请教如何分析php-fpm.log？系统出问题了。

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系统出问题，ssh和ftp都可以登陆，但是网站打不开，总是502错误，
看了一下php-fpm.log，找不出原因希望高手能指点下，感谢！


Feb 15 11:51:42.971004 [NOTICE] fpm_children_make(), line 352: child 8831 (pool default) started
Feb 15 11:51:42.971095 [WARNING] fpm_stdio_child_said(), line 167: child 8831 (pool default) said into stderr: "Feb 15 11:51:42.963441 [ERROR] fpm_unix_init_child(), line 168: setrlimit(RLIMIT_NOFILE) failed: Invalid argument (22)"
Feb 15 11:51:45.335863 [WARNING] fpm_request_check_timed_out(), line 158: child 8730, script '/home/wwwroot/you.qingdiao.com/do.php' (pool default) execution timed out (60.086367 sec), terminating
Feb 15 11:51:45.340145 [NOTICE] fpm_got_signal(), line 48: received SIGCHLD
Feb 15 11:51:45.340196 [WARNING] fpm_children_bury(), line 215: child 8730 (pool default) exited on signal 15 SIGTERM after 118.689756 seconds from start
Feb 15 11:51:45.351206 [NOTICE] fpm_children_make(), line 352: child 8834 (pool default) started
Feb 15 11:51:45.351299 [WARNING] fpm_stdio_child_said(), line 167: child 8834 (pool default) said into stderr: "Feb 15 11:51:45.341322 [ERROR] fpm_unix_init_child(), line 168: setrlimit(RLIMIT_NOFILE) failed: Invalid argument (22)"
Feb 15 11:51:50.096165 [WARNING] fpm_request_check_timed_out(), line 158: child 8791, script '/home/wwwroot/you.qingdiao.com/do.php' (pool default) execution timed out (60.067138 sec), terminating
Feb 15 11:51:50.097908 [NOTICE] fpm_got_signal(), line 48: received SIGCHLD
Feb 15 11:51:50.097963 [WARNING] fpm_children_bury(), line 215: child 8791 (pool default) exited on signal 15 SIGTERM after 60.060051 seconds from start
Feb 15 11:51:50.108799 [NOTICE] fpm_children_make(), line 352: child 8847 (pool default) started
Feb 15 11:51:50.108871 [WARNING] fpm_stdio_child_said(), line 167: child 8847 (pool default) said into stderr: "Feb 15 11:51:50.099004 [ERROR] fpm_unix_init_child(), line 168: setrlimit(RLIMIT_NOFILE) failed: Invalid argument (22)"
Feb 15 11:52:01.316874 [WARNING] fpm_request_check_timed_out(), line 158: child 8793, script '/home/wwwroot/you.qingdiao.com/do.php' (pool default) execution timed out (60.000934 sec), terminating
Feb 15 11:52:01.319047 [NOTICE] fpm_got_signal(), line 48: received SIGCHLD
Feb 15 11:52:01.319088 [WARNING] fpm_children_bury(), line 215: child 8793 (pool default) exited on signal 15 SIGTERM after 61.122767 seconds from start
Feb 15 11:52:01.320869 [NOTICE] fpm_children_make(), line 352: child 8896 (pool default) started
Feb 15 11:52:01.320921 [WARNING] fpm_stdio_child_said(), line 167: child 8896 (pool default) said into stderr: "Feb 15 11:52:01.320044 [ERROR] fpm_unix_init_child(), line 168: setrlimit(RLIMIT_NOFILE) failed: Invalid argument (22)"
Feb 15 11:52:42.371457 [WARNING] fpm_request_check_timed_out(), line 158: child 8824, script '/home/wwwroot/you.qingdiao.com/space.php' (pool default) execution timed out (60.011628 sec), terminating
Feb 15 11:52:42.373679 [NOTICE] fpm_got_signal(), line 48: received SIGCHLD
Feb 15 11:52:42.373728 [WARNING] fpm_children_bury(), line 215: child 8824 (pool default) exited on signal 15 SIGTERM after 62.698514 seconds from start

licess

修改/usr/local/php/etc/php-fpm.conf 里的rlimit_files为65535 重启试试