What state gets saved when a JPD goes to frozen state?

Hi,
I need to know what state of JPD gets saved when it goes into frozen state after some error. Is it just the non-transient member variables that get persisted? Or is there any information about the point at which the failure occurs in the JPD's execution flow?
For example, lets say that I have a stateful JPD which does the following:
1) Initialize a BufferedFileReader from the input file path
2) Read the file line-by-line:
for (; (this.currentLine = this.reader.readLine()) != null; )
++this.currentLineIndex;
doWork();
If there's a failure while processing, say line# N, then will I be able to get this 'currentLineIndex' value when I unfreeze the JPD and utilize it to seek the file till that line and start from there? From where will the JPD start execution when I unfreeze it? With what state of member variables and from what method/node/line will it start?
I don't know how it works internally, any information regarding what state/execution-context gets persisted when a JPD freezes will be helpful.
Thanks,
Balwinder

A failure causes the transaction that was processing to rollback, so all state changes are lost since the previous commit point. What get's frozen is the request message that started processing of the current transaction.
When the process is unfrozen, the original request message is dispatched causing a new transaction to start and the request is processed again.

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 finally
 try
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 con.close();
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 catch (SQLException e)
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 }// catch
 finally
 try
 if (con!=null)
 con.close();
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 catch (SQLException e)
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 e.getMessage();
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 finally
 try
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 con.close();
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 while (rs.next())
 keys.add(new Integer(rs.getInt(1)));
 }// while
 rs.close();
 s.close();
 con.close();
 return keys.elements();
 } // try
 catch (SQLException e)
 throw new FinderException (e.toString());
 } // catch
}

Hi,
if you look at your error message you will see the problem. In your code you've missed to implement
public void ejbPassivate {}
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import java.lang.Object;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import java.rmi.RemoteException;
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