Wechaty: How to avoid the memory leak

[lijiarui]

When I running wechaty for a while using npm package and hot-import module, I got the following logs

07:58:29 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
08:00:32 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
08:02:34 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
08:04:36 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
08:06:39 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
08:08:42 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
08:10:44 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
08:12:47 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
(node:59547) Warning: Possible EventEmitter memory leak detected. 11 scan listeners added. Use emitter.setMaxListeners() to increase limit
(node:59547) Warning: Possible EventEmitter memory leak detected. 11 login listeners added. Use emitter.setMaxListeners() to increase limit
(node:59547) Warning: Possible EventEmitter memory leak detected. 11 logout listeners added. Use emitter.setMaxListeners() to increase limit
(node:59547) Warning: Possible EventEmitter memory leak detected. 11 heartbeat listeners added. Use emitter.setMaxListeners() to increase limit
08:14:49 WARN PuppetWeb initWatchdogForPuppet() dog.on(reset) last food:inited, timeout:120000
(node:59547) Warning: Possible EventEmitter memory leak detected. 11 watchdog listeners added. Use emitter.setMaxListeners() to increase limit

How can I avoid this memory leak?

When I kill the process, I also can see a lot of chrome work background

lijiarui:~/workspace (master) $ ps -A
    PID TTY          TIME CMD
      1 ?        00:00:07 tini
      7 ?        00:00:00 micro-inetd
  34436 ?        00:00:00 tmux
  34437 pts/1    00:00:00 bash
  34438 pts/1    00:00:00 bash
  59079 ?        00:00:32 chrome
  59081 ?        00:00:00 chrome
  59102 ?        00:00:06 chrome
  59110 ?        00:01:13 chrome
  59220 ?        00:00:35 chrome
  59222 ?        00:00:00 chrome
  59243 ?        00:00:05 chrome
  59250 ?        00:01:18 chrome
  59468 ?        00:00:14 chrome
  59470 ?        00:00:00 chrome
  59491 ?        00:00:01 chrome
  59498 ?        00:01:04 chrome
  60100 ?        00:00:00 dropbear
  60101 ?        00:00:04 vfs-worker {"pi
  61144 pts/0    00:00:00 tmux
  62106 ?        00:00:00 chrome
  62108 ?        00:00:00 chrome
  62129 ?        00:00:00 chrome
  62136 ?        00:00:02 chrome
  62185 pts/1    00:00:00 ps

When I kill all relate process and restart a bot, then I found it still run a lot of chrom background

lijiarui:~/workspace (master) $ ps -A
    PID TTY          TIME CMD
      1 ?        00:00:07 tini
      7 ?        00:00:00 micro-inetd
  34436 ?        00:00:00 tmux
  34437 pts/1    00:00:00 bash
  34438 pts/1    00:00:00 bash
  60100 ?        00:00:00 dropbear
  60101 ?        00:00:04 vfs-worker {"pi
  61144 pts/0    00:00:00 tmux
  62230 pts/1    00:00:00 node
  62240 pts/1    00:00:04 node
  62250 ?        00:00:02 chrome
  62252 ?        00:00:00 chrome
  62273 ?        00:00:00 chrome
  62280 ?        00:00:06 chrome
  62326 pts/2    00:00:00 tmux
  62328 pts/3    00:00:00 bash
  62329 pts/3    00:00:00 bash
  62791 pts/3    00:00:00 ps

[huan]

Please provide the reproduce steps.

And also instead of asking how, it's better to provide a pull request to fix it.

[lijiarui]

maybe it is related to #978 but I'm not sure... still dig in it.

[lijiarui]

Using silly log, just run the smallest wechaty getting started demo will get the following result, maybe there are too many checkScan here.

07:22:39 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:40 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:41 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:42 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:43 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:44 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:45 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:46 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:47 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:48 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:49 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:50 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:51 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:52 SILL PuppetWebEvent onDing(heartbeat@browser)
07:22:52 SILL PuppetWeb initWatchdogForPuppet() dog.on(feed, food={type=undefined, data=heartbeat@browser})
07:22:52 SILL Wechaty memoryCheck() free: 3809 MB, require: 4 MB
07:22:52 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:53 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:54 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:55 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:56 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:57 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:58 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:22:59 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:23:00 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:23:01 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)
07:23:02 SILL PuppetWebEvent onLog(checkScan() code:0 url:https://login.weixin.qq.com/qrcode/4djX8rs1VA== scanCode:0)

[lijiarui]

This is a typescript bug

[huan]

There do have a memory leak. Please keep this issue open.

[huan]

Should have been fixed by the related commit.

[atubo2012]

The error appears after starting wechaty for 5 days .