static LogLevelUpdateScope getLogLevelUpdateScope() {
    try {
      return LogLevelUpdateScope.valueOf(System.getProperty(LOG_LEVEL_UPDATE_SCOPE_PROPERTY,
          GEODE_LOGGERS.name()).toUpperCase());
    } catch (IllegalArgumentException e) {
      return GEODE_LOGGERS;
    }
  }
Protected by synchronization on Configuration instance.
geode-core/src/main/java/org/apache/geode/logging/internal/Configuration.java