Elasticsearch 5.x Cookbook - Third Edition

Creating an HTTP Elasticsearch client

With Elasticsearch 5.x, the Elasticsearch team has provided a custom low-level HTTP client to communicate with Elasticsearch. Its main features are as follows:

• Minimal dependencies
• Load balancing across all available nodes
• Failover in the case of node failures and upon specific response codes
• Failed connection penalization (whether a failed node is retried depends on how many consecutive times it failed; the more failed attempts, the longer the client will wait before trying that same node again)
• Persistent connections
• Trace logging of requests and responses
• Optional automatic discovery of cluster nodes

Getting ready

You need an up-and-running Elasticsearch installation as we described in the Downloading and installing ...