shaohk commented on issue #25494: [SPARK-28655] [patch] Support to cut the event log, and solve the history server was too slow when event log is too large. URL: https://github.com/apache/spark/pull/25494#issuecomment-522834461 thank u very much > Hi, @shaohk . Thank you for making PRs again. But, SPARK-28655 is an improvement PR and Apache Spark don't allow new feature backporting. So, an improvement PR to non-`master` branch is invalid from the beginning. Like your previous PR, I need to close this PR, #25387 . > > You can open this to `master` branch. BTW, the new PR description should answer @srowen 's question when you reopen this to `master`. > > > This isn't opened vs master. Also, there are already several properties that let you limit how much history is retained. Why is this needed? thank u very much
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