提问人：Programmer 提问时间：12/21/2012 更新时间：2/14/2013 访问量：20784
NodeJS：警告：检测到可能的 EventEmitter 内存泄漏。添加了 11 位听众。使用 emitter.setMaxListeners（） 增加限制
NodeJS : warning: possible EventEmitter memory leak detected. 11 listeners added. Use emitter.setMaxListeners() to increase limit
问：
我有以下代码：
var schild = spawn('script.sh', ["process1", "process2"]);
schild.stderr.on('data', function (data) {
logger.info('stderr: ' + data);
});
schild.on('exit', function (code) {
logger.info('child process exited with code ' + code);
});
schild.stdout.on('data', function (data) {
logger.info('Data ' + data);
});
当我运行代码时，出现以下错误：
(node) warning: possible EventEmitter memory leak detected. 11 listeners added. Use emitter.setMaxListeners() to increase limit.
Trace
at EventEmitter.addListener (events.js:175:15)
at EventEmitter.once (events.js:196:8)
at Transport.logException (/x/home/prakash/src/node_modules/winston/lib/winston/transports/transport.js:118:8)
at logAndWait (/x/home/prakash/src/node_modules/winston/lib/winston/logger.js:613:15)
at async.forEach (/x/home/prakash/src/node_modules/winston/node_modules/async/lib/async.js:86:13)
at Array.forEach (native)
at _forEach (/x/home/prakash/src/node_modules/winston/node_modules/async/lib/async.js:26:24)
at Object.async.forEach (/x/home/prakash/src/node_modules/winston/node_modules/async/lib/async.js:85:9)
at Logger._uncaughtException (/x/home/prakash/src/node_modules/winston/lib/winston/logger.js:636:9)
at process.EventEmitter.emit (events.js:126:20)
(node) warning: possible EventEmitter memory leak detected. 11 listeners added. Use emitter.setMaxListeners() to increase limit.
Trace
at EventEmitter.addListener (events.js:175:15)
at EventEmitter.once (events.js:196:8)
at Transport.logException (/x/home/prakash/src/node_modules/winston/lib/winston/transports/transport.js:117:8)
at logAndWait (/x/home/prakash/src/node_modules/winston/lib/winston/logger.js:613:15)
at async.forEach (/x/home/prakash/src/node_modules/winston/node_modules/async/lib/async.js:86:13)
at Array.forEach (native)
at _forEach (/x/home/prakash/src/node_modules/winston/node_modules/async/lib/async.js:26:24)
at Object.async.forEach (/x/home/prakash/src/node_modules/winston/node_modules/async/lib/async.js:85:9)
at Logger._uncaughtException (/x/home/prakash/src/node_modules/winston/lib/winston/logger.js:636:9)
at process.EventEmitter.emit (events.js:126:20)
答：
5赞
LuisCien
2/14/2013
#1
我相信问题在于，当你不再需要它们时，你不会删除它们。完成操作后，您需要使用 'schild.removeListener（'exit'， function）' 或 'schild.removeAllListeners（'exit'）'。
请参见：http://nodejs.org/api/events.html#events_emitter_removelistener_event_listener
当然，在某些情况下，您需要拥有 10 个以上的侦听器，在这种情况下，您应该使用 'schild.setMaxListeners（0）'（0 表示无限制）
请参见：http://nodejs.org/api/events.html#events_emitter_setmaxlisteners_n
希望对您有所帮助！
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