no file output when exit() is reached

[mediamagnet]

When executing a multiWriter as part of a try catch if I have the program run an exit() as part of the error handling I get no output into a file if I comment out the exit it will write to the file as expected however execution will continue which in the case of a config file I don't want to happen... I'm not sure if I'm doing something wrong or if there is something else at play here.

[Bungeefan]

Hi, could you please add some code which showcases your problem?

[praxa-enzo]

We experience the same issue. We have a logger configured which outputs to stdout and a file. The output to stdout is fine when using exit() while the file does not contain the last log lines.

[mediamagnet]

sorry was on vacation when you replied

catch (e) {
    if (e is TomlException) {
      multiLogger(e.toString(), Level.wtf, 'TOML Error');
      exit(13);
    } else if (e is MySQLException) {
      multiLogger(e.toString(), Level.wtf, 'MySQL Error');
      exit(13);
    } else if (e is PathNotFoundException || e is PathAccessException) {
      multiLogger(e.toString(), Level.wtf, 'Path not found');
      exit(2);
    }

and then multilogger just calls the logger from the library so i didn't have to set it up in each of the different bits of the files

Future multiLogger(String? event, Level level, [String? message]) async {
  final logfile = io.File('tessera.log');
  var logger = Logger(
      filter: ProductionFilter(),
      printer: HybridPrinter(
        PrefixPrinter(SimplePrinter(colors: false, printTime: true)),
        error: PrefixPrinter(
            PrettyPrinter(colors: false, printEmojis: true, printTime: true)),
        warning: PrefixPrinter(
            PrettyPrinter(colors: false, printEmojis: true, printTime: true)),
        wtf: PrefixPrinter(
            wtf: 'FATAL',
            PrettyPrinter(colors: false, printEmojis: true, printTime: true)),
      ),
      output: MultiOutput([
        ConsoleOutput(),
        FileOutput(
          file: logfile,
          overrideExisting: false,
          encoding: utf8,
        ),
      ]));
  logger.log(level, event, message);
  logger.close();
}

[Bungeefan]

I guess I found your problem. The output is probably missing due to FileOutput being silently async, which can probably never finish flushing your logs because of your exit call. The async functionality is implemented in 2.0.0 and will make logger.close() await-able. More information: #20