possible EventEmitter memory leak detected

[gmarcz]

I got this strange error in my log file, is it related to this module ? It is not the full trace but these lines keep repeating.

2014-10-22T09:30:31.326261002Z (node) warning: possible EventEmitter memory leak detected. 11 listeners added. Use emitter.setMaxListeners() to increase limit. 2014-10-22T09:30:31.330676223Z Trace 2014-10-22T09:30:31.330676223Z at EventEmitter.addListener (events.js:160:15) 2014-10-22T09:30:31.330676223Z at Readable.on (_stream_readable.js:689:33) 2014-10-22T09:30:31.330676223Z at Readable.pipe (_stream_readable.js:491:8) 2014-10-22T09:30:31.330676223Z at pipe (tls.js:1409:18) 2014-10-22T09:30:31.330676223Z at exports.connect (tls.js:1355:19) 2014-10-22T09:30:31.330676223Z at Socket. (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:136:29) 2014-10-22T09:30:31.330676223Z at g (events.js:180:16) 2014-10-22T09:30:31.330676223Z --------------------------------------------- 2014-10-22T09:30:31.330676223Z at Socket.connect (net.js:800:10) 2014-10-22T09:30:31.330676223Z at exports.connect.exports.createConnection (net.js:94:35) 2014-10-22T09:30:31.330676223Z at connectStream (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:134:27) 2014-10-22T09:30:31.330676223Z at CleartextStream. (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:176:15) 2014-10-22T09:30:31.330676223Z at EventEmitter.emit (events.js:117:20) 2014-10-22T09:30:31.330676223Z at _stream_readable.js:920:16 2014-10-22T09:30:31.330676223Z --------------------------------------------- 2014-10-22T09:30:31.330676223Z at Readable.on (_stream_readable.js:689:33) 2014-10-22T09:30:31.330676223Z at Socket. (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:175:23) 2014-10-22T09:30:31.330676223Z at g (events.js:180:16) 2014-10-22T09:30:31.330676223Z at EventEmitter.emit (events.js:92:17) 2014-10-22T09:30:31.330676223Z at afterConnect (net.js:883:10) 2014-10-22T09:30:31.330676223Z --------------------------------------------- 2014-10-22T09:30:31.330676223Z at Socket.connect (net.js:800:10) 2014-10-22T09:30:31.330676223Z at exports.connect.exports.createConnection (net.js:94:35) 2014-10-22T09:30:31.330676223Z at connectStream (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:134:27) 2014-10-22T09:30:31.330676223Z at CleartextStream. (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:176:15) 2014-10-22T09:30:31.330676223Z at EventEmitter.emit (events.js:117:20) 2014-10-22T09:30:31.330676223Z at _stream_readable.js:920:16 2014-10-22T09:30:31.330676223Z --------------------------------------------- 2014-10-22T09:30:31.330676223Z at Readable.on (_stream_readable.js:689:33) 2014-10-22T09:30:31.330676223Z at Socket. (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:175:23) 2014-10-22T09:30:31.330676223Z at g (events.js:180:16) 2014-10-22T09:30:31.330676223Z at EventEmitter.emit (events.js:92:17) 2014-10-22T09:30:31.330676223Z at afterConnect (net.js:883:10) 2014-10-22T09:30:31.330676223Z --------------------------------------------- 2014-10-22T09:30:31.330676223Z at Socket.connect (net.js:800:10) 2014-10-22T09:30:31.330676223Z at exports.connect.exports.createConnection (net.js:94:35) 2014-10-22T09:30:31.330676223Z at connectStream (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:134:27) 2014-10-22T09:30:31.330676223Z at CleartextStream. (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:176:15) 2014-10-22T09:30:31.330676223Z at EventEmitter.emit (events.js:117:20) 2014-10-22T09:30:31.330676223Z at _stream_readable.js:920:16 2014-10-22T09:30:31.330676223Z --------------------------------------------- 2014-10-22T09:30:31.330676223Z at Readable.on (_stream_readable.js:689:33) 2014-10-22T09:30:31.330676223Z at Socket. (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:175:23) 2014-10-22T09:30:31.330676223Z at g (events.js:180:16) 2014-10-22T09:30:31.330676223Z at EventEmitter.emit (events.js:92:17) 2014-10-22T09:30:31.330676223Z at afterConnect (net.js:883:10) 2014-10-22T09:30:31.330676223Z --------------------------------------------- 2014-10-22T09:30:31.330676223Z at Socket.connect (net.js:800:10) 2014-10-22T09:30:31.330676223Z at exports.connect.exports.createConnection (net.js:94:35) 2014-10-22T09:30:31.330676223Z at connectStream (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:134:27) 2014-10-22T09:30:31.330676223Z at CleartextStream. (/src/node_modules/winston-papertrail/lib/winston-papertrail.js:176:15) 2014-10-22T09:30:31.330676223Z at EventEmitter.emit (events.js:117:20) 2014-10-22T09:30:31.330676223Z at _stream_readable.js:920:16 2014-10-22T09:30:31.330676223Z ---------------------------------------------

[kenperkins]

I've seen that in other code (external to winston-papertrail), but it's possible that it's a result of not doing something correct. I'll dive into it.

[joula]

Getting the same error sometimes, however don't know the exact payload of the logger which causes this error. It seems that some big payload could cause it.