[PassivateTask] null: java.lang.NullPointerException

15:10:57,385 INFO  [org.jboss.as.ejb3.cache.spi.impl.PassivateTask] (pool-17-thread-1) null: java.lang.NullPointerException
        at org.jboss.as.ejb3.component.stateful.StatefulSessionComponent.prePassivate(StatefulSessionComponent.java:157) [jboss-as-ejb3-8.0.0.Alpha1-SNAPSHOT.jar:8.0.0.Alpha1-SNAPSHOT]
        at org.jboss.as.ejb3.component.stateful.StatefulSessionComponent.prePassivate(StatefulSessionComponent.java:73) [jboss-as-ejb3-8.0.0.Alpha1-SNAPSHOT.jar:8.0.0.Alpha1-SNAPSHOT]
        at org.jboss.as.ejb3.cache.impl.backing.SerializationGroupMemberContainer.prePassivate(SerializationGroupMemberContainer.java:165) [jboss-as-ejb3-8.0.0.Alpha1-SNAPSHOT.jar:8.0.0.Alpha1-SNAPSHOT]
        at org.jboss.as.ejb3.cache.impl.backing.SerializationGroupMemberContainer.prePassivate(SerializationGroupMemberContainer.java:51) [jboss-as-ejb3-8.0.0.Alpha1-SNAPSHOT.jar:8.0.0.Alpha1-SNAPSHOT]
        at org.jboss.as.ejb3.cache.impl.backing.PassivatingBackingCacheImpl.passivate(PassivatingBackingCacheImpl.java:189) [jboss-as-ejb3-8.0.0.Alpha1-SNAPSHOT.jar:8.0.0.Alpha1-SNAPSHOT]
        at org.jboss.as.ejb3.cache.impl.backing.PassivatingBackingCacheImpl.passivate(PassivatingBackingCacheImpl.java:60) [jboss-as-ejb3-8.0.0.Alpha1-SNAPSHOT.jar:8.0.0.Alpha1-SNAPSHOT]
        at org.jboss.as.ejb3.cache.spi.impl.PassivateTask.run(PassivateTask.java:46) [jboss-as-ejb3-8.0.0.Alpha1-SNAPSHOT.jar:8.0.0.Alpha1-SNAPSHOT]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [rt.jar:1.7.0_17]
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) [rt.jar:1.7.0_17]
        at java.util.concurrent.FutureTask.run(FutureTask.java:166) [rt.jar:1.7.0_17]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178) [rt.jar:1.7.0_17]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292) [rt.jar:1.7.0_17]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_17]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_17]
        at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_17]