I have a CMR relation defined as follows (using xdoclet)
/**
* @ejb.interface-method
* @ejb.relation
* name="WeightGroup-Weight"
* role-name="WeightGroup-Weight-table"
* target-ejb="DMWeightEJB"
* target-role-name="WeightGroup-Weight-field"
*
* @jboss.relation
* related-pk-field="UOID"
* fk-column="f_Weight"
* @jboss.target-relation
* related-pk-field="UOID"
* fk-column="WeightGroup"
* @jboss.relation-mapping style="relation-table"
* @jboss.relation-table
* table-name="WeightGroup_Weight"
*/
public abstract Collection getWeight();
However, I get a NPE when I try to call getWeight on an object which has one
(or more) objects in the relationship.
2003-09-04 19:43:52,953 ERROR [org.jboss.ejb.plugins.LogInterceptor]
TransactionRolledbackLocalException in method: public abstract
java.util.Collection org.ictrace.client.DMWeightGroupEJBLocal.getWeight(),
causedBy:
java.lang.NullPointerException
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadRelationCommand.execute(JDBCLoadRelat
ionCommand.java:141)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.loadRelation(JDBCStoreManage
r.java:705)
at
org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.load(JDBCCMRFieldBr
idge.java:1119)
at
org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.getInstanceValue(JD
BCCMRFieldBridge.java:559)
at
org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.getValue(JDBCCMRFie
ldBridge.java:515)
at
org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler.invoke(Entity
BridgeInvocationHandler.java:124)
at org.jboss.proxy.compiler.Runtime.invoke(Runtime.java:59)
at org.ictrace.server.DMWeightGroupEJBCMP$Proxy.getWeight(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at
org.jboss.ejb.EntityContainer$ContainerInterceptor.invoke(EntityContainer.ja
va:1059)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCRelationInterceptor.invoke(JDBCRelationIn
terceptor.java:95)
at
org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchron
izationInterceptor.java:301)
at
org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(Cach
edConnectionInterceptor.java:186)
at
org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInt
erceptor.java:82)
at
org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterce
ptor.java:174)
at
org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.jav
a:89)
at
org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterce
ptor.java:53)
at
org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor
.java:84)
at
org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.
java:243)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:104)
at
org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:11
7)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
at
org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinde
rInterceptor.java:122)
at org.jboss.ejb.EntityContainer.internalInvoke(EntityContainer.java:484)
at org.jboss.ejb.Container.invoke(Container.java:700)
at
org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFacto
ry.java:353)
at org.jboss.ejb.plugins.local.EntityProxy.invoke(EntityProxy.java:38)
at $Proxy96.getWeight(Unknown Source)
When I switch trace loggin on for the CMR stuff, I see that a query is
started
SELECT WeightGroup_UOID, f_Weight_UOID FROM WEIGHTGROUP_WEIGHT WHERE
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR (WeightGroup_UOID=?) OR
(WeightGroup_UOID=?)
with as parameters all the possible weightgroup_uoid values (from the
weightgroup table, not from the relation table), which seems to be a query
which will return way too many results. Once the first result is retrieved,
the crash occurs.
I am using mode A (no other DB modifying users).
Can anybody help me solve this problem?
Thanks,
Joachim
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