I've been scratching my head over this one for a while...
I have a parent object that participates in an owned one-to-many
relationship with a child object. After the parent object is created,
it is retrieved with its collection of children in the selected fetch
group, and then detached. Then, I add a child to the parent's
collection of children, and attach it. If I persist using
pm.makePersistent(parent), everything works fine. If I persist using
pm.makePersistentAll(listOfParent) then sometimes it works, and
sometimes it throws:
Caused by: java.lang.NullPointerException
at org.datanucleus.sco.SCOUtils.attachAddNewElements(SCOUtils.java:
743)
I am attaching the code in the next post.
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