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Find out a cause of 'Possible EventEmitter memory leak detected' warning #8

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KimTaehee opened this issue Feb 10, 2021 · 1 comment
Open

Find out a cause of 'Possible EventEmitter memory leak detected' warning #8

KimTaehee opened this issue Feb 10, 2021 · 1 comment
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@tkbro
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bug Something isn't working enhancement New feature or request

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@KimTaehee
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재현:
app 종료시 아래와 같은 메시지 발생

(node:1) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 finish listeners added to [File]. Use emitter.setMaxListeners() to increase limit
(Use `node --trace-warnings ...` to show where the warning was created)
(node:1) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 error listeners added to [File]. Use emitter.setMaxListeners() to increase limit
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
전체 로그 
AdminController init start
Discord Bot init start
Server init start
{"message":"[    at Object.<anonymous> (/app/app.js:18:8] Application Start","level":"info"}
{"message":"[modules/discord/discord-bot.js:29:14] discord login with token: NzE1MjA4ODgzMTM1ODQwMzY4.XtNIFw.LkzJ7zucyfR5zoKXsSpZSoEzl90","level":"info"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
(node:1) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 finish listeners added to [File]. Use emitter.setMaxListeners() to increase limit
(Use `node --trace-warnings ...` to show where the warning was created)
(node:1) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 error listeners added to [File]. Use emitter.setMaxListeners() to increase limit
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
(node:1) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 31 finish listeners added to [PassThrough]. Use emitter.setMaxListeners() to increase limit
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
{"message":"[    at process.<anonymous> (/app/app.js:61:10] unhandeled rejection occured, TypeError: logger.on is not a function","level":"error"}
{"message":"[    at finalize (/app/app.js:32:10] Finalize start","level":"info"}
{"message":"[    at finalize (/app/app.js:39:10] logger flush start.","level":"info"}
@KimTaehee KimTaehee added bug Something isn't working enhancement New feature or request labels Feb 10, 2021
@tkbro
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tkbro commented Mar 17, 2021

#13
winstonjs/winston#1334
위 이슈 토의 내용에 transform 을 재사용하지 말라는 코드를 보고 수정하였습니다.
추가 확인은 필요할 듯 해보입니다.

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@KimTaehee @tkbro