import java.util.concurrent.atomic.AtomicReference;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
-import org.opendaylight.mdsal.common.api.TransactionChainClosedException;
+
+import org.opendaylight.mdsal.binding.api.TransactionChainClosedException;
import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
import org.opendaylight.openflowplugin.api.ConnectionException;
import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext;