[System Test]: Failed to get bucket insights

[2018-09-02T22:15:03-07:00, sequoiatools/couchbase-cli:a1f974] rebalance -c 172.23.96.206:8091 --server-remove 172.23.96.214 -u Administrator -p password

2018-09-03T03:30:41.030-07:00 INFO CBAS.server.QueryServiceServlet [HighPriorityHttpExecutor(port:8095)-13] handleRequest: {"host":"172.23.96.14:8091","path":"/query/service","statement":"SELECT DataverseName, DataverseName || '.' || DatasetName AS fullName, DatasetName AS id, TRUE AS isDataset, BucketName AS bucketName, `Filter` AS `filter`, LinkName, ( SELECT idx.IndexName, idx.SearchKey, idx.SearchKeyType FROM Metadata.`Index` AS idx WHERE idx.IsPrimary = false AND idx.DatasetName = ds.DatasetName AND idx.DataverseName = ds.DataverseName) AS indexes FROM Metadata.`Dataset` AS ds WHERE BucketName IS NOT missing UNION ALL SELECT dv.DataverseName, TRUE AS isDataverse, ( SELECT l.Name FROM Metadata.`Link` AS l WHERE l.DataverseName = dv.DataverseName) AS links FROM Metadata.`Dataverse` AS dv WHERE dv.DataverseName != 'Metadata' UNION ALL SELECT DataverseName, Name, TRUE as isLink FROM Metadata.`Link`;","pretty":false,"mode":null,"clientContextID":null,"format":null,"timeout":null,"maxResultReads":null,"planFormat":null,"expressionTree":false,"rewrittenExpressionTree":false,"logicalPlan":false,"optimizedLogicalPlan":false,"job":false,"signature":true,"multiStatement":true}

2018-09-03T03:30:41.037-07:00 INFO CBAS.messaging.NCMessageBroker [Worker:d84b0b2fb2e781b19c3267fd8da6bcd5] Received message: ExecuteStatementResponseMessage(id=123587): 0 characters

2018-09-03T03:30:41.037-07:00 WARN CBAS.server.QueryServiceServlet [HighPriorityHttpExecutor(port:8095)-13] handleException: ASX0032: Cannot execute request, cluster is UNUSABLE: {"host":"172.23.96.14:8091","path":"/query/service","statement":"SELECT DataverseName, DataverseName || '.' || DatasetName AS fullName, DatasetName AS id, TRUE AS isDataset, BucketName AS bucketName, `Filter` AS `filter`, LinkName, ( SELECT idx.IndexName, idx.SearchKey, idx.SearchKeyType FROM Metadata.`Index` AS idx WHERE idx.IsPrimary = false AND idx.DatasetName = ds.DatasetName AND idx.DataverseName = ds.DataverseName) AS indexes FROM Metadata.`Dataset` AS ds WHERE BucketName IS NOT missing UNION ALL SELECT dv.DataverseName, TRUE AS isDataverse, ( SELECT l.Name FROM Metadata.`Link` AS l WHERE l.DataverseName = dv.DataverseName) AS links FROM Metadata.`Dataverse` AS dv WHERE dv.DataverseName != 'Metadata' UNION ALL SELECT DataverseName, Name, TRUE as isLink FROM Metadata.`Link`;","pretty":false,"mode":null,"clientContextID":"ae485c99-f1e1-4ed7-857b-f2f30a351128","format":null,"timeout":null,"maxResultReads":null,"planFormat":null,"expressionTree":false,"rewrittenExpressionTree":false,"logicalPlan":false,"optimizedLogicalPlan":false,"job":false,"signature":true,"multiStatement":false}

2018-09-03T03:30:45.940-07:00 INFO CBAS.messaging.NCMessageBroker [Worker:d84b0b2fb2e781b19c3267fd8da6bcd5] Received message: com.couchbase.analytics.messaging.ShadowingStatsResponse@4bc5a816

2018-09-03T03:30:50.944-07:00 INFO CBAS.messaging.NCMessageBroker [Worker:d84b0b2fb2e781b19c3267fd8da6bcd5] Received message: com.couchbase.analytics.messaging.ShadowingStatsResponse@59158f1

2018-09-03T03:30:55.942-07:00 INFO CBAS.messaging.NCMessageBroker [Worker:d84b0b2fb2e781b19c3267fd8da6bcd5] Received message: com.couchbase.analytics.messaging.ShadowingStatsResponse@6cbac583