HTTP 404 Error from localhost

We may find the following log lines appearing in logging, with several characteristics:

1. HTTP Status: 404

2. HTTP Method: DELETE

3. $server_addr and $remote_addr: 127.0.0.1

Feb 22 22:30:26 1.2.3.60 nginx 22/Feb/2016:22:30:25 +0000 1324 127.0.0.1 DELETE sample.r.worldssl.net /test.jpg 404 397 - 0.000 0.000 18000 2324 3334 sample.r.worldssl.net 127.0.0.1 - - - V6
Feb 22 22:30:26 1.2.3.60 nginx 22/Feb/2016:22:30:25 +0000 1324 127.0.0.1 DELETE sample.r.worldssl.net /test.jpg 404 397 - 0.000 0.000 18000 2324 3334 sample.r.worldssl.net 127.0.0.1 - - - V6

You may these errors as they are result of invalid purging owing to cache not found.