Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/19160#discussion_r139860969
--- Diff:
core/src/main/scala/org/apache/spark/network/netty/NettyBlockTransferService.scala
---
@@ -18,11 +18,14 @@
package org.apache.spark.network.netty
import java.nio.ByteBuffer
+import java.util
--- End diff --
OK, I will change it.
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