Install couchbase server 1.8.0r-55 with hotfix-MB4738 on 4 nodes
Create a cluster of 4 nodes.
Load items to cluster and failover and rebalance one by one (failover tests)
Check UI and see no graph running.
Check log and see:
Port server memcached on node 'email@example.com' exited with status 5. Restarting. Messages: Extension support isn't implemented in this version of bucket_engine
Vbucket <682> is going dead.
EOL on stdin. Exiting