AngersZhuuuu commented on issue #26378: [SPARK-29724][SPARK-29726][WEBUI][SQL] Support JDBC/ODBC tab for HistoryServer WebUI URL: https://github.com/apache/spark/pull/26378#issuecomment-550297940 > Thanks @juliuszsompolski for the comment. Yes, I followed similar to the other existing listeners here. Only difference is that, posting the events to the listener bus from the listener itself, using the `SparkContext` that passed from the `HiveThriftServer2`. Also, the frequency of `Thriftserver events` is relatively very low compared to the `TaskEvents` or `JobEvents`. But, without that the events we can't populate the UI from HistoryServer. Agree to this, to be honest, we don't want to lose event related to UI, especial some event about progress， status. Always when event is too busy, server's status is bad, and we need to check job's status to help us find out problem. losing these important events is really bad.
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