Below errors were seen in the logs and the VMWare agent did not collect any data
2016-08-25 14:01:25.966 ECHO <VMwarePerformance/5.6.10/VMwarePerformance/XXXXXXXXXX-agent> ERROR [Quartz[0]-4] com.quest.vmware.agent.performance.view.PerformancePropertyFilterSpecFactory - Unable to generate a PPFS Factory Instance for VC Version
2016-08-25 14:01:25.982 ECHO <VMwarePerformance/5.6.10/VMwarePerformance/XXXXXXXXXX-agent> VERBOSE [Quartz[0]-4] com.quest.vmware.api.util.AgentMessage - Loaded 19 properties for Agent Message Text Values
2016-08-25 14:01:25.982 ECHO <VMwarePerformance/5.6.10/VMwarePerformance/XXXXXXXXXX-agent> FATAL [Quartz[0]-4] com.quest.agent.esx.task.PerformanceTask - An unexpected issue occurred during data collection from the VirtualCenter. Please review your environment to ensure that data collection has resumed in a normal fashion. If there is a persistent problem or this message recurs regularly please contact Quest Support.
2016-08-25 14:01:25.982 ECHO <VMwarePerformance/5.6.10/VMwarePerformance/XXXXXXXXXX-agent> ERROR [Quartz[0]-4] com.quest.agent.esx.task.PerformanceTask - Error during execution: ERROR: Unrecognized Version
java.lang.IllegalArgumentException: Unrecognized Version