Bad Gateway , 500 Internal Server Error

[Eberx]

Hello,

One thing happen on my website. When I requesting submit.php file then I
got 500 Internal Server Error but sometimes Bad Gateway message
appeared. I'm trying to debug this file. I guess this message may the
following Resource temporarily unavailable message cause of I was saw
500 or bad gateway message. 


2010/11/20 18:57:35 [debug] 4113#0: posted event 0000000001D9BD28
2010/11/20 18:57:35 [debug] 4113#0: *321 delete posted event
0000000001D9BD28
2010/11/20 18:57:35 [debug] 4113#0: *321 http run request:
"/modules/files/submit.php?"
2010/11/20 18:57:35 [debug] 4113#0: *321 http upstream check client,
write event:1, "/modules/files/submit.php"
2010/11/20 18:57:35 [debug] 4113#0: *321 http upstream recv(): -1 (11:
Resource temporarily unavailable)
2010/11/20 18:57:35 [debug] 4113#0: posted event 0000000000000000
2010/11/20 18:57:35 [debug] 4113#0: worker cycle
2010/11/20 18:57:35 [debug] 4113#0: accept mutex locked
2010/11/20 18:57:35 [debug] 4113#0: epoll timer: 1086
2010/11/20 18:57:35 [debug] 4116#0: timer delta: 500

Note. other .php file on my server fine. What is the cause ?

Sincerely,
Eberx

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,152044,152044#msg-152044