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https://issues.apache.org/jira/browse/FLINK-1400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14277522#comment-14277522
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Stephan Ewen commented on FLINK-1400:
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I think you can also locally start a job manager with multiple task managers.
In 0.8, you can use the MiniCluster and set the number of taskmanagers there.
With 2 and more, you will see that the data port is actually used.
> In local mode, the default TaskManager won't listen on the data port.
> ---------------------------------------------------------------------
>
> Key: FLINK-1400
> URL: https://issues.apache.org/jira/browse/FLINK-1400
> Project: Flink
> Issue Type: Bug
> Affects Versions: 0.9
> Environment: Ubuntu 14.04 LTS
> Reporter: Sergey Dudoladov
> Priority: Minor
>
> The Task Manager automatically started by the Job Manager (JobManager.scala,
> appr. line 470) in the local mode does not listen on the dataport.
> To reproduce:
> 1) Start Flink via ./start-local.sh
> 2) Look up the data port number on locahost:8081 -> "Task Managers" tab
> 3) sudo netstat -taupen | grep "dataport_number "
>
> Or start the second Task Manager and run Flink with the degree of
> parallelism 2 (assuming one slot per Task Manager)
> 4) ./flink run -p 2 ...
> Task Managers started via ./taskmanager.sh work fine.
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