NPE at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizer.toLegacySimple

Encountering NPE when calling getOriginalOperationalSubtree() in a registered org.opendaylight.controller.sal.binding.api.data.DataChangeListener.

Expected: return null.

Sample code:

registration:
dataBrokerService.registerDataChangeListener(reportedLspId, new DataChangeListener());

DataChangeListener:
public void onDataChanged(DataChangeEvent<InstanceIdentifier<?>, DataObject> change)

{ originalLsp = (ReportedLsp) change.getOriginalOperationalSubtree(); updatedLsp = (ReportedLsp) change.getUpdatedOperationalSubtree(); }

Full stack trace:

java.lang.NullPointerException: null
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizer.toLegacySimple(DataNormalizer.java:159) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizer.toLegacy(DataNormalizer.java:154) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.binding.impl.BindingToNormalizedNodeCodec.toBinding(BindingToNormalizedNodeCodec.java:106) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedDataBroker.toBindingData(AbstractForwardedDataBroker.java:128) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedDataBroker$TranslatedDataChangeEvent.getOriginalSubtree(AbstractForwardedDataBroker.java:210) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedDataBroker$TranslatedDataChangeEvent.getOriginalSubtree(AbstractForwardedDataBroker.java:155) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.binding.impl.LegacyDataChangeEvent$OperationalChangeEvent.getOriginalOperationalSubtree(LegacyDataChangeEvent.java:118) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.binding.impl.LegacyDataChangeEvent$OperationalChangeEvent.getOriginalOperationalSubtree(LegacyDataChangeEvent.java:96) ~[bundlefile:na]