Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/22240#discussion_r212863444
--- Diff: core/src/main/scala/org/apache/spark/BarrierTaskContext.scala ---
@@ -68,7 +74,7 @@ class BarrierTaskContext(
*
* CAUTION! In a barrier stage, each task must have the same number of
barrier() calls, in all
* possible code branches. Otherwise, you may get the job hanging or a
SparkException after
- * timeout. Some examples of misuses listed below:
+ * timeout. Some examples of '''misuses''' listed below:
--- End diff --
use bold font to make sure users don't misread
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