Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/6882#discussion_r32858070
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -2333,3 +2333,34 @@ private[spark] class RedirectThread(
}
}
}
+
+/**
+ * Circular buffer, which consume all of the data write to it.
--- End diff --
An [[OutputStream]] that will store the last 10 kilobytes written to it in
a circular buffer. The current contents of the buffer can be accessed using
the `toString` method.
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