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部署Spark高可用集群不需要用到ZooKeeper服务
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Spark Master HA主从切换过程不会影响集群已有的作业运行
集群上的任务是有执行器来调度的
[音频]Halloween is 1.__________ annually. It is on the night of 31 October, when people once believed that 2.__________ could be seen. Now, in Britain and America, it is a time when children have 3.__________, dress up as witches, make 4.__________ out of pumpkins from which the inside has been 5.__________ , and play “trick or treat”.“Trick or treat” is a 6.__________ activity at Halloween. Children dress in costumes and 7.__________ houses.At each house they say “Trick or treat”. This means that they will play a“trick”, or 8.__________, on the people in the house unless they are given a “treat”,e.g. 9.__________ or money. Most people prefer to give treats rather than having tricks 10.__________on them.
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