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Re: [eclipselink-users] Null Pointer Exception when using Scrollable Cursor on a OneToMany Mapping

Hello Rohit,

The line number might be off in my view; it shows that the row might be null and I am not sure what could cause that without an exception or problem occuring in the query. 
Can you send the log just showing the query and the exception with logging set to finest?  Does it go through any iterations before the exception occurs, or is it the fist call to hasNext that throws the exception?
Can you also check the results from executing the generated SQL manually?

Best Regards,
Chris

On 07/07/2011 3:17 AM, Rohit Banga wrote:
Hi All

I am getting a NullPointerException when trying to execute a ReadAllQuery with scrollable cursor enabled. It seems that the exception happens when it tries to access the many side of the mapping.
I am using Eclipselink-2.3. Here is the stack trace:

Exception in thread "main" java.lang.NullPointerException
    at org.eclipse.persistence.internal.queries.JoinedAttributeManager.processDataResults(JoinedAttributeManager.java:1074)
    at org.eclipse.persistence.queries.ScrollableCursor.retrieveNextObject(ScrollableCursor.java:557)
    at org.eclipse.persistence.queries.ScrollableCursor.loadNext(ScrollableCursor.java:397)
    at org.eclipse.persistence.queries.ScrollableCursor.hasNext(ScrollableCursor.java:263)
    at
ScrollableCursorTest.main(ScrollableCursorTest.java:80)

I have attached the sample code along with this mail. Can someone please have a look at it and see what is amiss?
Thanks in Advance!

--
Thanks and Regards
Rohit Banga
Member Technical Staff
Oracle Server Technologies

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