[seq] Circular structure found

[Dru-Go]

The Error looks like the following

{"@t":"2023-10-17T18:53:34.2890000Z","@mt":"[seq] Circular structure found","@m":"[seq] Circular structure found","@i":"f91a6406","@l":"Error"}

My Logger setup is the following

import { createLogger, format, transports } from 'winston'
import { TransformableInfo } from 'logform'
import { SeqTransport } from '@datalust/winston-seq'

// Define log format
const customFormat = format.printf((info: TransformableInfo) => {
    const { timestamp, level, message, stack } = info
    return `${timestamp} [${level}]: ${message} ${stack || ''}`
})

// Define transports
const commonTransport = new transports.File({ filename: 'logs/common.log' })
const errorTransport = new transports.File({
    filename: 'logs/error.log',
    level: 'error'
})

// Define log transports
const transportsArray = [
    new transports.Console(),
    new SeqTransport({
        serverUrl: "http://localhost:5341",
        onError: (e => { console.error(e) }),
        handleExceptions: true,
        handleRejections: true,
      }),
    commonTransport,
    errorTransport
]

// Create logger instance
const logger = createLogger({
    level: 'info',
    defaultMeta: { application: 'Noah Server' },
    format: format.combine(
        format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
        format.errors({ stack: true }),
        format.splat(),
        format.json(),
        customFormat
    ),
    transports: transportsArray
})

export default logger

[liammclennan]

This message refers to the data being logged. You can't log an object that refers to an object that refers back to the first object because it can't be serialized.

[Dru-Go]

Thank you

[liammclennan]

You're welcome.