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From GitBox <...@apache.org>
Subject [GitHub] [incubator-nemo] johnyangk commented on a change in pull request #222: [NEMO-350] Implement Off-heap SerializedMemoryStore & [NEMO-384] Implement DirectByteBufferInputStream for Off-heap SerializedMemoryStore
Date Tue, 25 Jun 2019 05:43:03 GMT
johnyangk commented on a change in pull request #222: [NEMO-350] Implement Off-heap SerializedMemoryStore
& [NEMO-384] Implement DirectByteBufferInputStream for Off-heap SerializedMemoryStore
URL: https://github.com/apache/incubator-nemo/pull/222#discussion_r297011787
 
 

 ##########
 File path: common/src/main/java/org/apache/nemo/common/DirectByteBufferOutputStream.java
 ##########
 @@ -140,38 +148,48 @@ public void write(final byte[] b, final int off, final int len) {
     final int arraySize = pageSize * (dataList.size() - 1) + lastBuf.position();
     final byte[] byteArray = new byte[arraySize];
     int start = 0;
-    int byteToWrite;
-
-    for (final ByteBuffer temp : dataList) {
-      // ByteBuffer has to be shifted to read mode by calling ByteBuffer.flip(),
-      // which sets limit to the current position and sets the position to 0.
-      // Note that capacity remains unchanged.
-      temp.flip();
-      byteToWrite = temp.remaining();
-      temp.get(byteArray, start, byteToWrite);
+
+    for (final ByteBuffer buffer : dataList) {
+      // We use duplicated buffer to read the data so that there is complicated
 
 Review comment:
   there is -> there is no ?

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