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https://issues.apache.org/jira/browse/SLING-6482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16226229#comment-16226229
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Chetan Mehrotra commented on SLING-6482:
----------------------------------------

Thanks [~kwin] for the details. Fixed this with 
[commit|https://gitbox.apache.org/repos/asf?p=sling-org-apache-sling-commons-log.git;a=commitdiff;h=eb3a92d8eb454ff8091e24408d35802006ebba94].
 

Now an empty fileName is mapped to "console" appender. This works fine post 
edits also.

[~kwin] Can you validate the behaviour once with trunk to check it addresses 
your concerns. 

> Commons Log WebConsole: Exception when creating logger with an empty log file
> -----------------------------------------------------------------------------
>
>                 Key: SLING-6482
>                 URL: https://issues.apache.org/jira/browse/SLING-6482
>             Project: Sling
>          Issue Type: Bug
>          Components: Commons
>    Affects Versions: Commons Log 5.0.0
>            Reporter: Bjoern Weide
>            Priority: Minor
>             Fix For: Commons Log 5.0.4
>
>         Attachments: SLING-6482-v01.patch
>
>
> When creating a new logger via WebConsole specifying an empty logfile it 
> causes an StringIndexOutOfBoundsException when (re-)opening the WebConsole.
> {noformat}
> java.lang.StringIndexOutOfBoundsException: String index out of range: -1
>       at java.lang.String.substring(String.java:1931)
>       at 
> org.apache.sling.commons.log.logback.internal.SlingLogPanel.getPath(SlingLogPanel.java:791)
> ...
> {noformat}



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