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Subject [GitHub] [incubator-nemo] hy00nc commented on a change in pull request #223: [NEMO-388] Off-heap memory management (reuse ByteBuffer)
Date Wed, 24 Jul 2019 07:21:24 GMT
hy00nc commented on a change in pull request #223: [NEMO-388] Off-heap memory management (reuse
ByteBuffer)
URL: https://github.com/apache/incubator-nemo/pull/223#discussion_r306661001
 
 

 ##########
 File path: runtime/executor/src/main/java/org/apache/nemo/runtime/executor/data/MemoryAllocationException.java
 ##########
 @@ -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
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.nemo.runtime.executor.data;
+
+/**
+ * An exception to be thrown when a memory allocation operation is not successful.
+ */
+public class MemoryAllocationException extends Exception {
 
 Review comment:
   I realized I missed this part. It is supposed to be thrown while allocating direct `ByteBuffer`,
because it will throw an out-of-memory error if the system lacks memory to be allocated. I
will add this part so that this exception is used. 

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