Invalid owner exception.

Question

Hi all:
If I execute this application I get the next exception when invoke the second Sample method from main.
oracle.jbo.InvalidOwnerException: JBO-25302: Component object MyView has no parent
oracle.jbo.server.ApplicationModuleImpl oracle.jbo.server.ComponentObjectImpl.getRootApplicationModule()
oracle.jbo.server.DBTransaction oracle.jbo.server.ViewObjectImpl.getDBTransaction()
void oracle.jbo.server.ViewObjectImpl.addRowSet(oracle.jbo.server.ViewRowSetImpl)
oracle.jbo.server.ViewRowSetImpl oracle.jbo.server.ViewObjectImpl.createViewRowSet(java.lang.String, boolean)
oracle.jbo.server.ViewRowSetImpl oracle.jbo.server.ViewObjectImpl.getDefaultRowSet()
void oracle.jbo.server.ViewObjectImpl.executeQuery()
java.util.Vector SampleImpl.getData()
java.lang.String SAmple.g()
void Sample.main(java.lang.String[])
If I modify the getData method in the application module and I insert this line at top it works:
public String getData() {
//********** This is the inserted line *********///
MyView = (MyViewImpl)findViewObject("MyView");
getMyView().executeQuery(); // Any query.
MyViewRowImpl row = (MyViewRowImpl)getMyView().first();
if(row != null) return row.getSomeAttribute();
return "no data";
Is there any other solution?? Any PoolMgr config parameter lost???
Here is the code.
public class Sample {
ApplicationPool pool = null;
public Sample() throws Exception {
String am = "sample.MyApplicationModule";
String jdbc = "jdbc:oracle:thin:login/pwd@machine:1521:sid";
if(!PoolMgr.getInstance().isPoolCreated(name + connectionString)) {
Hashtable env = new Hashtable(2);
env.put(Context.INITIAL_CONTEXT_FACTORY, JboContext.JBO_CONTEXT_FACTORY);
env.put(JboContext.DEPLOY_PLATFORM, JboContext.PLATFORM_LOCAL);
PoolMgr.getInstance().createPool(am + jdbc, am, jdbc, env);
pm = PoolMgr.getInstance().getPool(am + jdbc);
public String getData() {
MyApplicationModule am = null;
try {
am = (MyApplicationModule)pm.checkout();
return am.getData(); // From a MyViewObject class
} catch (Exception e) {
return e.getMessage();
} finally {
pm.checkin(am);
public static void main(String[] args) throws Exception {
Sample s = new Sample();
System.out.println(s.getData());
Sample s1 = new Sample();
System.out.println(s.getData());
This is my application module.
public class SampleImpl
extends oracle.jbo.server.ApplicationModuleImpl
implements common.Sample {
protected MyViewImpl MyView;
public SampleImpl() {
public MyViewImpl getMyView() {
if (MyView == null) {
MyView = (MyViewImpl)findViewObject("MyView");
return MyView;
public String getData() {
getMyView().executeQuery(); // Any query.
MyViewRowImpl row = (MyViewRowImpl)getMyView().first();
if(row != null) return row.getSomeAttribute();
return "no data";
Thanks in advance.
Joaquin.
null

Answer 1

I had a similar problem, maybe you should have a look at the corrsponding post:
http://technet.oracle.com:89/ubb/Forum2/HTML/006553.html
especially john Smiljanic's response posted March 01...
Hope this helps, Remi