Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/6882#discussion_r33108891
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -2333,3 +2333,36 @@ private[spark] class RedirectThread(
}
}
}
+
+/**
+ * An [[OutputStream]] that will store the last 10 kilobytes (by default)
written to it
+ * in a circular buffer. The current contents of the buffer can be
accessed using
+ * the toString method.
+ */
+private[spark] class CircularBuffer(sizeInByte: Int = 10240) extends
java.io.OutputStream {
+ var pos: Int = 0
+ var buffer = new Array[Int](sizeInByte / 4)
--- End diff --
The `buffer` actually the Array of Int, not array of Byte, that's why I did
this.
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