Inconsistent behavior of Log4js with PM2

Hi all,

I am using log4js v 5.1.0 in PM2 mode with 2 workers and log level as debug. I have noticed that in particular file where log.debug is not used(only log.info) then logs not are getting written. Is that expected or i am missing something?

{
                appenders: {
                    app: {
                        type: 'dateFile',
                        filename: 'log_file.log',
                        pattern: '-yyyy-MM-dd',
                        alwaysIncludePattern: false,
                        maxLogSize: '10000',
                        backups: '10',
                        layout: {
                            type: 'pattern',
                            pattern: '[%d] [%p] [%c] %m'
                        }
                    }
                },
                categories: {
                    default: {
                        appenders: ['app'],
                        level: 'debug'
                    }
                },
                pm2: true,
            }

Start by reproducing the reported behavior with log4js v5.1.0, PM2 in cluster mode with two workers, and the configuration shown in the issue. Compare a file that calls only log.info with one that calls log.debug, and verify whether the dateFile appender writes output. No source files or tests are identified, so the affected entry point still needs to be located.