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https://issues.apache.org/jira/browse/SPARK-26068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16687497#comment-16687497
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Apache Spark commented on SPARK-26068:
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User 'linhong-intel' has created a pull request for this issue:
https://github.com/apache/spark/pull/23040
> ChunkedByteBufferInputStream is truncated by empty chunk
> --------------------------------------------------------
>
> Key: SPARK-26068
> URL: https://issues.apache.org/jira/browse/SPARK-26068
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: Liu, Linhong
> Priority: Major
>
> If ChunkedByteBuffer contains empty chunk in the middle of it, then the
> ChunkedByteBufferInputStream will be truncated. All data behind the empty
> chunk will not be read.
> The problematic code:
> {code:java}
> // ChunkedByteBuffer.scala
> // Assume chunks.next returns an empty chunk, then we will reach
> // else branch no matter chunks.hasNext = true or not. So some data is lost.
> override def read(dest: Array[Byte], offset: Int, length: Int): Int = {
> if (currentChunk != null && !currentChunk.hasRemaining && chunks.hasNext)
> {
> currentChunk = chunks.next()
> }
> if (currentChunk != null && currentChunk.hasRemaining) {
> val amountToGet = math.min(currentChunk.remaining(), length)
> currentChunk.get(dest, offset, amountToGet)
> amountToGet
> } else {
> close()
> -1
> }
> } {code}
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