First request after nginx restart is not served

[Deleted user]

It seems that the first nginx request after nginx initialization or restart is not served by S3 due to signature mismatch. The problem is probably caused by missing timestamp in string_to_sign even though x-amz-date header is present.
Debug log for the very first request after start or restart

2014/03/28 20:02:20 [debug] 31823#0: *1 start normalize headers
2014/03/28 20:02:20 [debug] 31823#0: *1 normalized: 
2014/03/28 20:02:20 [debug] 31823#0: *1 bucket: mybucket
2014/03/28 20:02:20 [debug] 31823#0: *1 uri:    /backup/amazon/review01.txt
2014/03/28 20:02:20 [debug] 31823#0: *1 normalized resources: /mybucket/backup/amazon/review01.txt
2014/03/28 20:02:20 [debug] 31823#0: *1 String to sign:GET



/mybucket/backup/amazon/review01.txt
2014/03/28 20:02:20 [debug] 31823#0: *1 aws string being signed BEGIN:
GET



/mybucket/backup/amazon/review01.txt
aws string being signed END
2014/03/28 20:02:20 [debug] 31823#0: *1 Signature: AWS AKIAICP2LJG6EZD7V62Q:hZlFkPilKWyG023B0WctzIB1Q38=
2014/03/28 20:02:20 [debug] 31823#0: *1 posix_memalign: 09CB86E0:4096 @16
2014/03/28 20:02:20 [debug] 31823#0: *1 http script copy: "Authorization: "
2014/03/28 20:02:20 [debug] 31823#0: *1 http script var: "AWS AKIAICP2LJG6EZD7V62Q:hZlFkPilKWyG023B0WctzIB1Q38="
2014/03/28 20:02:20 [debug] 31823#0: *1 http script copy: "
"
2014/03/28 20:02:20 [debug] 31823#0: *1 http script copy: "x-amz-date: "
2014/03/28 20:02:20 [debug] 31823#0: *1 http script var: "Fri, 28 Mar 2014 18:02:20 GMT"
2014/03/28 20:02:20 [debug] 31823#0: *1 http script copy: "
"
2014/03/28 20:02:20 [debug] 31823#0: *1 http script copy: "Host: "
2014/03/28 20:02:20 [debug] 31823#0: *1 http script var: "mybucket.s3.amazonaws.com"
2014/03/28 20:02:20 [debug] 31823#0: *1 http script copy: "
"
2014/03/28 20:02:20 [debug] 31823#0: *1 http script copy: "Connection: close
"

Each subsequent request includes the correct timestamp from x-amz-date header

2014/03/28 20:13:59 [debug] 31823#0: *17 start normalize headers
2014/03/28 20:13:59 [debug] 31823#0: *17 normalized: x-amz-date:Fri, 28 Mar 2014 18:13:59 GMT

2014/03/28 20:13:59 [debug] 31823#0: *17 bucket: mybucket
2014/03/28 20:13:59 [debug] 31823#0: *17 uri:    /backup/amazon/review01.txt
2014/03/28 20:13:59 [debug] 31823#0: *17 normalized resources: /mybucket/backup/amazon/review01.txt
2014/03/28 20:13:59 [debug] 31823#0: *17 String to sign:GET



x-amz-date:Fri, 28 Mar 2014 18:13:59 GMT
/mybucket/backup/amazon/review01.txt
2014/03/28 20:13:59 [debug] 31823#0: *17 aws string being signed BEGIN:
GET



x-amz-date:Fri, 28 Mar 2014 18:13:59 GMT
/mybucket/backup/amazon/review01.txt
aws string being signed END
2014/03/28 20:13:59 [debug] 31823#0: *17 Signature: AWS AKIAICP2LJG6EZD7V62Q:d/q/UjFsoSxNHtJhQCFUfGUFOwo=
2014/03/28 20:13:59 [debug] 31823#0: *17 posix_memalign: 09CB7FA0:4096 @16
2014/03/28 20:13:59 [debug] 31823#0: *17 http script copy: "Authorization: "
2014/03/28 20:13:59 [debug] 31823#0: *17 http script var: "AWS AKIAICP2LJG6EZD7V62Q:d/q/UjFsoSxNHtJhQCFUfGUFOwo="
2014/03/28 20:13:59 [debug] 31823#0: *17 http script copy: "
"
2014/03/28 20:13:59 [debug] 31823#0: *17 http script copy: "x-amz-date: "
2014/03/28 20:13:59 [debug] 31823#0: *17 http script var: "Fri, 28 Mar 2014 18:13:59 GMT"
2014/03/28 20:13:59 [debug] 31823#0: *17 http script copy: "
"
2014/03/28 20:13:59 [debug] 31823#0: *17 http script copy: "Host: "
2014/03/28 20:13:59 [debug] 31823#0: *17 http script var: "mybucket.s3.amazonaws.com"
2014/03/28 20:13:59 [debug] 31823#0: *17 http script copy: "
"
2014/03/28 20:13:59 [debug] 31823#0: *17 http script copy: "Connection: close
"

[orykami]

I have exactly the same problem ... Any idea ?