Description
The following exception was seen:
java.lang.NullPointerException: null at java.util.HashSet.<init>(HashSet.java:116) at org.apache.jackrabbit.oak.plugins.observation.filter.ChangeSetFilterImpl.excludes(ChangeSetFilterImpl.java:90) at org.apache.jackrabbit.oak.plugins.observation.filter.FilterBuilder$2.excludes(FilterBuilder.java:438) at org.apache.jackrabbit.oak.jcr.observation.ChangeProcessor.evalPrefilter(ChangeProcessor.java:699) at org.apache.jackrabbit.oak.jcr.observation.ChangeProcessor.access$900(ChangeProcessor.java:84) at org.apache.jackrabbit.oak.jcr.observation.ChangeProcessor$6.excludes(ChangeProcessor.java:386) at org.apache.jackrabbit.oak.plugins.observation.FilteringObserver.contentChanged(FilteringObserver.java:95) at org.apache.jackrabbit.oak.spi.commit.CompositeObserver.contentChanged(CompositeObserver.java:53) at org.apache.jackrabbit.oak.spi.commit.ChangeDispatcher.contentChanged(ChangeDispatcher.java:79) at org.apache.jackrabbit.oak.segment.SegmentNodeStore.contentChanged(SegmentNodeStore.java:655) at org.apache.jackrabbit.oak.segment.SegmentNodeStore.access$1000(SegmentNodeStore.java:73) at org.apache.jackrabbit.oak.segment.SegmentNodeStore$Commit.setHead(SegmentNodeStore.java:536) at org.apache.jackrabbit.oak.segment.SegmentNodeStore$Commit.optimisticMerge(SegmentNodeStore.java:581) at org.apache.jackrabbit.oak.segment.SegmentNodeStore$Commit.execute(SegmentNodeStore.java:635) at org.apache.jackrabbit.oak.segment.SegmentNodeStore.merge(SegmentNodeStore.java:289) at org.apache.jackrabbit.oak.spi.state.ProxyNodeStore.merge(ProxyNodeStore.java:43) at org.apache.jackrabbit.oak.core.MutableRoot.commit(MutableRoot.java:249) at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.commit(SessionDelegate.java:347) at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.save(SessionDelegate.java:494) at org.apache.jackrabbit.oak.jcr.session.SessionImpl$8.performVoid(SessionImpl.java:419) at org.apache.jackrabbit.oak.jcr.delegate.SessionDelegate.performVoid(SessionDelegate.java:274) at org.apache.jackrabbit.oak.jcr.session.SessionImpl.save(SessionImpl.java:416)