Hi,
We are hitting an intermittent issue with db-ojb-1.0.3.
At random times we hit the following exception while ojb
tries to create an object from a Derby db.
org.apache.ojb.broker.PersistenceBrokerException:
org.apache.ojb.broker.metadata.MetadataException: IllegalAccess error
setting field:userAccount in
object:com.cisco.ipce.engine.datamodel.EndUser
at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown
Source)
at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(Unknown
Source)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(Unknown
Source)
at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(Unknown
Source)
at
org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(Unknown
Source)
at com.cisco.ipce.engine.sal.dataaccess.DBDAO.get(DBDAO.java:367)
The root cause being a
Caused by: java.lang.IllegalArgumentException at
sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:63)
at java.lang.reflect.Field.set(Field.java:656)
... 59 more
The error occurs on different classes at different times. Once we hit
the error, it does
not go away no matter what we do (tomcat restart etc). Once the
problem stops happening
(sometimes on pc restart) it never happens again for a long time.
Our repository_user.xml for all classes are similar.
<class-descriptor class="com.cisco.ipce.engine.datamodel.EndUser"
table="UserBase">
<field-descriptor column="OID" jdbc-type="INTEGER" name="OID"
autoincrement="true" primarykey="true"/>
<field-descriptor column="userAccountId" jdbc-type="INTEGER"
name="userAccountId"/>
<reference-descriptor name="userAccount"
class-ref="com.cisco.ipce.engine.datamodel.IPCEUserAccount"
auto-retrieve="true" auto-update="object" auto-delete="object" >
<foreignkey field-ref="userAccountId"/>
</reference-descriptor>
<field-descriptor column="type" jdbc-type="INTEGER" name="type"/>
public class EndUser extends UserBase {
...
...
}
public abstract class UserBase extends IPCEObject{
...
....
protected UserAccount userAccount;
...
}
I am not sure what we are doing wrong and even if we are why is the
error intermittent ?
All classes where the error occurs have the same pattern where a
protected attribute
of the super-class is being set via the sub-class repository_user.xml
entry. The attribute
is always an auto-retrieve=true; auto-update="object" and
auto-delete="object" class to
which the offending class holds a foreign key.
Any help appreciated.
Thanks,
Rajesh
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