We run 4.5.1-2844 Community Edition (build-2844), and java-client-2.4.2.jar. At the moment we have a cluster of 2 servers on AWS.
1 of the servers suddenly became unstable and so far we are not able to understand what exactly happened with the instance itself. Nevertheless, CB clients failed in all other instances with the same exception:
Here is the log message in CB management console:
“Could not auto-failover node (‘email@example.com’). Number of nodes running data service is 2. You need at least 3 nodes.”
Does this mean that the minimum cluster configuration for the fail-over mechanism to properly work on both server AND client side is:
- 3 servers
- 1 replica