in src/main/java/org/apache/sling/commons/log/logback/internal/LogConfigManager.java [289:310]
public LogConfigManager(@NotNull BundleContext context) {
this.bundleContext = context;
this.logger = LoggerFactory.getLogger(getClass());
this.debug = Boolean.parseBoolean(bundleContext.getProperty(LogConstants.DEBUG));
this.converter = Converters.standardConverter();
loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
loggerContext.setName(CONTEXT_NAME);
setLoggerContext(loggerContext);
writerByPid = new ConcurrentHashMap<>();
writerByFileName = new ConcurrentHashMap<>();
configByPid = new ConcurrentHashMap<>();
configByCategory = new ConcurrentHashMap<>();
// populate the rootDir variable
getRootDir();
this.osgiIntegrationListener = new OsgiIntegrationListener(this);
this.configAdminSupport = new ConfigAdminSupport();
}