A while back, when the jboss forum was down for a couple of days, I posted the message below at jboss-user@lists.sourceforge.net and got a fast answer saying I was bumping into a known bug.

I just tested the same with 3.0.1RC1 and the issue is still there, but I can't seem to find a bug (assuming I am looking in the right place).

So my question is, whether the behaviour below is indeed a known bug and if someone knows the bug#, so I can to track it waiting for a solution.

To be honest, As this is such a 'common' thing to do (I would think), it surpises me that this would not work (perhaps I am just doing something wrong).

Here is the original post and reply

Thanks for any help.

....

Known bug.

On tor, 2002-06-06 at 23:24, Peter Coppens wrote:
> Hi,
>
> I wonder whether anyone has experienced problems with one-to-many CMR, where
> the many bean has a composite primary key.
>
> It is a 'typical' vendor-vendoritems relation. Primary key for the vendor is
> email, primary key for the vendoritem is (email,id).
>
> The code is below and it throws an exception when accessing any of the
> vendoritems attributes.
>
> The 'strange' thing is that when there is only one vendoritem for a given
> vendor it works fine. When there is more than one, I get the exception as
> listed after the code.
> When I make the primary key in the vendoritem just the id, it works fine as
> well.
>
> Tracing what is returned from the RDBMS looks ok to me.
>
> Thanks,
>
> Peter
>
>
> ------------
> Code extract
> ------------
> public LolVendorItemInfo[] getVendorItems ( String email )
> {
> try
> {
> ArrayList lolVendorItemList = new ArrayList ( 50 );
> LolVendor lolVendor = this.lolVendorHome.findByPrimaryKey ( email );
> Collection lolVendorItemColl = lolVendor.getItems ( );
> Iterator lolVendorItemIterator = lolVendorItemColl.iterator ( );
> while ( lolVendorItemIterator.hasNext ( ) )
> {
> try
> {
> LolVendorItem lolVendorItem = ( LolVendorItem )
> lolVendorItemIterator.next ( );
> LolVendorItemInfo lolVendorItemInfo = new LolVendorItemInfo (
> lolVendor.getEmail ( ) );
> lolVendorItemInfo.setItemId ( lolVendorItem.getId ( ) ); /*
> Exception is thrown here */
> lolVendorItemInfo.setItemDescription (
> lolVendorItem.getDescription ( ) );
> lolVendorItemInfo.setItemPrice ( lolVendorItem.getPrice ( ) );
> lolVendorItemList.add ( lolVendorItemInfo );
> }
> catch ( Exception e )
> {
> e.printStackTrace ( System.out );
> }
> }
> return ( LolVendorItemInfo[] ) lolVendorItemList.toArray ( new
> LolVendorItemInfo [ lolVendorItemList.size ( ) ] );
> }
> catch ( FinderException e )
> {
> throw new EJBException ( "Unable to get list of vendor items ", e );
> }
> }
>
> -------------------------
> Small part of stack trace
> -------------------------
> 2002-06-06 12:36:37,992 DEBUG
> [org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.LolVendorItemBean]
> Executing SQL: SELECT Email, Id,Description, Price FROM lol_vendoritem WHERE
> (Email=? AND Id=?) OR (Email=? AND Id=?) OR (Email=? AND Id=?) OR (Email=?
> AND Id=?) OR (Email=? AND Id=?) OR (Email=? AND Id=?) OR (Email=? AND Id=?)
> OR (Email=? AND Id=?) OR (Email=? AND Id=?) OR (Email=? AND Id=?)
> 2002-06-06 12:36:38,123 ERROR [org.jboss.ejb.plugins.LogInterceptor]
> TransactionRolledbackException, causedBy:
> javax.ejb.NoSuchEntityException: Entity not found:
> primaryKey=com.ddtek.lol.LolVendorItemPK@f92a41
> at
> org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.execute(JDBCLoadEntityC
> ommand.java:165)
> ....
>
> -----------
> Part of ejb-jar.xml
> -----------
>
>
> <display-name>LolVendorBean</display-name>
> <ejb-name>LolVendorBean</ejb-name>
>
> <local-home>com.ddtek.lol.LolVendorHome</local-home>
> com.ddtek.lol.LolVendor
> <ejb-class>com.ddtek.lol.LolVendorBean</ejb-class>
>
> <persistence-type>Container</persistence-type>
> <prim-key-class>java.lang.String</prim-key-class>
>
> True
> <cmp-version>2.x</cmp-version>
>
> <abstract-schema-name>LolVendorBean</abstract-schema-name>
>
> <cmp-field>
> no description
> <field-name>Email</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>Name</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>Phone</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>Fax</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>StreetAndNr</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>PostalCode</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>City</field-name>
> </cmp-field>
>
> <primkey-field>Email</primkey-field>
>
> <security-identity>
>
> <use-caller-identity></use-caller-identity>
> </security-identity>
>
>
>
> <query-method>
> <method-name>findAll</method-name>
> <method-params />
> </query-method>
> <ejb-ql>select Object(o) from LolVendorBean as o</ejb-ql>
>
>
>
>
>
>
> <display-name>LolVendorItemBean</display-name>
> <ejb-name>LolVendorItemBean</ejb-name>
>
> <local-home>com.ddtek.lol.LolVendorItemHome</local-home>
> com.ddtek.lol.LolVendorItem
> <ejb-class>com.ddtek.lol.LolVendorItemBean</ejb-class>
>
> <persistence-type>Container</persistence-type>
>
> True
> <cmp-version>2.x</cmp-version>
>
> <abstract-schema-name>LolVendorItemBean</abstract-schema-name>
>
> <cmp-field>
> no description
> <field-name>Email</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>Id</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>Description</field-name>
> </cmp-field>
> <cmp-field>
> no description
> <field-name>Price</field-name>
> </cmp-field>
>
> <prim-key-class>com.ddtek.lol.LolVendorItemPK</prim-key-class>
>
> <security-identity>
>
> <use-caller-identity></use-caller-identity>
> </security-identity>
>
>
>
> <query-method>
> <method-name>findAll</method-name>
> <method-params />
> </query-method>
> <ejb-ql>select Object(o) from LolVendorBean as o</ejb-ql>
>
>
>
> .....
> <ejb-relation>
> <ejb-relation-name>VendorSellsItems</ejb-relation-name>
>
> <ejb-relationship-role>
>
> <ejb-relationship-role-name>VendorSellsItems</ejb-relationship-role-name>
> One
> <relationship-role-source>
> <ejb-name>LolVendorBean</ejb-name>
> </relationship-role-source>
> <cmr-field>
> <cmr-field-name>Items</cmr-field-name>
> <cmr-field-type>java.util.Collection</cmr-field-type>
> </cmr-field>
> </ejb-relationship-role>
>
> <ejb-relationship-role>
>
> <ejb-relationship-role-name>ItemIsSoldByVendor</ejb-relationship-role-name>
> Many
> <relationship-role-source>
> <ejb-name>LolVendorItemBean</ejb-name>
> </relationship-role-source>
> <cmr-field>
> <cmr-field-name>Vendor</cmr-field-name>
> </cmr-field>
> </ejb-relationship-role>
>
> </ejb-relation>
>