i had the same issue pop up after making some modifications to
existing code that worked. turned out that one of the child classes
was being referenced as a child from two different parent classes.
this wasn't intended, it was just sloppy refactoring on my part.
for example: Knife child of
say i have a persistent parent class, Employee, with a collection of
child objects, PhoneNumber:
@PersistenceCapable(identityType = IdentityType.APPLICATION)
class Employee implements Serializable
{
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
Long
There have been numerous posts on the subject of a
NullPointerException popping up when the DataNucleus Enhancer runs. At
one point, I was able to make this problem go away, and now, it is
AGAIN preventing me from running my project.
I've seen about 5 different explanations for what's happening.
removing all of the jars from my user-defined library for gdata and
including only those that i need (core, client, calendar) seemed to
fix the problem.
i remember reading somewhere about how long classpaths can cause this
problem.
is this going to be fixed? is the complexity of my app going to
i'm using eclipse 3.5.1, GPE 3.5 (1.2.0.v200912062003), GAE
1.3.1.v201002101412, GWT 2.0.3.v201002191036
datanucleusenhancer continuously runs over and over again
temporary workaround: turn off build automatically feature in eclipse
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