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spark core 日誌遮蔽

(1)切換logback日誌:

  刪除slf4j-log4j相關jar包,增加ch.qos.logback.core_1.0.0.jar及ch.qos.logback.classic_1.0.0.jar

(2)配置logback.xml並儲存至conf目錄:

     <logger name="org.apache" level="WARN"/>
    <logger name="org.spark_project" level="WARN"/>