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Subject [GitHub] [incubator-nemo] johnyangk commented on a change in pull request #223: [NEMO-388] Off-heap memory management (reuse ByteBuffer)
Date Tue, 23 Jul 2019 07:29:37 GMT
johnyangk commented on a change in pull request #223: [NEMO-388] Off-heap memory management
(reuse ByteBuffer)

 File path: runtime/executor/src/main/java/org/apache/nemo/runtime/executor/data/
 @@ -0,0 +1,42 @@
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+ * An exception to be thrown when a memory allocation operation is not successful.
+ */
+public class MemoryAllocationException extends Exception {
 Review comment:
   It appears that this class is never instantiated and actually thrown. It'd be better to
remove this class altogether to reduce confusion.
   If this class is used, then it'd be good to provide a message that describes 'why' the
exception occurred. For example, is this exception expected to be thrown when the sum of the
total memory allocated exceeds a certain threshold?

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