rebalance-without-disconnect fails with NPE, CancellationException

Observed a few times, but here is latest occurrence:

2017-08-11T12:20:41.058-07:00 WARN CBAS.active.ActiveEntityEventsListener [Executor-4:ClusterController] First attempt to resume Default.beersample(CouchbaseMetadataExtension) Failed

Caused by: java.lang.NullPointerException at com.couchbase.analytics.lang.ConnectBucketStatement.doConnect(ConnectBucketStatement.java:424) ~[cbas-connector-1.0.0-SNAPSHOT.jar:1.0.0-SNAPSHOT] ... 9 more

it seems the fact that the resume fails isn't tested, as the test proceeds normally, however later once the disconnect is attempted, it fails as well:

...

2017-08-11T12:20:42.685-07:00 WARN CBAS.lang.DisconnectBucketStatement [Executor-5:ClusterController] Failed disconnecting a bucket
org.apache.hyracks.api.exceptions.HyracksDataException: java.util.concurrent.CancellationException