Autorelease shows a NPE in DOMRpcRouter, as evidenced in https://logs.opendaylight.org/releng/jenkins092/autorelease-release-carbon/135/archives/l2switch/features/target/surefire-reports/org.opendaylight.odlparent.featuretest.SingleFeatureTest-output.txt.gz:

Exception in thread "DOMRpcRouter-listener-0" java.lang.NullPointerException
at com.google.common.collect.Maps.doDifference(Maps.java:428)
at com.google.common.collect.Maps.difference(Maps.java:419)
at com.google.common.collect.Maps.difference(Maps.java:387)
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMRpcRouter$Registration.addRpc(DOMRpcRouter.java:185)
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMRpcRouter.notifyAdded(DOMRpcRouter.java:109)
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMRpcRouter.lambda$registerRpcImplementation$1(DOMRpcRouter.java:87)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

This should not be happening, as at that point the initial table should have been seeded.