502-php Phalcon Frame 502 Bad Gateway error, Nginx environment

If it is simply echo ' Hello World '; Words can be normal access, the use of Phalcon is not, do not know how to go, help.
Php-fpm.log always appears with the following hint:

[16-may-2015 19:08:58] NOTICE: [Pool www] child 28875 started
[16-may-2015 19:09:00] WARNING: [Pool www] child 28870 exited on signal one (Sigsegv-core dumped) after 3.975894 seconds from start
[16-may-2015 19:09:00] NOTICE: [Pool www] child 28878 started
[16-may-2015 19:09:02] WARNING: [Pool www] child 28875 exited on signal one (Sigsegv-core dumped) after 4.456202 seconds from start
[16-may-2015 19:09:02] NOTICE: [Pool www] child 28880 started
[16-may-2015 19:10:20] WARNING: [Pool www] child 28878 exited on signal one (Sigsegv-core dumped) after 80.234199 seconds from start
[16-may-2015 19:10:20] NOTICE: [Pool www] child 28896 started
[16-may-2015 19:10:27] WARNING: [Pool www] child 28880 exited on signal one (Sigsegv-core dumped) after 84.586972 seconds from start
[16-may-2015 19:10:27] NOTICE: [Pool www] child 28902 started
[16-may-2015 19:33:08] WARNING: [Pool www] child 28902 exited on signal one (Sigsegv-core dumped) after 1361.414055 seconds from start
[16-may-2015 19:33:08] NOTICE: [Pool www] child 29351 started

Nginx Error

015/05/16 19:10:27 [ERROR] 27803#0: *214 recv () failed (104:connection reset by peer) and reading response header from Upstream, client:192.168.153.1, server:www.codebaa.com, Request: "Get/favicon.ico http/1.1", Upstream: "fastcgi:// Unix:/var/run/php-fpm/php-fastcgi.socket: ", Host:" Www.codebaa.com ", referrer:" Http://www.codebaa.com/ajax/test/test "

2015/05/16 19:33:08 [ERROR] 27803#0: *218 recv () failed (104:connection reset by peer) and reading response header from Upstream, client:192.168.153.1, server:www.codebaa.com, Request: "Get/favicon.ico http/1.1", Upstream: "Fastcgi://uni X:/var/run/php-fpm/php-fastcgi.socket: ", Host:" Www.codebaa.com ", referrer:" Http://www.codebaa.com/ajax/test/test "

Reply content:

If it is simply echo ' Hello World '; Words can be normal access, the use of Phalcon is not, do not know how to go, help.
Php-fpm.log always appears with the following hint:

[16-may-2015 19:08:58] NOTICE: [Pool www] child 28875 started
[16-may-2015 19:09:00] WARNING: [Pool www] child 28870 exited on signal one (Sigsegv-core dumped) after 3.975894 seconds from start
[16-may-2015 19:09:00] NOTICE: [Pool www] child 28878 started
[16-may-2015 19:09:02] WARNING: [Pool www] child 28875 exited on signal one (Sigsegv-core dumped) after 4.456202 seconds from start
[16-may-2015 19:09:02] NOTICE: [Pool www] child 28880 started
[16-may-2015 19:10:20] WARNING: [Pool www] child 28878 exited on signal one (Sigsegv-core dumped) after 80.234199 seconds from start
[16-may-2015 19:10:20] NOTICE: [Pool www] child 28896 started
[16-may-2015 19:10:27] WARNING: [Pool www] child 28880 exited on signal one (Sigsegv-core dumped) after 84.586972 seconds from start
[16-may-2015 19:10:27] NOTICE: [Pool www] child 28902 started
[16-may-2015 19:33:08] WARNING: [Pool www] child 28902 exited on signal one (Sigsegv-core dumped) after 1361.414055 seconds from start
[16-may-2015 19:33:08] NOTICE: [Pool www] child 29351 started

Nginx Error

015/05/16 19:10:27 [ERROR] 27803#0: *214 recv () failed (104:connection reset by peer) and reading response header from Upstream, client:192.168.153.1, server:www.codebaa.com, Request: "Get/favicon.ico http/1.1", Upstream: "fastcgi:// Unix:/var/run/php-fpm/php-fastcgi.socket: ", Host:" Www.codebaa.com ", referrer:" Http://www.codebaa.com/ajax/test/test "

2015/05/16 19:33:08 [ERROR] 27803#0: *218 recv () failed (104:connection reset by peer) and reading response header from Upstream, client:192.168.153.1, server:www.codebaa.com, Request: "Get/favicon.ico http/1.1", Upstream: "Fastcgi://uni X:/var/run/php-fpm/php-fastcgi.socket: ", Host:" Www.codebaa.com ", referrer:" Http://www.codebaa.com/ajax/test/test "

If Opcache is installed, try disabling it first.

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