--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/util/concurrent/CompletionException.java	Tue Apr 09 17:27:47 2013 +0100
@@ -0,0 +1,90 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+package java.util.concurrent;
+
+/**
+ * Exception thrown when an error or other exception is encountered
+ * in the course of completing a result or task.
+ *
+ * @since 1.8
+ * @author Doug Lea
+ */
+public class CompletionException extends RuntimeException {
+    private static final long serialVersionUID = 7830266012832686185L;
+
+    /**
+     * Constructs a {@code CompletionException} with no detail message.
+     * The cause is not initialized, and may subsequently be
+     * initialized by a call to {@link #initCause(Throwable) initCause}.
+     */
+    protected CompletionException() { }
+
+    /**
+     * Constructs a {@code CompletionException} with the specified detail
+     * message. The cause is not initialized, and may subsequently be
+     * initialized by a call to {@link #initCause(Throwable) initCause}.
+     *
+     * @param message the detail message
+     */
+    protected CompletionException(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructs a {@code CompletionException} with the specified detail
+     * message and cause.
+     *
+     * @param  message the detail message
+     * @param  cause the cause (which is saved for later retrieval by the
+     *         {@link #getCause()} method)
+     */
+    public CompletionException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * Constructs a {@code CompletionException} with the specified cause.
+     * The detail message is set to {@code (cause == null ? null :
+     * cause.toString())} (which typically contains the class and
+     * detail message of {@code cause}).
+     *
+     * @param  cause the cause (which is saved for later retrieval by the
+     *         {@link #getCause()} method)
+     */
+    public CompletionException(Throwable cause) {
+        super(cause);
+    }
+}