The .remove() method of some Entity beans I wrote and
deployed in JBoss 3.0.0 is now throwing a "Managed
Connection = null" exception in Jboss 3.0.3.

I earlier noticed that these entities gave a "you are not
getting the semantics you expect" warning (both in
Jboss 3.0.0 and 3.0.3) but I ignored this warning in
Jboss 3.0.0. Could this be the cause of the exception
now thrown in Jboss 3.0.3?

The funny thing is that if you keep looping on the remove
(), where the number of iterations is the record length of
the underlying table + 1, it eventually works! So its like
the managed connection is restored after a certain
number of failed attempts. What could this mean?

Note that this remove() method is NOT called directly
from a servlet, but through a stateless session bean.

The bean is uses BMP

#!!!!!!!Here is the Session bean level Method that calls the
remove it is Stateless

public void deletePortal(Integer portalID) throws
PortalException {

PortalSettingsHome portalSettingsHome;
PortalRolesHome portalRolesHome;
PortalUsersHome portalUsersHome;
PortalsHome portalsHome;

java.util.Iterator i;

try{
portalSettingsHome = (PortalSettingsHome)
EjbUtilities.getHome("portal/PortalSettings",
PortalSettingsHome.class);
portalRolesHome = (PortalRolesHome)
EjbUtilities.getHome("portal/PortalRoles",
PortalRolesHome.class);
portalUsersHome = (PortalUsersHome)
EjbUtilities.getHome("portal/PortalUsers",
PortalUsersHome.class);
portalsHome = (PortalsHome) EjbUtilities.getHome
("portal/Portals", PortalsHome.class);

// remove some dependencies

i = portalSettingsHome.findByPortal
(portalID).iterator();
while(i.hasNext()){
((com.sw.portal.entity.portalSetting.PortalSettings)
i.next()).remove();
}

i = portalRolesHome.findByPortal(portalID).iterator();
while(i.hasNext()){
((PortalRoles)i.next()).remove();
}

i = portalUsersHome.findByPortal
(portalID).iterator();
while(i.hasNext()){
((PortalUsers)i.next()).remove();
}

//finally, remove the Portal

portalsHome.findByPrimaryKey(portalID).remove(); //
Here is where the exception is thrown

} catch (Exception e) {
throw new PortalException(e.getMessage());
}

}

#!!!!!!! Here is the Entity bean level remove method it is a BMP

public void ejbRemove() {
try
{
String sqlStmt = "DELETE FROM Portals WHERE
PortalID = ? ";
con = ds.getConnection();
PreparedStatement stmt = con.prepareStatement
(sqlStmt);

stmt.setInt(1, portalID);
stmt.executeUpdate();
stmt.close();

}catch (Exception e)
{
throw new EJBException(e);
}finally
{
try
{
if (con != null)
{
con.close();
}
} catch (SQLException sqle) {}
}
}


Here is a code fragment of the exception

java.lang.IllegalArgumentException: disconnect
(ManagedConnection mc: null, Object c:
org.jboss.resource.adapter.jdbc.local.LocalConnection@70ad
76) called with unknown managed connection at
org.jboss.resource.connectionmanager.BaseConnectionMana
ger2.unregisterAssociation
(BaseConnectionManager2.java:661) at
org.jboss.resource.connectionmanager.BaseConnectionMana
ger2.disconnect(BaseConnectionManager2.java:619) at
org.jboss.resource.connectionmanager.CachedConnectionMa
nager.disconnect(CachedConnectionManager.java:371) at
org.jboss.resource.connectionmanager.CachedConnectionMa
nager.popMetaAwareObject
(CachedConnectionManager.java:160) at
org.jboss.resource.connectionmanager.CachedConnectionInte
rceptor.invoke(CachedConnectionInterceptor.java:190) at
org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke
(EntityReentranceInterceptor.java:64) at
org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke
(EntityInstanceInterceptor.java:152) at
org.jboss.ejb.plugins.EntityLockInterceptor.invoke
(EntityLockInterceptor.java:107) at
org.jboss.ejb.plugins.EntityCreationInterceptor.invoke
(EntityCreationInterceptor.java:69) at
org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext
(AbstractTxInterceptor.java:107) at
org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions
(TxInterceptorCMT.java:178) at
org.jboss.ejb.plugins.TxInterceptorCMT.invoke
(TxInterceptorCMT.java:60) at
org.jboss.ejb.plugins.SecurityInterceptor.invoke
(SecurityInterceptor.java:130) at
org.jboss.ejb.plugins.LogInterceptor.invoke
(LogInterceptor.java:203) at
org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:493)
at org.jboss.ejb.Container.invoke(Container.java:712) at
org.jboss.ejb.EntityContainer.invoke
(EntityContainer.java:1058) at
org.jboss.mx.server.MBeanServerImpl.invoke
(MBeanServerImpl.java:517) at
org.jboss.invocation.local.LocalInvoker.invoke
(LocalInvoker.java:98) at
org.jboss.invocation.InvokerInterceptor.invoke
(InvokerInterceptor.java:102) at
org.jboss.proxy.TransactionInterceptor.invoke
(TransactionInterceptor.java:77) at
org.jboss.proxy.SecurityInterceptor.invoke
(SecurityInterceptor.java:80) at
org.jboss.proxy.ejb.EntityInterceptor.invoke
(EntityInterceptor.java:116) at
org.jboss.proxy.ClientContainer.invoke
(ClientContainer.java:76) at $Proxy282.remove(Unknown
Source) at
com.sw.portal.session.PortalManagerBean.deletePortal
(Unknown Source) at java.lang.reflect.Method.invoke(Native
Method) at
org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor
.invoke(StatelessSessionContainer.java:660) at
org.jboss.resource.connectionmanager.CachedConnectionInte
rceptor.invoke(CachedConnectionInterceptor.java:186) at
org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.inv
oke(StatelessSessionInstanceInterceptor.java:77) at
org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext
(AbstractTxInterceptor.java:107) at
org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions
(TxInterceptorCMT.java:178) at
org.jboss.ejb.plugins.TxInterceptorCMT.invoke
(TxInterceptorCMT.java:60) at
org.jboss.ejb.plugins.SecurityInterceptor.invoke
(SecurityInterceptor.java:130) at
org.jboss.ejb.plugins.LogInterceptor.invoke
(LogInterceptor.java:203) at
org.jboss.ejb.StatelessSessionContainer.invoke
(StatelessSessionContainer.java:313) at
org.jboss.ejb.Container.invoke(Container.java:712) at
org.jboss.mx.server.MBeanServerImpl.invoke
(MBeanServerImpl.java:517) at
org.jboss.invocation.local.LocalInvoker.invoke
(LocalInvoker.java:98) at
org.jboss.invocation.InvokerInterceptor.invoke
(InvokerInterceptor.java:102) at
org.jboss.proxy.TransactionInterceptor.invoke
(TransactionInterceptor.java:77) at
org.jboss.proxy.SecurityInterceptor.invoke
(SecurityInterceptor.java:80) at
org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke
(StatelessSessionInterceptor.java:111) at
org.jboss.proxy.ClientContainer.invoke
(ClientContainer.java:76) at $Proxy275.deletePortal(Unknown
Source) at
com.sw.admin.module.admin.AdminModuleBean.deletePortal
s(Unknown Source) at
com.sw.admin.module.admin.AdminModuleBean.execute
(Unknown Source)