第7课：Spark Streaming源码解读之JobScheduler内幕实现和深度思考 /* 王家林老师授课http://weibo.com/ilovepains 每天晚上20：00YY频道现场授课频道68917580*/ 1,JobScheduler内幕实现 2，JobScheduler深度思考
JobScheduler是整个spark streaming调度的核心，相当于DAGScheduler
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