Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/19582
For context:
* Project link: https://issues.apache.org/jira/browse/SPARK-18085
* Upcoming PRs that build on this code:
https://github.com/vanzin/spark/pulls
A special note about this PR: this marks a sort of "point of no return" for
the UI. Once this is in, the UI will be in a weird franken-state until
https://github.com/vanzin/spark/pull/51 / SPARK-20653 is committed. Until then,
there will be duplicate listeners collecting data, which can slow things down a
bit in the event bus, and also increase memory usage.
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