[CX] NC crash due to NPE in CouchbaseConnector.close() on stop during bootstrap

2020-11-17T20:52:39.228-08:00 WARN CBAS.active.ActiveManager [Executor-125:fd8430da8d59f94ba0c7afb82467f288] Failed to stop runtime: (my_bucket.my_scope.Local.beer-sample(CouchbaseMetadataExtension))[11]:BucketOperatorDescriptor

java.lang.NullPointerException: null

	at com.couchbase.analytics.adapter.CouchbaseConnector.stop(CouchbaseConnector.java:712) ~[cbas-connector.jar:7.0.0-0000]

	at org.apache.asterix.external.dataflow.FeedRecordDataFlowController.stop(FeedRecordDataFlowController.java:249) ~[asterix-external-data.jar:7.0.0-0000]

	at org.apache.asterix.external.dataset.adapter.FeedAdapter.stop(FeedAdapter.java:49) ~[asterix-external-data.jar:7.0.0-0000]

	at com.couchbase.analytics.runtime.BucketOperatorNodePushable.abort(BucketOperatorNodePushable.java:88) ~[cbas-connector.jar:7.0.0-0000]

	at org.apache.asterix.active.ActiveSourceOperatorNodePushable.stop(ActiveSourceOperatorNodePushable.java:69) ~[asterix-active.jar:7.0.0-0000]

	at org.apache.asterix.active.ActiveManager.stopIfRunning(ActiveManager.java:192) ~[asterix-active.jar:7.0.0-0000]

	at org.apache.asterix.active.ActiveManager.lambda$stopRuntime$3(ActiveManager.java:180) ~[asterix-active.jar:7.0.0-0000]

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]

	at java.lang.Thread.run(Thread.java:834) [?:?]