private boolean activeLogFull() {
    long limit = getLogFileSizeLimit();
    if (limit == Long.MAX_VALUE) {
      return false;
    } else {
      return getBytesLogged() >= limit;
    }
  }
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