The RestartLimit attribute defines whether VCS attempts to restart a failed resource before it informs the engine of the fault.

If the RestartLimit attribute is set to a non-zero value, the agent attempts to restart the resource before it declares the resource as Faulted. When the agent framework restarts a failed resource, it first calls the Clean function and then the Online function. However, if the ManageFaults attribute is set to NONE, the agent does not call the Clean function and does not retry the Online function. If you configure the ManageFaults attribute at the resource level, it supersedes the values that are configured at the service group level.