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https://issues.apache.org/jira/browse/FLINK-4039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15342033#comment-15342033
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Gyula Fora commented on FLINK-4039:
-----------------------------------

I think the only reasonable solution I see would be to try to figure out wether 
the use passed any GC arguments that should overwrite our G1 setting. I am not 
sure if this is possible though...

> G1 garbage collector only set if no custom jvm arguments
> --------------------------------------------------------
>
>                 Key: FLINK-4039
>                 URL: https://issues.apache.org/jira/browse/FLINK-4039
>             Project: Flink
>          Issue Type: Bug
>          Components: Startup Shell Scripts
>    Affects Versions: 1.0.0, 1.1.0
>            Reporter: Gyula Fora
>            Priority: Critical
>             Fix For: 1.1.0
>
>
> This can lead to very unexpected behaviour with java 8.
> Let's say I want to profile my job so I set some jvm arguments, but this also 
> implicitly change the gc which is kind of weird.



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