Meu site parou de ser carregado no navegador e funcionou novamente logo depois que reiniciei o apache2.
Eu uso o servidor do Amazon AWS ububuntu movido de t2.micro para t2.large (vCPU: 2, Créditos de CPU / hora: 36, Mem (GiB) 8) há 3 meses.
Este é o log do apache2:
[Tue Dec 15 09:04:41.976924 2015] [autoindex:error] [pid 31049] [client 66.66.66.666:53331] AH01276: Cannot serve directory /var/www/html/wp-content/themes/twentyfifteen-child/images/: No matching DirectoryIndex (index.html,index.cgi,index.pl,index.php,index.xhtml,index.htm) found, and server-generated directory index forbidden by Options directive, referer: http://www.example.com/blog/
[Tue Dec 15 18:28:59.565037 2015] [autoindex:error] [pid 31987] [client 50.115.68.210:13697] AH01276: Cannot serve directory /var/www/html/wp-content/themes/twentyfifteen-child/images/: No matching DirectoryIndex (index.html,index.cgi,index.pl,index.php,index.xhtml,index.htm) found, and server-generated directory index forbidden by Options directive, referer: http://www.example.com/wp-content/themes/twentyfifteen-child/style.css?ver=4.3.1
[Wed Dec 16 02:34:52.643069 2015] [mpm_prefork:error] [pid 27704] AH00161: server reached MaxRequestWorkers setting, consider raising the MaxRequestWorkers setting
[Wed Dec 16 10:40:04.422974 2015] [core:notice] [pid 27704] AH00051: child pid 28345 exit signal Segmentation fault (11), possible coredump in /etc/apache2
[Wed Dec 16 10:40:04.423039 2015] [core:notice] [pid 27704] AH00051: child pid 28512 exit signal Segmentation fault (11), possible coredump in /etc/apache2
[Wed Dec 16 10:40:04.423089 2015] [core:notice] [pid 27704] AH00051: child pid 28347 exit signal Segmentation fault (11), possible coredump in /etc/apache2
[Wed Dec 16 10:40:04.423174 2015] [core:notice] [pid 27704] AH00051: child pid 27850 exit signal Segmentation fault (11), possible coredump in /etc/apache2
[Wed Dec 16 10:40:04.423220 2015] [core:notice] [pid 27704] AH00051: child pid 13545 exit signal Segmentation fault (11), possible coredump in /etc/apache2
[Wed Dec 16 10:40:04.423259 2015] [core:notice] [pid 27704] AH00051: child pid 31810 exit signal Segmentation fault (11), possible coredump in /etc/apache2
[Wed Dec 16 10:40:04.423297 2015] [core:notice] [pid 27704] AH00051: child pid 28520 exit signal Segmentation fault (11), possible coredump in /etc/apache2
O problema realmente começou por volta das 10:40 (você pode ver no log)
E este é o MaxRequestWorkers .
<IfModule mpm_prefork_module>
StartServers 5
MinSpareServers 5
MaxSpareServers 10
MaxRequestWorkers 256
MaxConnectionsPerChild 1000
</IfModule>
Alguém pode me ajudar a depurar o problema no meu servidor?
qual pode ser o problema?
EDITAR:
Saída GBD:
(gdb) gdb apache2 -core /tmp/apache-coredumps/core
[1]+ Stopped gdb /usr/sbin/apache2
root@ip-66-66-66-66:/# db apache2 -core /tmp/apache-coredumps/core
db: command not found
root@ip-66-66-66-66:/# gdb apache2 -core /tmp/apache-coredumps/core
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from apache2...Reading symbols from /usr/lib/debug//usr/sbin/apache2...done.
done.
[New LWP 6194]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/mysql.so" does not match "/usr/lib/php5/20121212/mysql.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/mysql.so" does not match "/usr/lib/php5/20121212/mysql.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/mysqli.so" does not match "/usr/lib/php5/20121212/mysqli.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/mysqli.so" does not match "/usr/lib/php5/20121212/mysqli.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug//usr/lib/php5/20121212/pdo_mysql.so" does not match "/usr/lib/php5/20121212/pdo_mysql.so" (CRC mismatch).
warning: the debug information found in "/usr/lib/debug/usr/lib/php5/20121212/pdo_mysql.so" does not match "/usr/lib/php5/20121212/pdo_mysql.so" (CRC mismatch).
Core was generated by '/usr/sbin/apache2 -k start'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 _zend_mm_free_int (heap=0x7f4b910ecfb0, p=0x7f4b910f0e70) at /build/php5-pO28mL/php5-5.5.9+dfsg/Zend/zend_alloc.c:2104
2104 /build/php5-pO28mL/php5-5.5.9+dfsg/Zend/zend_alloc.c: No such file or directory.
Seu servidor pode ter apenas uma sobrecarga simples. Eu não posso dizer, mesmo para um t2.micro, porque depende de muitos parâmetros.
Existem opções para evitar falhas como essas. Um dos mais simples é instalar Monit . Este é um serviço que pode monitorar o Apache e, em seguida, reiniciá-lo se ele perceber que há muitas conexões. Você pode usar o Monit para outros processos também.
[core:notice] [pid 27704] AH00051: child pid 28345 exit signal Segmentation fault (11), possible coredump in /etc/apache2
Parece que seu aplicativo pode ter um bug. Você pode anexar o gdb a um dos processos e esperar que ele caia novamente, em seguida, pegue um backtrace e trabalhe de lá .
Você também pode procurar em outros registros para ver se há alguma informação relevante correlacionada que possa ajudar a rastrear o problema.
Tags apache-2.2 ubuntu max-requests