#22452 [Opn->Fbk]: Background script stalls after 300 seconds

ID: 22452 Updated by: iliaa@php.net Reported By: mikan at playcollective dot com -Status: Open +Status: Feedback Bug Type: Scripting Engine problem Operating System: Linux (RedHat 7.2) PHP Version: 4.3.0 New Comment: Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip Previous Comments: ------------------------------------------------------------------------ [2003-02-27 05:50:07] mikan at playcollective dot com I've been developping a daemon-script that runs in the background, after being spawned from the parent script. i use an: // we are parent. spawn child and exit. $sock = fsockopen (getenv("SERVER_NAME"), 80); if(!$sock){ echo "ERROR: $errstr ($errno)\n"; } else { if(socket_set_blocking($sock, false)){ fputs($sock, "GET ".getenv("REQUEST_URI")."?child=1 HTTP/1.1\n"); fputs($sock, "Host: ".getenv("SERVER_NAME")." \n"); fputs($sock, "Connection: close\n\n"); fclose($sock); } else { echo "ERROR: blocking socket. execution halted.\n"; exit(); } } to spawn the child process (fork is not supported on the system this script is developed for). this code essentially opens a non-blocking socket to itself, with the variable child=1, and exits. the child process is now running. this child process starts with: set_time_limit (0); ignore_user_abort(true); to be able to run "forever"... after this it goes into an eternal while loop. now, the problem is the following: if nothing happens within the loop (e.g. no output is produced, the script only checks and sleeps) the script halts (but doesn't die/exit) after exactly 300 seconds. the process still exists in the process list on the server. if the script produces an non-fatal error within every 300 seconds, it continues running happily for hours and hours and hours. i tried outputting a "boo" message using echo "boo"; every ten seconds, and that didn't seem to work. i tried flushing after echoing, that didn't work either. now i free a mysql-result that doesn't exist, and that DOES work! ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=22452&edit=1