[BUG] MaxListenersExceededWarning: Possible EventEmitter memory leak detected. (v10) #6763

doberkofler · 2023-09-05T12:02:23Z

Is there an existing issue for this?

I have searched the existing issues

This issue exists in the latest npm version

I am using the latest npm

Current Behavior

After upgrading to npm 10, I get the following error message:

$ npm outdated
(node:53918) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
(Use `node --trace-warnings ...` to show where the warning was created)

Expected Behavior

no error

Steps To Reproduce

In this environment...
With this config...
Run '...'
See error...

Environment

npm: 10.0.0
Node.js: v20.6.0
OS Name: macOS 13.5.1
System Model Name:
npm config:

; "user" config from /Users/doberkofler/.npmrc

//registry.npmjs.org/:_authToken = (protected)

; "project" config from /Users/doberkofler/MyDev/ljs_app/trunk/periscope/.npmrc

engine-strict = true

; node bin location = /Users/doberkofler/.nvm/versions/node/v20.6.0/bin/node
; node version = v20.6.0
; npm local prefix = /Users/doberkofler/MyDev/ljs_app/trunk/periscope
; npm version = 10.0.0
; cwd = /Users/doberkofler/MyDev/ljs_app/trunk/periscope
; HOME = /Users/doberkofler
; Run `npm config ls -l` to show all defaults.

rotu · 2023-09-06T06:44:42Z

~~Possibly related? 7f81e96~~ probably not

lukekarrys · 2023-09-07T23:48:21Z

@doberkofler can you run NODE_OPTIONS=--trace-warnings npm outdated and paste the output here to show where those warnings are originating from?

lukekarrys · 2023-09-08T01:13:54Z

I haven't been able to reproduce this yet. I've tried running npm outdated on various large install trees with many outdated packages. I also patched the TLSSocket returned from @npmcli/agent with the following code and can only ever see 1 or 2 close events being added per socket.

      const og = socket.on
      socket.on = function (...args) {
        if (args[0] === 'close') {
          console.error('close event on socket added', socket.listenerCount('close'))
        }
        return og.apply(this, args)
      }

@doberkofler A reproduction with a package.json or package-lock.json file would help a lot as well if possible.

rotu · 2023-09-08T05:41:38Z

I wonder if this has to do with this line in the agents.js connect() function which throws an [Error] (array with a single error) instead of throwing an Error.

https://github.com/npm/agent/blob/4b2c4d1a4d005748cd9bf5066cee29f31c56d11e/lib/agents.js#L126-L128

cli/node_modules/events/events.js

Lines 449 to 468 in d0b7899

    
           function once(emitter, name) { 
        
             return new Promise(function (resolve, reject) { 
        
               function errorListener(err) { 
        
                 emitter.removeListener(name, resolver); 
        
                 reject(err); 
        
               } 
        
               function resolver() { 
        
                 if (typeof emitter.removeListener === 'function') { 
        
                   emitter.removeListener('error', errorListener); 
        
                 } 
        
                 resolve([].slice.call(arguments)); 
        
               }; 
        
               eventTargetAgnosticAddListener(emitter, name, resolver, { once: true }); 
        
               if (name !== 'error') { 
        
                 addErrorHandlerIfEventEmitter(emitter, errorListener, { once: true }); 
        
               } 
        
             }); 
        
           }

doberkofler · 2023-09-08T05:58:19Z

This is the requested output and I attached the package-lock.json file.

(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
(node:19864) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:706:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:715:22)
    at internalConnectMultiple (node:net:1123:30)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)
Package         Current  Wanted        Latest  Location                     Depended by
@types/select2    3.5.6   3.5.6        4.0.58  node_modules/@types/select2  periscope
chalk             4.1.2   4.1.2         5.3.0  node_modules/chalk           periscope
dropzone          5.9.3   5.9.3  6.0.0-beta.2  node_modules/dropzone        periscope
select2           3.5.1   3.5.1    4.1.0-rc.0  node_modules/select2         periscope

package-lock.json.zip

rotu · 2023-09-08T23:01:44Z

Possibly also this Promise that can never resolve: https://github.com/npm/agent/blob/c51096b1903422fe14011871add7c66f9ba27189/lib/util.js#L23

Ref #6763

lukekarrys · 2023-09-11T16:57:50Z

thank you @doberkofler for the reproduction. I was able to find that this only happens in Node 20.4.0 and above, and goes away if the Node flag --no-network-family-autoselection is used.

So a potential workaround is to use NODE_OPTIONS=--no-network-family-autoselection when calling npm.

I also created a failing test case in https://github.com/npm/cli/pull/6781/files to document the current behavior. I'm sure this is due to the new @npmcli/agent but unsure if the fix will end up being there or possibly in Node. This PR in Node points to some other libraries having issues with network family autoselection but only in earlier releases: nodejs/node#48464

rotu · 2023-10-04T20:32:40Z

So a potential workaround is to use NODE_OPTIONS=--no-network-family-autoselection when calling npm.

BTW, this seems to cause trouble with VSCode:

➜  ~ npm config edit
/Applications/Visual Studio Code.app/Contents/MacOS/Electron: --no-network-family-autoselection is not allowed in NODE_OPTIONS
npm ERR! editor process exited with code: 9

pimterry · 2023-10-11T11:08:50Z

Can't be 100% sure, but I think I've found a small bug in Node that could the underlying cause of this (nodejs/node#50136) - once that's resolved this might go away 😄. Thanks to @lukekarrys for the pointers towards autoSelectFamily being the trigger here!

soulchild · 2023-11-02T11:25:46Z

This makes it impossible for us to make the switch to Node 20 because all projects are failing our Gitlab CI build pipeline.

I tried the suggested --no-network-family-autoselection workaround which seems to make the MaxListenersExceededWarning warnings disappear, but then the npm install command immediately fails with an ECONNREFUSED error.

We're behind a proxy and my experience has been that 90% of ECONNREFUSED errors are due to abysmal proxy support in Node.js and third-party libraries.

soulchild · 2023-11-02T14:46:02Z

I just found out that the current Node LTS 20.9.0 ships with npm v10.1.0 which is known to ignore proxy environment variables. So I'm probably seeing two distinct problems here.

lukekarrys · 2023-11-04T01:54:13Z

I believe this is now fixed due to the linked Node bug above being fixed.

npm/cli#6763

npm/cli#6763 npm

lukewealth · 2023-11-29T20:33:34Z

I believe this is now fixed due to the linked Node bug above being fixed.

sorry please i am confused. How did you fix it?

mklueh · 2023-11-29T21:47:07Z

I'm facing the same with Yarn 4.0.2

soulchild · 2023-11-30T07:14:31Z

I can confirm that this error is gone with the latest Node 20.10.0. Also, proxies are working again with the included npm 10.2.3.

This was a bug in Node.js that has been fixed (ref nodejs/node#50136). Ref #6763

chuksjoe · 2024-02-08T13:08:17Z

I upgraded my node version to v20.11.0 and the issue disappeared.

Manraj689 · 2024-03-08T06:34:31Z

Upgraded the node version to 20.11.1, but still persists

Bumping to 20.11.0 due to a bug with event emitter on npm install See: npm/cli#6763 (comment)

CORTEZpedr · 2024-07-23T06:36:45Z

I encountered the warning with the same message. After upgrading to Node.js version 20.11.0, the warning disappeared:

 ○ Compiling / ...
(node:25775) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit
    at _addListener (node:events:588:17)
    at TLSSocket.addListener (node:events:606:10)
    at Readable.on (node:internal/streams/readable:904:35)
    at TLSSocket._wrapHandle (node:_tls_wrap:674:8)
    at TLSSocket.reinitializeHandle (node:_tls_wrap:683:22)
    at internalConnectMultiple (node:net:1123:30)
    at internalConnectMultiple (node:net:1177:5)
    at Timeout.internalConnectMultipleTimeout (node:net:1687:3)
    at listOnTimeout (node:internal/timers:575:11)
    at process.processTimers (node:internal/timers:514:7)

.....

✓ Compiled / in 8.1s (2406 modules)

$ node --version
v20.5.0
$ nvm install 20.11.0
Downloading and installing node v20.11.0...
Downloading https://nodejs.org/dist/v20.11.0/node-v20.11.0-linux-x64.tar.xz...
############################################################################# 100.0%
Computing checksum with sha256sum
Checksums matched!
Now using node v20.11.0 (npm v10.2.4)

After this, the warning no longer appeared.

○ Compiling / ...
 ✓ Compiled / in 2.9s (2314 modules)

doberkofler added Bug thing that needs fixing Needs Triage needs review for next steps Release 9.x work is associated with a specific npm 9 release labels Sep 5, 2023

doberkofler changed the title ~~[BUG] MaxListenersExceededWarning: Possible EventEmitter memory leak detected.~~ [BUG] MaxListenersExceededWarning: Possible EventEmitter memory leak detected. (v10) Sep 6, 2023

saquibkhan added the Release 10.x label Sep 7, 2023

lukekarrys self-assigned this Sep 8, 2023

lukekarrys added Priority 2 secondary priority issue and removed Needs Triage needs review for next steps Release 9.x work is associated with a specific npm 9 release labels Sep 8, 2023

lukekarrys mentioned this issue Sep 8, 2023

chore: add test for max listener warnings #6781

Merged

lukekarrys added a commit that referenced this issue Sep 8, 2023

chore: add test for max listener warnings

1f9b81b

Ref #6763

lukekarrys added a commit that referenced this issue Sep 8, 2023

chore: add test for max listener warnings

8dbd829

Ref #6763

lukekarrys added a commit that referenced this issue Sep 11, 2023

chore: add test for max listener warnings

bef82f5

Ref #6763

rotu mentioned this issue Sep 11, 2023

Code smells npm/agent#57

Closed

1 task

bnoordhuis mentioned this issue Sep 29, 2023

Max Listeners Exceeded Warning nodejs/node#49955

Closed

vpmedia mentioned this issue Oct 1, 2023

[BUG] MaxListenersExceededWarning: Possible EventEmitter memory leak detected. #6854

Closed

2 tasks

lukekarrys added the regression:10.x label Oct 6, 2023

pimterry mentioned this issue Oct 11, 2023

Reduce TLS 'close' event listener warnings caused by autoSelectFamily nodejs/node#50136

Merged

augustjk mentioned this issue Oct 27, 2023

[infra] Use Node 18 for windows-tools test lit/lit#4333

Merged

lukekarrys closed this as completed Nov 4, 2023

rickysarraf added a commit to rickysarraf-notmine/photoprism that referenced this issue Nov 9, 2023

npm --no-network-family-autoselection

9d1e7cc

npm/cli#6763

rickysarraf added a commit to rickysarraf-notmine/photoprism that referenced this issue Nov 9, 2023

npm --no-network-family-autoselection

4148074

npm/cli#6763 npm

frosty00 mentioned this issue Nov 20, 2023

(node:10501) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [TLSSocket]. Use emitter.setMaxListeners() to increase limit ccxt/ccxt#19309

Open

lukekarrys added a commit that referenced this issue Dec 2, 2023

chore: delete max listeners test

238e3d7

This was a bug in Node.js that has been fixed (ref nodejs/node#50136). Ref #6763

lukekarrys mentioned this issue Dec 2, 2023

chore: delete max listeners test #7055

Merged

wraithgar pushed a commit that referenced this issue Dec 4, 2023

chore: delete max listeners test

5a2e334

This was a bug in Node.js that has been fixed (ref nodejs/node#50136). Ref #6763

GulajavaMinistudio mentioned this issue Dec 5, 2023

Create a new pull request by comparing changes across two branches GulajavaMinistudio/cli#85

Merged

alexcos20 mentioned this issue Dec 19, 2023

bump to node v20.10.0 oceanprotocol/ocean-node#177

Merged

boldt mentioned this issue Dec 19, 2023

[BUG] MaxListenersExceededWarning: Possible EventEmitter - broken node 20 microsoft/playwright#28713

Closed

alcpereira added a commit to alcpereira/100hunters that referenced this issue Mar 18, 2024

chore: change node version to 20.11.0

c0431ce

Bumping to 20.11.0 due to a bug with event emitter on npm install See: npm/cli#6763 (comment)

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[BUG] MaxListenersExceededWarning: Possible EventEmitter memory leak detected. (v10) #6763

[BUG] MaxListenersExceededWarning: Possible EventEmitter memory leak detected. (v10) #6763

doberkofler commented Sep 5, 2023

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doberkofler commented Sep 8, 2023

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pimterry commented Oct 11, 2023

soulchild commented Nov 2, 2023

soulchild commented Nov 2, 2023

lukekarrys commented Nov 4, 2023

lukewealth commented Nov 29, 2023

mklueh commented Nov 29, 2023

soulchild commented Nov 30, 2023

chuksjoe commented Feb 8, 2024

Manraj689 commented Mar 8, 2024

CORTEZpedr commented Jul 23, 2024

[BUG] MaxListenersExceededWarning: Possible EventEmitter memory leak detected. (v10) #6763

[BUG] MaxListenersExceededWarning: Possible EventEmitter memory leak detected. (v10) #6763

Comments

doberkofler commented Sep 5, 2023

Is there an existing issue for this?

This issue exists in the latest npm version

Current Behavior

Expected Behavior

Steps To Reproduce

Environment

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