Depending on your local configuration, some components of Couchbase Server may have additional system requirements.
The Analytics service requires a Java Runtime Environment to be installed. The Oracle JRE version 8 is installed by default when you install Couchbase Server — you do not need to install any additional prerequisites to use the Analytics service. However, if necessary, you can specify an alternative JRE for the Analytics service when you initialize a cluster. If you plan to use an alternative JRE for the Analytics service, note that the following versions are supported.
Version 8, Update 181 or later