[jira] [Created] (SPARK-26068) ChunkedByteBufferInputStream is truncated by empty chunk

["Liu, Linhong (JIRA)" <ji...@apache.org>]

Liu, Linhong created SPARK-26068:
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             Summary: 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


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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