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https://issues.apache.org/jira/browse/SLING-355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585484#action_12585484
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Carsten Ziegeler commented on SLING-355:
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Yes, I mean the case where a request parameter with an empty value is used to 
set the value of a property. And then this property should rather be removed
than trying to set the empty string as a value (which fails for all non string 
properties)

> Empty Request Parameters should be handled as not present
> ---------------------------------------------------------
>
>                 Key: SLING-355
>                 URL: https://issues.apache.org/jira/browse/SLING-355
>             Project: Sling
>          Issue Type: Bug
>          Components: ujax
>            Reporter: Carsten Ziegeler
>   Original Estimate: 0h
>  Remaining Estimate: 0h
>
> When the sling post servlet tries to set a property which value is empty, it 
> fails to set the property value if the proper type is not a string as it for 
> example tries to convert the empty string into a long - which fails.
> Therefore the servlet should treat empty values as not existing ones and 
> rather remove the property.

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