Can Kibana connect to data sources other than flexible search and data visualization in other data sources? In particular, I want to connect Kibana with Hive.
No, you cannot directly connect Kibana, but you can connect Elasticsearch to hadoop. using es-hadoop see https://www.elastic.co/products/hadoop
Similarly, you can connect other data sources to elasticsearch, such as Logstash, es-hadoop or third-party technologies such as Apache Flume, Fluentd and many others. see https://www.elastic.co/products/kibana