SessionImpl.flush() has thrown a NullPointerException

We found this prefix in 3 webpages.
MapChildren (2)Typical messages (2)TraceDetailed Map
  1. java.lang.NullPointerException
    1.   at org.hibernate.envers.event.EnversPreCollectionRemoveEventListenerImpl.onPreRemoveCollection()
    2.   at org.hibernate.action.internal.CollectionRemoveAction.preRemove()
    3.   at org.hibernate.action.internal.CollectionRemoveAction.execute()
    4.   at org.hibernate.engine.spi.ActionQueue.execute()
    5.   at org.hibernate.engine.spi.ActionQueue.executeActions()
    6.   at org.hibernate.engine.spi.ActionQueue.executeActions()
    7.   at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions()
    8.   at org.hibernate.event.internal.DefaultFlushEventListener.onFlush()
    9.   at org.hibernate.internal.SessionImpl.flush()
  1. NullPointerException

    AbstractAuditableCrudDao.save()
    Crashes:2
    Projects:0
    Web Pages:2
    Error Reports:0
    First:10 months ago
    Last:7 months ago
    preview
  2. NullPointerException in PreCollectionRemove Listener

    First:6 years ago
    Last:2 years ago
    Author:Kevin Jordan
MessageNumber of crashes
null2
<No message>1
  1. java.lang.NullPointerException
    1.   at org.hibernate.envers.event.EnversPreCollectionRemoveEventListenerImpl.onPreRemoveCollection()
    2.   at org.hibernate.action.internal.CollectionRemoveAction.preRemove()
    3.   at org.hibernate.action.internal.CollectionRemoveAction.execute()
    4.   at org.hibernate.engine.spi.ActionQueue.execute()
    5.   at org.hibernate.engine.spi.ActionQueue.executeActions()
    6.   at org.hibernate.engine.spi.ActionQueue.executeActions()
    7.   at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions()
    8.   at org.hibernate.event.internal.DefaultFlushEventListener.onFlush()
    9.   at org.hibernate.internal.SessionImpl.flush()