Github user tsudukim commented on the pull request:
https://github.com/apache/spark/pull/1516#issuecomment-49909562
You can see the screenshot which the original code generated in the JIRA.
https://issues.apache.org/jira/browse/SPARK-2567
This screenshot was taken after the job completed but one stage remained as
Active Stage forever.
It shouldn't be displayed in this web ui at all because the corresponding
new TaskSet is not submitted and even stage.newAttemptId() isn't called.
Sometimes this ghost stage appears when stage is re-submitted so this PR
modified to prevent web ui from showing it.
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