spark累加器类型

Spark内置了Long和Double类型的累加器。 经过一系列的transform操作构成了DAG，需要通过一个action操作来触发累加器的计算。在action操作之前调用累加器的value方法来查看其数值是没有任何变化的。 累加器可以用于在过滤RDD时进行计数，并最后计算剩下整数的和。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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- *3* [Spark2.10中使用累加器、注意点以及实现自定义累加器](https://blog.csdn.net/u013468917/article/details/70617085)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 33.333333333333336%"]
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