Debugging Elasticsearch
Logs
Logs are written to folder /var/log/elasticsearch.
Status Information
Elasticsearch status can be retrieved with any browser.
Check if node is up and running by using node base URL
Check cluster health
List nodes
Get detailed node information
http://10.1.252.52:9200/_nodes?pretty
List shards
Every Elasticsearch index is split into shards (default = 5 shards) and redundantly stored in primary (p) and replica (r) shards.