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https://issues.apache.org/jira/browse/FLINK-2508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14701270#comment-14701270
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Aljoscha Krettek commented on FLINK-2508:
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I think the batch API would have the same problem, it is just that there we
don't have the lingering (dangling) operators.
> Confusing sharing of StreamExecutionEnvironment
> -----------------------------------------------
>
> Key: FLINK-2508
> URL: https://issues.apache.org/jira/browse/FLINK-2508
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 0.10
> Reporter: Stephan Ewen
> Assignee: Márton Balassi
> Fix For: 0.10
>
>
> In the {{StreamExecutionEnvironment}}, the environment is once created and
> then shared with a static variable to all successive calls to
> {{getExecutionEnvironment()}}. But it can be overridden by calls to
> {{createLocalEnvironment()}} and {{createRemoteEnvironment()}}.
> This seems a bit un-intuitive, and probably creates confusion when
> dispatching multiple streaming jobs from within the same JVM.
> Why is it even necessary to cache the "current" execution environment?
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