clay4444 opened a new pull request #1577: refactor zk tree cache
URL: https://github.com/apache/incubator-dolphinscheduler/pull/1577
 
 
   #752  What is the purpose of the pull request
   
   in ZookeeperCachedOperator class, the current implementation is to use a map 
to store all the treecache, which may be problematic. The correct method is to 
use a treecache to monitor
   zk /${~ scheduler}  All events under the root path, which is responsible for 
forwarding to the subclass, and the subclass uses the path to get the events it 
cares about
   

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