From: Operating system: Linux PHP version: 5.4SVN-2012-02-14 (SVN) Package: Scripting Engine problem Bug Type: Bug Bug description:Apache/mod_php ignores SIGHUP
Description: ------------ Test Case --------- 1) Just start Apache with mod_php 2) generate some load (e.g. ab -t 120 http://.../hello.php) 3) run 'apachectl restart' for few times 4) 'apachectl stop' 5) Check Apache error_log You will see warning and error messages: [warn] child process 15317 still did not exit, sending a SIGTERM [error] child process 15317 still did not exit, sending a SIGKILL The reason of these errors is the fact that Apache/mod_php worker processws ignore SIGHIP and the main Apache process kills them using SIGTERM or SIGKILL. I tried to analyze and debug zend_signal.c and found very wired behavior. On first request zend_signal_activate() sets its own signal handler for SIGHUP and stores the original handler in SIGG(handlers)[SIGHUP-1].handler, but on second request the same zend_signal_activate() overwrites the original signal handler by handler from parent process. zend_signal.c:284 memcpy(&SIGG(handlers), &global_orig_handlers, sizeof(global_orig_handlers)); As result the original signal handler for SIGHUP is never called. Even worse after restart and two request SIGG(handlers)[SIGHUP-1].handler becomes SIG_IGN and SIGHUP is ignored at all. -- Edit bug report at https://bugs.php.net/bug.php?id=61083&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=61083&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=61083&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=61083&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=61083&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61083&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=61083&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=61083&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=61083&r=needscript Try newer version: https://bugs.php.net/fix.php?id=61083&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=61083&r=support Expected behavior: https://bugs.php.net/fix.php?id=61083&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=61083&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=61083&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=61083&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=61083&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=61083&r=dst IIS Stability: https://bugs.php.net/fix.php?id=61083&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=61083&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=61083&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=61083&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=61083&r=mysqlcfg
