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https://issues.apache.org/jira/browse/GUACAMOLE-1106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17138897#comment-17138897
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Mike Jumper commented on GUACAMOLE-1106:
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The log message indicates the receipt of a clipboard stream from the client. 
Yes, the stream may contain 0 bytes. No, the log message should not be removed.

Omitting the log message would be incorrect, as it would confuse debugging 
efforts related to clipboard where it is important to know that a clipboard 
stream has been received from the client, regardless of the amount of data in 
that stream. Clearing the clipboard through sending an empty stream is an 
entirely valid operation and it should be logged.

> Improper log message when there is no clipboard data
> ----------------------------------------------------
>
>                 Key: GUACAMOLE-1106
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-1106
>             Project: Guacamole
>          Issue Type: Bug
>          Components: guacamole-server, RDP
>    Affects Versions: 1.1.0
>            Reporter: Jimmy
>            Priority: Minor
>              Labels: log
>         Attachments: image-2020-06-17-21-23-56-419.png, 
> image-2020-06-18-01-11-42-736.png, image-2020-06-18-01-16-53-510.png, 
> image-2020-06-18-01-18-35-544.png
>
>
> I can see the following log message on the console of the guacamole server 
> whenever I select another application other than the browser:
> !image-2020-06-17-21-23-56-419.png!
> Especially, I didn't copy any text to the clipboard, but this log message is 
> displayed.
> I think that we need to decide whether the guacamole server shows this log 
> message or not based on certain criteria such as the length of the clipboard.
> If this issue is accepted by you, I want to fix it myself.
>  Thanks.



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