Check the BP server status in bpserver.log file under the OEBPM_HOME/logs/Progress/BusinessManager location on all the cluster nodes.
If the BP server status is logged as "BP Server started in cluster mode successfully" on all the nodes, then it confirms that BP server cluster is set up correctly.
Check the BP server status in bpserver.log file under the OEBPM_HOME/logs/Progress/BusinessManager location on all the cluster nodes.