A simple script to monitor 502, and if it encounters 502, automatically restarts the PHP process. Suitable for LNMP environments.The following files are stored in/root or other directories:#!/bin/bashMY_URL="http://www.tarena.com.cn/"RESULT=`curl -I $MY_URL|grep"HTTP/1.1 502"`if[ -n "$RESULT"]; then/etc/init.d/php-fpm restartfiGive executable permission:chmod+x /
by the page consumption of our site may be too large.
On the Internet to find a solution, in the foreign site saw a way to increase the buffer, thoroughly solve the problem of Nginx 502 bad Gateway. The method is as follows:
HTTP {
...
Fastcgi_buffers 8 16k;
Fastcgi_buffer_size 32k;
...
}
Increase the above two configuration items by yourself, depending
processes" is close to the preset "fastcgi process", then the "fastcgi process count" is not sufficient and needs to be increased. But be careful to calculate whether your memory is enough to support more processes, if the physical machine memory is not large enough, it is useless to increase the number of processes.2, some of the PHP program execution time than the Nginx wait time, you can appropriately increase the nginx.conf configuration file fastcgi timeout time, as follows:http{......Fast
Php-cgi supported by php-fpmModify the php-fpm process count in/usr/local/php/etc/php-fpm.conf to find max_children and change the following value to the value you want to set.. The code is as follows:Copy code # Vim/usr/local/php/etc/php-fpm.conf # Max_children indicates the processing process of php-cgi. Setting max_children also needs to be set based on the server performance, increasing the number of processes and occupying memory.It will also increase accordingly. Under normal circumst
Nginx+php-fpm+mysql website, visit Nginx a page, reported 502 Gateway error, generally see this error, can judge is php-fpm problem, not nginx problem. By monitoring the Nginx error log, the following error is found:Upstream sent too big header while reading response headers from upstreamSolve this problem with Google:In nginx.conf the HTTP segment, add the following configuration:proxy_buffer_size 128k;pro
Win7 open Web page with browser three ways to 502 bad gateway errors
Method One, shutdown agent
1, the first may be our browser using the agent, we open the desktop browser to find the right corner of the tool open, in the Drop-down menu to find the proxy server option;
2, then in the pop-up Proxy server option, choose not to use the proxy option
There was a strange problem today when the form was submitted directly 502 bad gateway! Begin to suspect is a program problem, then check the program is normal, found that post field number is greater than 1000 when 502 bad Gateway
PHP thread open File handle limited error 502 bad Gateway
The resources on the Internet are basically considered to be errors caused by the limited opening of a file handle by a PHP thread. The specific solution is as follows:
?
1. Raise the file handle of the server open Open
/etc/security/limits.conf: (Increase)
* soft???????? 51200
*?????? nofile. 5120
There are 502 errors in php-cgi processes, long PHP execution time, or php-cgi process death.
1). Long PHP Execution Time
If the server performance is good enough and the broadband resources are sufficient, the PHP script does not have a loop or bug, you can set the "request_terminate_timeout" to 0s directly.PHP-FPM.CONF 103 lines Around
The code is as follows
Copy Code
The meaning of 0s is to allow php-cgi to
After buying a cloud server, the system automatically installs the Nginx 1.6 + PHP 5.3.28 + mysql 5.5
After the PHP program into the cloud server, the first test program access to normal, normal speed
But put the program on the line after the visit, will gradually find that access to the PHP page more and more slowly, and finally directly appear 502 bad gateway
Received an alert email today prompting the website 502 Bad Gateway,You cannot open the Web site URL after entering it:Log on to the server to see Nginx process OK:To view the FASTCGI process has stopped running:Problems found after the search is what the cause of the problem, the first fastcgi process started after the site can access the reasons for fine.View P
Millions of data were checked directly Nginx 502 bad gateway. Another server is good. I cannot log on to the server to view the configuration. Ask you to get nginx+php comrades. What are the settings of your server? I sent it to the hardware department.
Reply to discussion (solution)
502 is usually the php-fpm o
continuously debug and find a balance point based on the running status of your website.
There is also a lazy approach for max_children,
If your php is 5.3You can set the fpm style to apache-like. In this case, the number of children is automatically controlled by fpm. The corresponding configuration parameters are:
Start_servers: Number of starting processes
Min_spare_servers: Minimum number of processes
Max_spare_servers: Maximum number of processes
When the server is idle, fpm will take the
error occurs. You can increase memory_limit of php. ini to 64 MB.Other causes that may cause 502 bad gateway errorsInsufficient. php-fpm process countUse netstat-napo | grep "php-fpm" | wc-l to check the number of fastcgi processes. If the number is close to the upper limit configured in conf, you need to increase the number of processes.However, you c
To find some of the Internet and 502 bad gateway errors related to the problems and troubleshooting methods, first from the fastcgi configuration start:
1. See if the fastcgi process has started
The meaning of the NGINX 502 error is sock, the port is not being monitored. Let's check to see if fastcgi is running.
2.
# in Nginx and PHP-FPM next visit Nginx on the instant 502 question Php-fpmsignal 7 (Sigbus)
Failure phenomenon
Use the tinkphp3.2.x frame, the page occasionally appear a visit Nginx on the report 502 bad Gateway, not wait for a period of time Nginx only reported 502, open
Nginx 502 Bad Gateway can be forcibly refreshed by the client, but the solution is either to change the configuration or put it on the CDN. In this case, someone found that index.html can be accessed. Because we are an online website and do not have much time to study it, this is temporary. Then, someone suggested that Ctrl + F5 should be used to refresh the cach
corresponding ports on the queue is full of two casesThe somaxconn of the system can be modified in the following wayVim/etc/sysctl.confNet.core.somaxconn = 2048Sysctl-pIn PHP-FPM, there is an option for thisListen.backlog =-1This value, preferably not set to-1, 1 when the system is not able to set the number of settings, resulting in 502 appears2015/02/11 12:37:22 [ERROR] 25725#0: *1015645 connect () to Unix:/tmp/php-cgi.sock failed (11:resource tem
The principle is to use curl to obtain the HTTP header and execute the command to restart PHP-FPM when the 502 status code is found.
CopyCodeThe Code is as follows :#! /Usr/bin/PHP
$ Cmd = '/usr/local/PHP/sbin/PHP-FPM restart ';
For ($ I = 0; $ I $ Res = shell_exec ($ Exec );
If (stripos ($ res, '2014, 502 Bad gateway
The principle is to use Curl to obtain HTTP headers, found 502 status code to perform the restart PHP-FPM command.
Copy Code code as follows:
#!/usr/bin/php
$cmd = '/usr/local/php/sbin/php-fpm restart ';
for ($i = 0; $i $res = Shell_exec ($exec);
if (Stripos ($res, ' 502 Bad Gateway ')!== false) {
S
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