--- /dev/null
+/*
+ * Copyright (c) 2017 Inocybe Technologies and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.cluster.messaging;
+
+import org.opendaylight.yangtools.concepts.Identifier;
+
+/**
+ * A MessageSliceException indicating the message assembler has already been closed.
+ *
+ * @author Thomas Pantelis
+ */
+public class AssemblerClosedException extends MessageSliceException {
+ private static final long serialVersionUID = 1L;
+
+ /**
+ * Constructs an instance.
+ *
+ * @param identifier the identifier whose state was closed
+ */
+ public AssemblerClosedException(final Identifier identifier) {
+ super(String.format("Message assembler for %s has already been closed", identifier), false);
+ }
+}