Sample Rejected Status

Attribute	Attribute Meaning
total_count	Total cumulative count of samples rejected by the DataReader.
total_count_change	The incremental number of samples rejected since the last time the listener was called or the status was read.
last_reason	Reason for rejecting the last sample rejected. If no samples have been rejected, the reason is the special value NOT_REJECTED.
last_instance_handle	Handle to the instance being updated by the last sample that was rejected.

A received sample was rejected. This can happen when the ResourceLimits Qos is active and the History determined by History QoS of the DataReader is full.