fix #885 set elasticsearch.transport.sniff to false

src/main/resources/fess_config.properties

@@ -11,7 +11,7 @@ domain.title = Fess
 # Elasticsearch
 elasticsearch.cluster.name=elasticsearch
 elasticsearch.http.url=http://localhost:9201
-elasticsearch.transport.sniff=true
+elasticsearch.transport.sniff=false
 elasticsearch.transport.ping_timeout=1m
 elasticsearch.transport.nodes_sampler_interval=5s