node.js杀死僵尸进程

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var cluster = require('cluster');
var http = require('http');
var numCPUs = require('os').cpus().length;
var rssWarn = (50* 1024* 1024),
heapWarn = (50* 1024* 1024);

var workers = {};
if (cluster.isMaster) {
for (var i= 0; i< numCPUs; i++) {
createWorker();
};
setInterval(function() {
var time= newDate().getTime()
for (pidin workers) {
if (workers.hasOwnProperty(pid)&&
workers[pid].lastCb+ 5000< time) {
console.log('Long running worker '+ pid + ' killed')
workers[pid].worker.kill()
delete workers[pid]
createWorker();
}
}
}, 1000)
} else {
// 服务器
http.Server(function(req,res) {
// 打乱 200 个请求中的 1 个
if (Math.floor(Math.random()* 200)=== 4) {
console.log('Stopped '+ process.pid+ ' from ever finishing')
while (true) {continue }
}
res.writeHead(200);
res.end('hello world from '+ process.pid+ '\n')
}).listen(8000)
// 每秒钟报告一次状态
setInterval(functionreport() {
process.send({
cmd:"reportMem",
memory:process.memoryUsage(),
process:process.pid
})
}, 1000)
};

function createWorker() {
var worker= cluster.fork()
console.log('Created worker: '+ worker.pid)
// 允许开机时间
workers[worker.pid]= { worker: worker, lastCb:new Date().getTime()- 1000 }
worker.on('message',function(m) {
if (m.cmd=== "reportMem") {
workers[m.process].lastCb= newDate().getTime()
if (m.memory.rss> rssWarn) {
console.log('Worker '+ m.process+ ' using too much memory.')
}
}
})
};
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