[System Test][ERRO] grpc_client: search err: rpc error: code = Unavailable

2021-03-10 17:59:30,928 - ftsindexmanager - INFO - --------------- Running query on bucket_bucket4_idx_uivgw-Overall-public_likes-free_parking field {'name': 'reviews.ratings.Overall', 'type': 'number', 'is_nested_object': True, 'field_code': 'Overall', 'queries': [{'query': 'reviews.ratings.Overall:3'}, {'min': 1, 'max': 1000, 'inclusive_min': False, 'inclusive_max': False, 'field': 'reviews.ratings.Overall'}], 'flex_queries': ['ANY v in reviews.ratings.Overall SATISFIES v = 3 END']} ---------------

2021-03-10 17:59:30,928 - ftsindexmanager - INFO - URI : /api/index/bucket_bucket4_idx_uivgw-Overall-public_likes-free_parking/query body : {'explain': True, 'query': {'min': 1, 'max': 1000, 'inclusive_min': False, 'inclusive_max': False, 'field': 'reviews.ratings.Overall'}, 'size': 17, 'from': 7788, 'ctl': {'timeout': 120000}}

2021-03-10 17:59:31,092 - ftsindexmanager - INFO - Index name: bucket_bucket4_idx_uivgw-Overall-public_likes-free_parking, Query: {'min': 1, 'max': 1000, 'inclusive_min': False, 'inclusive_max': False, 'field': 'reviews.ratings.Overall'}, Status: True, Response: 200, Total Hits: 3991, Result Status: {'total': 2, 'failed': 1, 'successful': 1, 'errors': {'bucket_bucket4_idx_uivgw-Overall-public_likes-free_parking_62aea4fa61346f72_b6d0c5f9': 'grpc_client: query got status code: 503, resp: (*bleve.SearchResult)(nil), err: rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: connection error: desc = "transport: Error while dialing dial tcp 172.23.106.134:19130: connect: connection refused"'}}

172.23.97.151 : fts

2021-03-10T17:59:31.029-08:00 [ERRO] grpc_client: search err: rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: connection error: desc = "transport: Error while dialing dial tcp 172.23.106.134:19130: connect: connection refused" -- cbft.(*GrpcClient).SearchRPC() at grpc_client.go:254

2021-03-10T17:59:31.037-08:00 [ERRO] grpc_client: search err: rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: connection error: desc = "transport: Error while dialing dial tcp 172.23.106.134:19130: connect: connection refused" -- cbft.(*GrpcClient).SearchRPC() at grpc_client.go:254 

 [2021-03-10T17:54:15-08:00, sequoiatools/couchbase-cli:7.0:8c597f] rebalance -c 172.23.97.74:8091 --server-remove 172.23.123.31 -u Administrator -p password

[2021-03-10T17:59:38-08:00, sequoiatools/cmd:44c5b7] 60