HTTP request sent, awaiting response ... 404 Not Found

Background:

A date in the data Escalation task, appears: "HTTP request sent, awaiting response ... 404 Not Found "exception.
The logs are as follows:
Task id:xxxx start execution, execute command: edw/etl/xx.py 125_yyyymmdd_done.txt wireless_order_deal_5min
--2015-02-27 08:56:09--Http://172.xx.xx.xx/wireless_order_deal_5min/125_20150226_done.txt
Connecting to 172.xx.xx.xx: 80 ... Connected.
HTTP request sent, awaiting response ... 404 Not Found
2015-02-27 08:56:09 ERROR 404:not Found.

A, the results of the search through the fortress machine are as follows:

Initial judgment, the other party (b) file does not exist or service exception.

Problem feedback to B, b through the Fortress machine query results are as follows:

The other side feedback local everything is OK.

Problem Analysis:

Such cases may be caused by service changes, configuration files, network, and so on.

Workaround:

Finally locate the other side (b) of the Nginx service is stopped by mistake, and finally re-restart the Nginx service, that is, to solve the problem.

HTTP request sent, awaiting response ... 404 Not Found