[LOG4J2-1982] Log4j-config.xsd only allows one AppenderRef element for each Logger element

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.2
• Fix Version/s: 2.9.0
• Component/s: Configurators

Environment

Alle environments

• Assignee: Unassigned
• Reporter: Christoph Lembeck
• Created: 20/Jul/17 10:52
• Updated: 12/Oct/17 23:11
• Resolved: 20/Jul/17 18:56

Description

The xsd schema definition for the log4j configuration allow only one AppenderRef per Logger. The definition of the Logger element is as follows

<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>

Comparing this to the Definition of the root Logger we see a sequence of multiple Appender
Ref elements to be allowed.

<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>

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.

Issue Links

• is related to: LOG4J2-2073 Log4j-config.xsd should make AppenderRef optional for each Logger element