Bug #63395 [NEW]: Spawned processes do not perform

From: Alex at phpguide dot co dot il Operating system: Ubuntu 12.04 x64 PHP version: 5.4.8 Package: FPM related Bug Type: Bug Bug description:Spawned processes do not perform Description: ------------ I'm running nginx 1.2.4 with php5-fpm (5.4.8) issuing ab -n 20000 -c 1000 http://localhost/index.php When pm = dynamic pm.max_children = 3000 pm.start_servers = 100 <- this is important pm.max_spare_servers = 1000 I'm having a lot of errors in nginx talking to php [error] 26125#0: *49177 upstream prematurely closed connection while reading response header from upstream, ... "fastcgi://127.0.0.1:9000" [error] 26125#0: *56030 recv() failed (104: Connection reset by peer) while reading response header from upstream, ... upstream: "fastcgi://127.0.0.1:9000" The fpm log shows a lot of WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 32 children, there are 0 idle, and X total children When spawning new children reaches a concrete amount nginx stops issuing such errors. This leads me to believe freshly spawned processes do not execute and respond correctly. Now, when I start with 3000 children straight ahead, all connections work properly. No errors in nginx or fpm. pm = dynamic pm.max_children = 3000 pm.start_servers = 3000 <- Straight ahead pm.max_spare_servers = 3000 Test script: --------------- The php code on the server is relatively simple. apc_inc('count111'); sleep(1); echo 'x'; -- Edit bug report at https://bugs.php.net/bug.php?id=63395&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=63395&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=63395&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=63395&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=63395&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=63395&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=63395&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=63395&r=needscript Try newer version: https://bugs.php.net/fix.php?id=63395&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=63395&r=support Expected behavior: https://bugs.php.net/fix.php?id=63395&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=63395&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=63395&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=63395&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=63395&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=63395&r=dst IIS Stability: https://bugs.php.net/fix.php?id=63395&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=63395&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=63395&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=63395&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=63395&r=mysqlcfg