Github user zsxwing commented on the pull request:
https://github.com/apache/spark/pull/10069#issuecomment-161120459
There is a bug in
https://github.com/apache/spark/blob/9bf2120672ae0f620a217ccd96bef189ab75e0d6/core/src/main/scala/org/apache/spark/network/netty/NettyBlockTransferService.scala#L126
It should not use `array` directly, since ByteBuffer doesn't guarantee all
bytes in `array` are valid.
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