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------------------ ???????? ------------------ ??????: "??????"<huyunchuan1...@foxmail.com>; ????????: 2020??6??11??(??????) ????4:56 ??????: "user-zh"<user-zh@flink.apache.org>; ????: ??????flink?????????????????? &gt;Hi &gt;???????????????????????? &gt;????????????????exctly-once???????? &gt;checkpoint???????????????????? &gt;????????kafka???????????????????????????????????? &gt;?????????????????? ------------------&nbsp;????????&nbsp;------------------ ??????:&nbsp;"Matt Wang"<wang...@163.com&gt;; ????????:&nbsp;2020??6??10??(??????) ????7:39 ??????:&nbsp;"user-zh@flink.apache.org"<user-zh@flink.apache.org&gt;; ????:&nbsp;Re:flink?????????????????? kafka ?? 0.11.0 ?????????????????? flink ???????????? EXACTLY-ONCE?????????? send ?? kafka???????????? commit ?????????????????????????????????????????????????? kafka ??????????????????????????????????????????????????????????&nbsp; isolation.level ???????????????????????? commit ???????? --- Best, Matt Wang On 06/10/2020 14:28??Yichao Yang<1048262...@qq.com&gt; wrote?? Hi sink&amp;nbsp; ??kafka????????kafka????????1.0??????kafka????????????????????????????????EXACTLY-ONCE???????????????????????????????? Best, Yichao Yang ------------------&amp;nbsp;????????&amp;nbsp;------------------ ??????:&amp;nbsp;"??????"<huyunchuan1...@foxmail.com&amp;gt;; ????????:&amp;nbsp;2020??6??10??(??????) ????2:25 ??????:&amp;nbsp;"user-zh"<user-zh@flink.apache.org&amp;gt;; ????:&amp;nbsp;flink?????????????????? &amp;amp;gt;Hi, &amp;amp;gt;??????flink??kafka??????????????????EXACTLY-ONCE?????? &amp;amp;gt;??debug??????????????????????invoke????????traction.producer.send()??????????????????????????????????precommit??commit???? &amp;amp;gt;??????????????????????????????