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https://issues.apache.org/jira/browse/KARAF-496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13006869#comment-13006869
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Andreas Pieber commented on KARAF-496:
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correction. I mean a different issue in linux :). This one is windows only (I 
can reproduce it)

> Karaf prompt displayed twice
> ----------------------------
>
>                 Key: KARAF-496
>                 URL: https://issues.apache.org/jira/browse/KARAF-496
>             Project: Karaf
>          Issue Type: Bug
>          Components: console
>    Affects Versions: 2.1.4, 2.2.0
>         Environment: Windows
>            Reporter: Jarek Gawor
>
> When running Karaf on Windows with -Djline.terminal=jline.UnsupportedTerminal 
> the Karaf prompt in the console is displayed twice after executing some 
> command (i.e. pressing enter).
> I believe the problem is in the jline library in 
> ConsoleReader.readLine(InputStream) as the function will return after seeing 
> first \r or \n. But on Windows \r\n is used as the EOL and the function does 
> not consume the remaining \n.

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