[GitHub] [spark] jiangxb1987 commented on a change in pull request #26239: [SPARK-29582][PYSPARK] Support `TaskContext.get()` in a barrier task from Python side

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jiangxb1987 commented on a change in pull request #26239: [SPARK-29582][PYSPARK] Support `TaskContext.get()` in a barrier task from Python side
URL: https://github.com/apache/spark/pull/26239#discussion_r340353839
 
 

 ##########
 File path: python/pyspark/taskcontext.py
 ##########
 @@ -162,7 +166,10 @@ def get(cls):
         running tasks.
 
         .. note:: Must be called on the worker, not the driver. Returns None if not initialized.
+            A RuntimeError will raise if it is not in a barrier stage.
         """
+        if not isinstance(cls._taskContext, BarrierTaskContext):
+            raise RuntimeError('''It is not in a barrier stage''')
 
 Review comment:
   This is not supported behavior, so please raise `Exception` instead of `RuntimeError`

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