Trigger  | Description  | 
Force Sync  | The user requested to synchronize the VPG, as described in Forcing the Synchronization of a VPG.  | 
Network Congestion  | The network bandwidth is not wide enough to handle all the data, causing some of the data to be backed up.  | 
Protected Storage Error  | An I/O error occurred to a protected virtual machine, after the data was sent to the recovery side.  | 
Protected VRA Congestion  | The host where the VRA is installed is highly loaded: many updates are made to the protected machines at the same time, causing a time lapse before the updates are passed to the recovery site.  | 
Recovery or Journal Storage Error  | There was an I/O error either to the recovery storage or journal, for example if the journal was full and the size was increased. Once the problem is resolved a synchronization is required.  | 
Recovery Storage Congestion  | The recovery datastore is being written to a lot, causing a delay for some of the data passed from the protected site to be written to disk.  | 
Recovery VRA Communication Problem  | A network error, such as the network being down for a period, requires a synchronization of the VPG between the two sites, for example a Bitmap Sync.  | 
VPG Configuration Changed  | The configuration of the VPG changed resulting in a synchronization being required. For example, the size of the journal was changed.  |