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java.lang.NullPointerException at com.hazelcast.hibernate.HazelcastTimestamper.nextTimestamp(HazelcastTimestamper.java:38) at com.hazelcast.hibernate.AbstractHazelcastCacheRegionFactory.nextTimestamp(AbstractHazelcastCacheRegionFactory.java:81) at org.hibernate.internal.SessionFactoryImpl$SessionBuilderImpl.openSession(SessionFactoryImpl.java:1589) at org.hibernate.internal.SessionFactoryImpl.openSession(SessionFactoryImpl.java:999)