GRID_NOT_OFFHEAP_ELIGIBLE_CWOBJ0069=CWOBJ0069W: OffHeap is enabled but one of the BackingMaps for ObjectGrid "{0}" does not have a CopyMode of COPY_TO_BYTES or COPY_TO_BYTES_RAW. All BackingMaps for an ObjectGrid must be configured with either COPY_TO_BYTES or COPY_TO_BYTES_RAW to use OffHeap.
Explanation
All BackingMaps for an ObjectGrid must be configured with either COPY_TO_BYTES or COPY_TO_BYTES_RAW to use OffHeap.One of the maps in the MapSet has a copy mode other than COPY_TO_BYTES or COPY_TO_BYTES_RAW
User response
Configure all BackingMaps with CopyModes of either: COPY_TO_BYTES or COPY_TO_BYTES_RAW