maropu commented on a change in pull request #24187: [SPARK-27256][CORE][SQL]If 
the configuration is used to set the number of bytes, we'd better use 
`bytesConf`'.
URL: https://github.com/apache/spark/pull/24187#discussion_r268591065
 
 

 ##########
 File path: 
core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
 ##########
 @@ -144,7 +144,7 @@ public UnsafeShuffleWriter(
     this.sparkConf = sparkConf;
     this.transferToEnabled = sparkConf.getBoolean("spark.file.transferTo", 
true);
     this.initialSortBufferSize =
-      (int) sparkConf.get(package$.MODULE$.SHUFFLE_SORT_INIT_BUFFER_SIZE());
+      (int) (long) 
sparkConf.get(package$.MODULE$.SHUFFLE_SORT_INIT_BUFFER_SIZE());
 
 Review comment:
   what if we dont' have this long cast?

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