getIndexStatus failed: {error,timeout}

Couchbase Server
1

I found in my error.log this error :
[ns_server:error,2017-01-05T12:31:22.322+01:00,ns_1@couchbase01xxxxx:index_status_keeper_worker<0.477.0>:index_rest:get_json:45]Request to http://127.0.0.1:9102/getIndexStatus failed: {error,timeout}

Is normal ?