public void shuttingDown() {
    if (useChildLogging()) {
      switchLogs(config.getLogFile(), true);
    }
  }
Called when manager starts shutting down. This is when any current child log needs to be closed
and the rest of the logging reverted to the main.
geode-core/src/main/java/org/apache/geode/internal/logging/ManagerLogWriter.java