Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/18351
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GitHub user fjh100456 opened a pull request:
https://github.com/apache/spark/pull/18351
[SPARK-21135][WEB UI] On history server pageï¼duration of incompleted
applications should be hidden instead of showing up as 0
## What changes were proposed in this pull request?
Hide d
