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https://issues.apache.org/jira/browse/NIFI-4877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16389936#comment-16389936
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Matt Burgess commented on NIFI-4877:
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[~boristyukin] Is this a duplicate of NIFI-528?

> ExecuteStreamCommand tasks stuck
> --------------------------------
>
>                 Key: NIFI-4877
>                 URL: https://issues.apache.org/jira/browse/NIFI-4877
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Extensions
>    Affects Versions: 1.5.0
>         Environment: Oracle Linux 6.8, NiFi 1.5.0
>            Reporter: Boris Tyukin
>            Priority: Critical
>
> there is no way to stop/kill processes, executed by ExecuteStreamCommand. 
> Steps to reproduce:
>  # In ExecuteStreamCommand processer, use sleep as a command, and 1000000 as 
> argument - this will make it run for a while. Set ignore STDIN to true.
>  # Run the flow and stop ExecuteStreamCommand processor - it will stop but 
> not really. the task will be stuck forever and the only workaround I found is 
> to restart nifi service which is not cool at all.
>  # to make it worse, processor would not accept new flowfiles and you cannot 
> Run it. Only restart fixes the issue.



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