Major Description
Currently, uncommitted keys in the OM open key table remain there until they are committed. A background service should periodically run to remove open keys and their associated blocks from memory if the key is past a certain age. This value will be configurable with the existing ozone.open.key.expire.threshold setting, which currently has a default value of 1 day. Any uncommitted key in the open key table older than this will be marked for deletion, and cleaned up with the existing OM key deleting service. A configurable value should limit the number of open keys that can be removed in one run of the service.
