Adding #JobScope on an ItemReader makes it fail - spring-batch

Question

I have an issue with the #JobScope annotation.
I'm using spring-batch, with spring-boot, so no xml. I'm also using hibernate, and wish to use it in my readers.
Here is my item reader :
#Bean(name = "readerFactures")
public ItemReader<XFctFacture> readerFactures(SessionFactory sessionFactory) {
HibernateCursorItemReader itemReader = new HibernateCursorItemReader();
itemReader.setQueryString("from XFctFacture where typeFacture=1 and statut=1");
itemReader.setSessionFactory(sessionFactory);
return itemReader;
}
And everythink works fine, so far ... :)
But now I want to access to a parameter from my job, so I need to annotate my reader with the #JobScope.
So my new code is :
#Bean(name = "readerFactures")
#JobScope
public ItemReader<XFctFacture> readerFactures(SessionFactory sessionFactory) {
HibernateCursorItemReader itemReader = new HibernateCursorItemReader();
itemReader.setQueryString("from XFctFacture where typeFacture=1 and statut=1");
itemReader.setSessionFactory(sessionFactory);
return itemReader;
}
And with this, when I execute the job, I have the following exception
java.lang.NullPointerException: null
at org.springframework.batch.item.database.HibernateCursorItemReader.doRead(HibernateCursorItemReader.java:155) ~[spring-batch-infrastructure-3.0.4.RELEASE.jar:3.0.4.RELEASE]
at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.read(AbstractItemCountingItemStreamItemReader.java:88) ~[spring-batch-infrastructure-3.0.4.RELEASE.jar:3.0.4.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_71]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_71]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_71]
at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_71]
The cursor is null, it appears that my ItemReader had never been opened.
Any clues ?
Thanks