title: my nodejs script is not exiting on its own after successful execution
body: <p>I have written a script to update my db table after reading data from db tables and solr. I am using asyn.waterfall module. The problem is that the script is not getting exited after successful completion of all operations. I have used db connection pool also thinking that may be creating the script to wait infinitly.
  I want to put this script in crontab and if it will not exit properly it would be creating a hell lot of instances unnecessarily.</p>