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https://issues.apache.org/jira/browse/APEXCORE-408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15958879#comment-15958879
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Tushar Gosavi commented on APEXCORE-408:
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[~thw] I have opened a pull request
https://github.com/apache/apex-core/pull/476 for statslistener changes. I am
implementing the second approach from the document as it would be simple and
won't change existing code much. There are few problems I am facing regarding
the validation done by LogicalPlan while elements are being added to it, like
extending a stream the port needs to be present in the DAG. When I try to
extend an existing stream with new operator's input port , as new operator's
input port is not in the original DAG , it throws as error as port does not
belong to any operator in the DAG. Trying to solve this problem.
> Ability to schedule Sub-DAG from running application
> ----------------------------------------------------
>
> Key: APEXCORE-408
> URL: https://issues.apache.org/jira/browse/APEXCORE-408
> Project: Apache Apex Core
> Issue Type: Sub-task
> Reporter: Thomas Weise
> Assignee: Tushar Gosavi
>
> Today it is possible to add operators to a running application from the
> CLI/client. It should be possible to do this from within the application
> also. This can be used to expand/remove a Sub-DAG on demand, triggered by
> application specific logic. It will enable use cases such as batch
> applications that perform multiple stages of processing where not all
> resources are required at the same time or the logic of subsequent steps
> depends on the execution of previous steps.
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