugins.LogInterceptor]
> RuntimeException:
> java.lang.ClassCastException
> at
> org.apache.ojb.broker.metadata.MetadataManager.buildDefaultKey(Unknown
> Source)
> at org.apache.ojb.broker.metadata.MetadataManager.init(Unknown
> Source)
> at org.apache.ojb.broker.metadata.MetadataManager.<init>(Unknown
> Source)
> at
> org.apache.ojb.broker.metadata.MetadataManager.getInstance(Unknown
> Source)
> at
> org.apache.ojb.broker.core.PersistenceBrokerFactoryBaseImpl.getDefaultKe
> y(Unknown Source)
> at
> org.apache.ojb.broker.core.PersistenceBrokerFactoryBaseImpl.defaultPersi
> stenceBroker(Unknown Source)
> at
> org.apache.ojb.broker.PersistenceBrokerFactory.defaultPersistenceBroker(
> Unknown Source)
> at
> org.osn.persistence.PersistenceSessionPBImpl.getBroker(PersistenceSessio
> nPBImpl.java:79)
>
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