This code will memory leak, if you restart redis server when the node process is running

demo-memleak.js

/**
 * This code will memory leak, if you restart redis server when the node process is running
 * 
 * @author Gui Lin
 */
var redis = require('redis').createClient();

setInterval(function(){

  redis.multi()
    .zrangebyscore('timeup', 0, Date.now())
    .zremrangebyscore('timeup', 0, Date.now())
    .exec(function(err, data) {
          if(err) console.log(err.stack);
          if(data) data = data[0];
      });
}, 1);

process.on('uncaughtException', function(err) {
    console.log(err.stack);
})