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我正在尝试为 log4j 2.0 创建自定义模式转换器，但在让我的 log4j 配置识别模式时遇到问题。这是自定义转换器：

package com.test.log4j.plugins;

import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.pattern.ConverterKeys;
import org.apache.logging.log4j.core.pattern.LogEventPatternConverter;

@Plugin(name="MarkerNamePatternConverter", category="Converter")
@ConverterKeys({"markername"})
public class MarkerNamePatternConverter extends LogEventPatternConverter {

    public static MarkerNamePatternConverter newInstance(final String[] options) {
        return new MarkerNamePatternConverter("markername", "markername");
    }

    protected MarkerNamePatternConverter(String name, String style) {
        super(name, style);
    }

    @Override
    public void format(LogEvent event, StringBuilder toAppendTo) {
        Marker marker = event.getMarker();
        if (marker != null) {
            // MarkerPatternConverter appends Marker.toString()
            // which includes the parents of the marker.  We just
            // …