Probably a simple, easy question but...
I am getting this error message when datanucleus enhancement takes
place:
DataNucleus Enhancer completed with an error. Please review the
enhancer log for full details. Some classes may have been enhanced but
some caused errors
DataNucleus Enhancer completed and no classes were enhanced. Consult
the log for full details
It is not immediately apparent (to me anyway) where the log is. So,
can someone point me to the log itself?
The real problem I am having is with this code (using JPA):
@Entity(name = "IndirectContactEmail")
public class IndirectContactEmail
{
//key of the entity
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Key id;
//simple data members
private String first;
private String last;
private Email emailId;
//reference members
//unowned one-to-many, these are back links to the 'ones'
private Key indirectContactListKey;
private Key directContactKey;
public static List<IndirectContactEmail> get(List<Key>
keysOfIndirectContactEmails)
{
return null;
}
...
If I comment out the get() method everything is fine, with it in (even
completely empty) I get datanucleus enhancement errors:
Errors were encountered when loading the specified MetaData files and
classes. See the nested exceptions for details
org.datanucleus.exceptions.NucleusUserException: Errors were
encountered when loading the specified MetaData files and classes. See
the nested exceptions for details
at
org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:
426)
at
org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:
743)
at
org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:
545)
at
org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:
1252)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
57)
at com.google.appengine.tools.enhancer.Enhance.<init>(Enhance.java:
60)
at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
Caused by: java.lang.NullPointerException
at
org.datanucleus.jpa.metadata.JPAAnnotationReader.processMemberAnnotations(JPAAnnotationReader.java:
853)
at
org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:
159)
at
org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:
136)
at
org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:
2278)
at
org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:
385)
... 10 more
Nested Throwables StackTrace:
java.lang.NullPointerException
at
org.datanucleus.jpa.metadata.JPAAnnotationReader.processMemberAnnotations(JPAAnnotationReader.java:
853)
at
org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:
159)
at
org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:
136)
at
org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:
2278)
at
org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:
385)
at
org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:
743)
at
org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:
545)
at
org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:
1252)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
57)
at com.google.appengine.tools.enhancer.Enhance.<init>(Enhance.java:
60)
at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
DataNucleus Enhancer completed with an error. Please review the
enhancer log for full details. Some classes may have been enhanced but
some caused errors
DataNucleus Enhancer completed and no classes were enhanced. Consult
the log for full details
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