one of node in a cluster REST API for creating fts index fails while other node was successful with same curl

While testing against a 3 node cluster(data,index,query,search) of 5.5.0-2671 in docker container, one of the node response to REST API to create fts.

Request:
curl -X PUT -H "Authorization: Basic QWRtaW5pc3RyYXRvcjpwYXNzd29yZA==" "http://172.17.0.3:8094/api/index/ftsIndex2?sourceType=couchbase&indexType=fulltext-index&sourceName=default"

Response:

{"error":"rest_create_index: error creating index: ftsIndex2, err: manager_api: failed to connect to or retrieve information from source, sourceType: couchbase, sourceName: default, sourceUUID: , err: feed_cb: CouchbasePartitions no VBServerMap, server: http://127.0.0.1:8091, sourceName: default, err: \u003cnil\u003e","request":"","status":"fail"}

while same curl command to other nodes were successful