Not getting any logs for node process running through pm2 in cluster mode

Question

If I am running pm2 process for node js app in fork mode , The logs are getting generated but same app is not giving logs if running in pm2 cluster mode

I am using the below pm2 ecosystem file to start my app

module.exports = {
  apps : [
    {
    name: 'test',
    script: <entry_file_path>,
    exec_mode: "cluster",
    instances: 1,
    autorestart: true,
    watch: false,
    combine_logs:true,
    max_memory_restart: '1G',
    exp_backoff_restart_delay: 1000,
    merge_logs: true,
    env: {
      NODE_ENV: 'production'
    }
  }]
};

I am using log4js v5.2.2 for logging in my node app

Answer 1

Based on suggestion of @MAS below configuration worked for me

run this command "pm2 install pm2-intercom" & then add pm2: true in log4js config

log4js.configure({
  appenders: { out: { type: 'stdout'}},
  categories: { default: { appenders: ['out'], level: 'info'}},
  pm2: true
});

for more details refer https://github.com/log4js-node/log4js-node/blob/master/docs/clustering.md