Bug #12700: 502 Gateway Error/Failed to Return Headers

From: paul.burden@kingproducts.com Operating system: Windows 2000 Server PHP version: 4.0.6 PHP Bug Type: IIS related Bug description: 502 Gateway Error/Failed to Return Headers I have installed and setup 4 different Windows 2000 Server Pro/Advanced machines with IIS, PHP 4.0.6, MSSQL Server 2000 and 7. All systems have variations in hardware configurations and performance, all of the systems have this identical problem. In the last 5 days there have been around 2000 site hits. IIS has logged 24 occurrences of a 504 Gateway error. And returns "CGI Failed to return headers". This error is *very* random. Out of the 35 .php documents, the error has occurred on 6. These 6 are also the most frequently requested documents on the server. These documents are otherwise error free. Its not too hard to recreate the error. Several repeated requests of the same document that performs database requests will generate the error. To me, it seems *completely* random. I have setup IIS to point to a document that causes a page refresh on a 502 error. The refresh action re-posts the page and the page will display correctly. This is a critical problem for me. I have modified the IIS 502 error report document reload and resubmit the page that generated the error. The only way I can re-create the crash is by hitting the same page "UserDetail.php" 10 times in 10 seconds. The 10th request generated a "502 gateway error". NOTE: Crash still happens during normal activity as well. IIS Logs: 200 Mozilla/4.0+(compatible;+MSIE+5.5;+Windows+NT+4.0) 2001-07-11 19:25:17 205.150.207.2 - 205.150.207.20 80 GET /directory/UserDetail.php SID=f2b31876e1822c10425ea4e1d13c01f3&FriendStatusChange=1&UserToView=5&Search=3 200 Mozilla/4.0+(compatible;+MSIE+5.5;+Windows+NT+4.0) 2001-07-11 19:25:18 205.150.207.2 - 205.150.207.20 80 GET /directory/UserDetail.php SID=f2b31876e1822c10425ea4e1d13c01f3&FriendStatusChange=1&UserToView=5&Search=3 200 Mozilla/4.0+(compatible;+MSIE+5.5;+Windows+NT+4.0) 2001-07-11 19:25:18 205.150.207.2 - 205.150.207.20 80 GET /directory/UserDetail.php SID=f2b31876e1822c10425ea4e1d13c01f3&FriendStatusChange=1&UserToView=5&Search=3 200 Mozilla/4.0+(compatible;+MSIE+5.5;+Windows+NT+4.0) 2001-07-11 19:25:18 205.150.207.2 - 205.150.207.20 80 GET /directory/UserDetail.php SID=f2b31876e1822c10425ea4e1d13c01f3&FriendStatusChange=1&UserToView=5&Search=3 502 Mozilla/4.0+(compatible;+MSIE+5.5;+Windows+NT+4.0) ^^ note the 502 "Gateway error in the last line of the log. no backtrace, you have no instructions on how to capture this in win32? Thanks for your attention, - Paul -- Edit bug report at: http://bugs.php.net/?id=12700&edit=1