Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/13351#discussion_r65072973 --- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala --- @@ -2345,28 +2345,23 @@ private[spark] class RedirectThread( */ private[spark] class CircularBuffer(sizeInBytes: Int = 10240) extends java.io.OutputStream { var pos: Int = 0 - var buffer = new Array[Int](sizeInBytes) + var isBufferFull = false + var buffer = new Array[Byte](sizeInBytes) - def write(i: Int): Unit = { - buffer(pos) = i + def write(input: Int): Unit = { + buffer(pos) = input.toByte pos = (pos + 1) % buffer.length + isBufferFull = isBufferFull || (pos == 0) } override def toString: String = { - val (end, start) = buffer.splitAt(pos) - val input = new java.io.InputStream { - val iterator = (start ++ end).iterator + val end = new String(buffer, 0, pos, StandardCharsets.UTF_8) --- End diff -- There could be a multibyte char encoding broken across end and start. I think we have to unfortunately build the whole byte array to convert and then read it as a string.
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