import java.util.Date;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;
-import javax.annotation.concurrent.GuardedBy;
+import org.checkerframework.checker.lock.qual.GuardedBy;
import org.eclipse.jdt.annotation.Nullable;
import org.opendaylight.controller.cluster.datastore.Shard;
import org.opendaylight.controller.cluster.raft.base.messages.InitiateCaptureSnapshot;