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https://issues.apache.org/jira/browse/LOG4J2-409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13774682#comment-13774682
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Ralph Goers commented on LOG4J2-409:
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I'm not sure whether or not the backslashes have anything to do with this.
Can you please try {code}file:///${user.home}/someDirectory/log4j2.xml{code}.
Note the extra forward slash. The syntax for a uri is
[scheme:][//authority][path]. For an absolute path you need a leading '/' which
makes it "/C:path" on Windows.
> Specifying log4jConfiguration in web.xml fails on Windows when using
> ${user.home}
> ---------------------------------------------------------------------------------
>
> Key: LOG4J2-409
> URL: https://issues.apache.org/jira/browse/LOG4J2-409
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.0-beta8
> Environment: Windows 7, Apache Tomcat 7, Java 7
> Reporter: Frank Steinmann
>
> When specifying the context parameter log4jConfiguration in the web.xml of a
> web application and using $\{user.home\} as part of the path, e.g.
> {code:xml}
> <context-param>
> <param-name>log4jConfiguration</param-name>
> <param-value>file://${user.home}/someDirectory/log4j2.xml</param-value>
> </context-param>
> {code}
> the following exception is thrown on Windows systems:
> {noformat}
> java.net.URISyntaxException: Illegal character in authority at index 7:
> file://C:\Users\steinman/someDirectory/log4j2.xml
> at java.net.URI$Parser.fail(Unknown Source)
> at java.net.URI$Parser.parseAuthority(Unknown Source)
> at java.net.URI$Parser.parseHierarchical(Unknown Source)
> at java.net.URI$Parser.parse(Unknown Source)
> at java.net.URI.<init>(Unknown Source)
> at
> org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:46)
> ...
> {noformat}
> It is because of the backslashes that are not allowed in URIs.
> There is an example in the documentation using backslashes
> ([http://logging.apache.org/log4j/2.x/manual/webapp.html]) which will produce
> the same exception.
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