I may be wrong but EMC Networker has this feature where you can tell a specific client to 'retry on failure' using a different value than under; Host Properties > Master Server > Global Parameters > Scheduled backup attempts (this is global)
This has become a requirement because the customer does not want VADP backups/clients to retry more than once. We have found that a job that retries and fails may not clear the snapshot and espcially very busy systems with quiescing turned on creates many deltas. When a backup does go through successfully it needs to consolodate all the deltas cause the VM to hang.