getting connection lost issue

[phpdev-ed]

I've integrated this on my local machine and when I tried to run ca_walmart spider in terminal. I'm getting below error.

Command in terminal: scrapy crawl ca_walmart
twisted.web._newclient.ResponseNeverReceived: [<twisted.python.failure.Failure twisted.internet.error.ConnectionLost: Connection to the other side was lost in a non-clean fashion: Connection lost.>]

Do you have any solution for this?

Thanks