transports.File stops logger without any error message

I’m trying to use transports.File to save log file in loop with logger. After several logs print out it stops to write log to file and print nothing in console without any error message.

Here is my test code:

import winston from 'winston'

const winstonConfig = {
  level: 'debug',
  transports: [
    new winston.transports.Console(),
    new winston.transports.File({
      filename:  'file/path/to/combined.log',
      maxsize: 10 * 1024 * 1024,
      maxFiles: 10
    })
  ]
}
let logger = winston.createLogger(winstonConfig)

for(let i=0; i<10000; i++){
  logger.debug(i)
}

Is it stdout buffer issue?

I’m using version 3.0.0-rc1 with node:8-alpine image in docker container

[jansteuer]

@rcoedo commit fixes the issue but there is still an issue with formatting which I think is related to this.

const winston = require('winston')

const winstonConfig = {
  level: 'debug',
  transports: [
    new winston.transports.Console({
      format: winston.format.printf(info => `${info.level}: ${info.message}`)
    }),
    new winston.transports.File({
      filename: 'winston.log',
      maxsize: 10 * 1024 * 1024,
      maxFiles: 10,
      format: winston.format.printf(info => `${info.level}: ${info.message}`)
    })
  ]
}
const logger = winston.createLogger(winstonConfig)

for (let i = 0; i < 10000; i++) {
  logger.debug(i)
}

Produces this output to a file:

....
debug: 2600
debug: 2601
debug: 2602
debug: 2603
debug: 2604
debug: 2605
debug: 2606
{"message":2607,"level":"debug"}
{"message":2608,"level":"debug"}
{"message":2609,"level":"debug"}
{"message":2610,"level":"debug"}
{"message":2611,"level":"debug"}
{"message":2612,"level":"debug"}
{"message":2613,"level":"debug"}
{"message":2614,"level":"debug"}
{"message":2615,"level":"debug"}
{"message":2616,"level":"debug"}
{"message":2617,"level":"debug"}
{"message":2618,"level":"debug"}
{"message":2619,"level":"debug"}
{"message":2620,"level":"debug"}
{"message":2621,"level":"debug"}
debug: 2622
debug: 2623
debug: 2624
debug: 2625
debug: 2626
debug: 2627
debug: 2628
.....

Output in the console is formatted correctly.

[rcoedo]

I think this still happens when using the tailable: true option.