HeartSaVioR edited a comment on issue #25705: [SPARK-29003][CORE] Fix deadlock in startup of Spark History Server URL: https://github.com/apache/spark/pull/25705#issuecomment-530194631 Hmm... yes I agree it might be weird if we don't follow start/stop pattern. What I'm concerned about is the change would also make tests skip initializing. If the test calls `updateAndCheck()`, it misses initialization. It doesn't let existing tests be broken, but brings some unintentional side-effect. I think we even need to call `initialize` instead if it's weird for us to call `start` without calling `stop`, but given tests are passing, let's hear more voice on committers.
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