Caused by: org.apache.flink.util.FlinkRuntimeException: Cannot have more than one execute() or executeAsync() call in a single environment.
at org.apache.flink.client.program.StreamContextEnvironment.valida
teallowedExecution(StreamContextEnvironment.java:139) ~[flink-
dist_2.11-1.11.2.jar:1.11.2]
at org.apache.flink.client.program.StreamContextEnvironment.executeAsync(StreamContextEnvironment.java:127) ~[flink-
dist_2.11-1.11.2.jar:1.11.2]
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