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https://issues.apache.org/jira/browse/LOG4J2-1982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16202777#comment-16202777
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Gary Gregory commented on LOG4J2-1982:
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Right! Fixing with https://issues.apache.org/jira/browse/LOG4J2-2073
> Log4j-config.xsd only allows one AppenderRef element for each Logger element
> ----------------------------------------------------------------------------
>
> Key: LOG4J2-1982
> URL: https://issues.apache.org/jira/browse/LOG4J2-1982
> Project: Log4j 2
> Issue Type: Bug
> Components: Configurators
> Affects Versions: 2.8.2
> Environment: Alle environments
> Reporter: Christoph Lembeck
> Fix For: 2.9.0
>
>
> The xsd schema definition for the log4j configuration allow only one
> AppenderRef per Logger. The definition of the Logger element is as follows
> {code:xml}
> <xs:complexType name="LoggerType">
> <xs:sequence>
> <xs:choice minOccurs="0" maxOccurs="1">
> <xs:element name="Filters" type="FiltersType"/>
> <xs:element name="Filter" type="FilterType"/>
> </xs:choice>
> <xs:element name="AppenderRef" type="AppenderRefType"/>
> </xs:sequence>
> <xs:attribute name="name" type="xs:string" use="required"/>
> <xs:attribute name="level" type="xs:string" use="optional"/>
> <xs:attribute name="additivity" type="xs:string" use="optional"/>
> </xs:complexType>
> {code}
> Comparing this to the Definition of the root Logger we see a sequence of
> multiple Appender
> Ref elements to be allowed.
> {code:xml}
> <xs:complexType name="RootType">
> <xs:sequence>
> <xs:element name="AppenderRef" type="AppenderRefType"
> minOccurs="1" maxOccurs="unbounded"/>
> </xs:sequence>
> <xs:attribute name="level" type="xs:string"/>
> </xs:complexType>
> {code}
> With this configuration it is not possible to define a specific Logger, that
> shows infos and errors to the console and writes only the errors in a log
> file, since there can only be one appender defined for that logger.
> Please modify the xsd file to allow mutliple AppenderRef elements per Logger.
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