Documentation Issue

[Maskime]

Hi,

For the log4j2.xml exemple file, you provide the following:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="OFF" packages="org.graylog2.log4j2">
    <Appenders>
        <GELF name="gelfAppender" server="graylog2.example.com" port="12201" hostName="appserver01.example.com">
            <PatternLayout pattern="%logger{36} - %msg%n"/>
            <Filters>
                <Filter type="MarkerFilter" marker="FLOW" onMatch="DENY" onMismatch="NEUTRAL"/>
                <Filter type="MarkerFilter" marker="EXCEPTION" onMatch="DENY" onMismatch="ACCEPT"/>
            </Filters>
            <!-- Additional fields -->
            <KeyValuePair key="foo" value="bar"/>
            <KeyValuePair key="jvm" value="${java:vm}"/>                
        </GELF>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="gelfAppender"/>
        </Root>
    </Loggers>
</Configuration>

But this will result with an error message with log4j2:2.6.2 on the Filters elements.
The way I got it to work is by using Filter type="" as specific class:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="OFF" packages="org.graylog2.log4j2">
    <Appenders>
        <GELF name="gelfAppender" server="graylog2.example.com" port="12201" hostName="appserver01.example.com">
            <PatternLayout pattern="%logger{36} - %msg%n"/>
            <Filters>
                <MarkerFilter marker="FLOW" onMatch="DENY" onMismatch="NEUTRAL"/>
                <MarkerFilter marker="EXCEPTION" onMatch="DENY" onMismatch="ACCEPT"/>
            </Filters>
            <!-- Additional fields -->
            <KeyValuePair key="foo" value="bar"/>
            <KeyValuePair key="jvm" value="${java:vm}"/>                
        </GELF>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="gelfAppender"/>
        </Root>
    </Loggers>
</Configuration>