以下のエラーメッセージがアプリケーションサーバーに表示される理由を教えてください。Terracotta で EHCache をセットアップしようとしています。このメッセージが表示される理由を教えてください。
[DEBUG][08/05/12 13:50:19.648][CacheByAmitNode8081] Running mbean initializer task for ehcache hibernate...
[DEBUG][08/05/12 13:50:19.766][CacheByAmitNode8081] Successfully registered bean
[ERROR][08/05/12 13:50:19.805][CacheByAmitNode8081] Error locating Hibernate Session Factory
java.lang.NullPointerException
at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:36)
at sun.reflect.UnsafeQualifiedObjectFieldAccessorImpl.get(UnsafeQualifiedObjectFieldAccessorImpl.java:20)
at java.lang.reflect.Field.get(Field.java:358)
at org.hibernate.cache.ehcache.management.impl.ProviderMBeanRegistrationHelper$RegisterMBeansTask.locateSessionFactory(ProviderMBeanRegistrationHelper.java:152)
at org.hibernate.cache.ehcache.management.impl.ProviderMBeanRegistrationHelper$RegisterMBeansTask.run(ProviderMBeanRegistrationHelper.java:117)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
[DEBUG][08/05/12 13:50:19.815][CacheByAmitNode8081] SessionFactory is probably still being initialized... waiting for it to complete before enabling hibernate statistics monitoring via JMX