Sync gateway fails to start with multiple couchbase servers on 6.0.0-1643

Sync Gateway version

SG version - 2.1.0-121

Couchbase server

CBS - 6.0.0-1643

Operating system

Centos for CBS and Sync gateway

Sync gateway Config file

 

{{ "interface":":4984",
"adminInterface": "0.0.0.0:4985",
"maxIncomingConnections": 0,
"maxCouchbaseConnections": 16,
"maxFileDescriptors": 90000,
"slowServerCallWarningThreshold": 500,
"compressResponses": false,

"logging": {"debug":

{"enabled": true}

},
"databases":{
"db":

{ "import_docs": "continuous", "enable_shared_bucket_access": true, "num_index_replicas": 0, "server":"http://192.168.33.10,192.168.33.11,192.168.33.12:8091", "bucket":"data-bucket", "username":"data-bucket", "password": "password" }

}
}}}

Sync gateway Log output

https://gist.github.com/sridevi-15/f64ac3ba064e887188938478142f7265

Steps to reproduce

1. Set up 3 couchbase servers in the CBS cluster.
2. Start sync-gateway with above config by providing 3 cbs urls on the config

Expected behavior

It should start successfully

Actual behavior

Sync gateway failed to start

Note : It passed with previous version 5.5.2-3733 and also 6.0.0-1592. It passed in DI mode(sg accel) with CBS 6.0.0-1643.
It passed with use views in CC mode with CBS 6.0.0-1643

It failed only with GSI