1.11????????????????????Cannot have more than one execute() or executeAsyc() call in a single environment

Tue, 18 Aug 2020 10:38:22 -0700 

hello!
    
 ????flink??????ieda????????????????????????????????????????Cannot have 
more than one execute() or executeAsyc() call in a single 
environment????????????????????job 
manager??????????????????????????????????????????????????????????????????????????
    
????????org.apache.flink.client.program.StreamContextEnvironment.validateAllowedExecution()??????139????

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