I try to deploy wordpress on amazon ec2, I am facing the trouble on nginx and php-fpm, thanks for your help in advance. I got the error as the following when nginx and php-fpm are running.

[error] 16282#0: *1 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, 

But if I stop php-fpm, and use "php-cgi -b 9000" instead, it works fine. I have another question is how to debug the issue on nginx and php-fpm, it throws little error message in the log files even I set log level to debug or info. Looking forward to get your response. Thanks a lot.

The following is my configue files.


server {
    listen       80;
    root /usr/www/ROOT/wordpress;

    #charset koi8-r;
    #access_log  /var/log/nginx/log/host.access.log  main;

    #location ~ \.(htm|html|gif|jpg|jpeg|png|bmp|ico|css|js|txt)$ {
    #    root /usr/www/ROOT/wordpress;
    #    expires 24h;

    location / {
    #    root   /usr/www/ROOT/wordpress;
        index  index.php index.html index.htm;

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
    #    root   /usr/share/nginx/html;

    # proxy the PHP scripts to Apache listening on
    #location ~ \.php$ {
    #    proxy_pass;

    #location / {
    #   proxy_pass;

    # pass the PHP scripts to FastCGI server listening on
    location ~ \.php$ {
        #root   /usr/www/ROOT/wordpress;
        fastcgi_intercept_errors on;
    fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
        #fastcgi_param  SCRIPT_FILENAME /usr/www/ROOT/wordpress$fastcgi_script_name;
    #fastcgi_param SCRIPT_FILENAME $request_filename;
    include        fastcgi_params;

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #location ~ /\.ht {
    #    deny  all;

part of the config in /etc/php-fpm.d/www.conf

; Start a new pool named 'www'.

; The address on which to accept FastCGI requests.
; Valid syntaxes are:
;   'ip.add.re.ss:port'    - to listen on a TCP socket to a specific address on
;                            a specific port;
;   'port'                 - to listen on a TCP socket to all addresses on a
;                            specific port;
;   '/path/to/unix/socket' - to listen on a unix socket.
; Note: This value is mandatory.
listen =

; Set listen(2) backlog. A value of '-1' means unlimited.
; Default Value: -1
;listen.backlog = -1

; List of ipv4 addresses of FastCGI clients which are allowed to connect.
; Equivalent to the FCGI_WEB_SERVER_ADDRS environment variable in the original
; PHP FCGI (5.2.2+). Makes sense only with a tcp listening socket. Each address
; must be separated by a comma. If this value is left blank, connections will be
; accepted from any ip address.
; Default Value: any
listen.allowed_clients =

; Set permissions for unix socket, if one is used. In Linux, read/write
; permissions must be set in order to allow connections from a web server. Many
; BSD-derived systems allow connections regardless of permissions. 
; Default Values: user and group are set as the running user
;                 mode is set to 0660
;listen.owner = nobody
;listen.group = nobody
;listen.mode = 0660

; Unix user/group of processes
; Note: The user is mandatory. If the group is not set, the default user's group
;       will be used.
; RPM: apache Choosed to be able to access some dir as httpd
user = apache
; RPM: Keep a group allowed to write in log dir.
group = apache
  • I have a feeling that you have SCRIPT_FILENAME declared in fastcgi_params file as well and it doesn't point to the right location. Or apache user does not have permissions to access those files. Try using runusuer and run php-cgi -b 9000 as apache. – Florin Asăvoaie Sep 7 '14 at 10:15
  • Are the parent directories of your directory readable and traversable? – Michael Hampton Sep 7 '14 at 14:03
  • Thank a lot for your response, very kind of you. I tried to run php-cgi as apache, it works again. And it did not declare SCRIPT_FILENAME in fastcgi_params file, the file is the default one. – lunaseakyo Sep 7 '14 at 14:49
  • To Michael: Thanks. I have rudely run "chmod 777 -R" to the root of wordpress directory. – lunaseakyo Sep 7 '14 at 14:51

You are defining the extra fastcgi_param lines before including fastcgi_params file. This means that fastcgi_params defines will override the ones you define here.

So, move include fastcgi_params before fastcgi_param lines.

  • Thanks. I tried your way, but it did not work. It works if I use "php-cgi -b 9000".... So I guess the issue is on php-fpm side. – lunaseakyo Sep 8 '14 at 14:32

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