Josh Rosen created SPARK-17486:
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             Summary: Remove unused TaskMetricsUIData.updatedBlockStatuses field
                 Key: SPARK-17486
                 URL: https://issues.apache.org/jira/browse/SPARK-17486
             Project: Spark
          Issue Type: Improvement
          Components: Web UI
            Reporter: Josh Rosen
            Assignee: Josh Rosen


The {{TaskMetricsUIData.updatedBlockStatuses}} field is assigned to but never 
read, increasing the memory consumption of the web UI. We should remove this 
field.



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