Connection reset by peer mod fcgid error reading data from FastCGI server

Question

I am having issue on PHP where my app is trying to run a php backup file and suddenly getting HTTP Error 500 Code  I have checked the logs and this what it saying       Tue Aug 28 14 17 28 2012   warn   client x x x x   104 Connection reset by peer  mod fcgid  error reading data from FastCGI server  referer  http   example com backup backup php    Tue Aug 28 14 17 28 2012   error   client x x x x  Premature end of script headers  backup php  referer  http   example com backup backup php   Anyone knows how to fix this  I m really stuck in here and can t find solution in internet   Hope anyone could share their knowledge   Thanks  James

User · Answer

I had this issue and realized that the file cgi-bin/php-fcgi had no execution rights.

It had 644 mode while is should have 755 mode.

Setting the correct mode was impossible (probably because the file was opened or sth), so I copied that file from another domain directory where it had proper rights already set and that fixed everything.

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I had very similar errors in the Apache2 log files    104 Connection reset by peer  mod fcgid  error reading data from FastCGI server Premature end of script headers  phpinfo php   After checking the wrapper scripts and Apache2 settings  I realized that  var www  did not have accordant permissions  Thus the FCGId Wrapper scripts could not be read at all   ls -la  var www drwxrws---  5 www-data     www-data     4096 Oct  7 11 17     For my scenario chmod -o rx  var www was required of course  since the used SuExec users are not member of www-data user group - and they should not be member for security reasons of course

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In CentOS releases suexec is compiled to run only in  var www  If you try to set a DocumentRoot somewhere else you have to recompile it - the error in apache log are   104 Connection reset by peer  mod fcgid  error reading data from FastCGI server Premature end of script headers  php5 fcgi

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I came across this one while debugging a virtualmin apache related error    In my case  I am running virtualmin and had in my virtual machine s php ini  safe mode On      In my Virtual Machine s error log  I was getting the fcgi Connection reset by peer  mod fcgid  error reading data from FastCGI server  In my main apache error log I was getting  PHP Fatal error   Directive  safe mode  is no longer available in PHP in Unknown on line 0  In my case  I simply set safe mode   Off in my php ini and restarted apache   stackoverflow com questions 18683177 where-to-start-with-deprecated-directive-safe-mode-on-line-0-in-apache-error

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In my case I was using a custom extension for my PHP files and I had to edit  etc apache2 conf-available php7 2-fpm conf and add the following code        lt FilesMatch      YOUR CUSTOM EXTENSION   gt          SetHandler  proxy unix  run php php7 2-fpm sock fcgi   localhost       lt  FilesMatch gt

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I got the same problem  with Plesk 12 installed    However  when i switched from execute PHP as FastCGI to Apache Module the website worked   Checked my suexec log     cd  var log apache2    less suexec log   When you find something like this    2015-03-22 10 49 00   directory is writable by others    var www cgi-bin cgi wrapper   2015-03-22 10 49 05   uid   10004 gb  gid   1005 1005  cmd  cgi wrapper   try this commands    chown root root  var www cgi-bin cgi wrapper   chmod 755  var www cgi-bin cgi wrapper   shutdown -r now   as root   I hope it can help you

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I increased max execution time to 600 seconds job done

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if you want to install a PHP version  lt  5 3 0  you must replace  --enable-cgi   with   --enable-fastcgi   in your   configure statement  excerpt from the php net doc   --enable-fastcgi   If this is enabled  the CGI module will be built with support for FastCGI also  Available since PHP 4 3 0  As of PHP 5 3 0 this argument no longer exists and is enabled by --enable-cgi instead  After the compilation the   php-cgi -v should look like this   PHP 5 2 17  cgi-fcgi   built  Jul  9 2013 18 28 12  Copyright  c  1997-2010 The PHP Group Zend Engine v2 2 0  Copyright  c  1998-2010 Zend Technologies   NOTICE THE  cgi-fcgi

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Check  var lib php session and its permissions  This dir should be writable by user so the session can be stored

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I had the same problem with a different and simple solution   Problem  I installed PHP 5 6 following the accepted answer to this question on Ask Ubuntu  After using Virtualmin to switch a particular virtual server from PHP 5 5 to PHP 5 6  I received a 500 Internal Server Error and had the same entries in the apache error log    Tue Jul 03 16 15 22 131051 2018   fcgid warn   pid 24262   104 Connection reset by peer   client 10 20 30 40 23700  mod fcgid  error reading data from FastCGI server  Tue Jul 03 16 15 22 131101 2018   core error   pid 24262   client 10 20 30 40 23700  End of script output before headers  index php   Cause  Simple  I didn t install the php5 6-cgi packet   Fix  Installing the packet and reloading apache solved the problem    sudo apt-get install php5 6-cgi if you are using PHP 5 6 sudo apt-get install php5-cgi if you are using a different PHP 5 version sudo apt-get install php7 0-cgi if you are using PHP 7   Then use service apache2 reload to apply the configuration

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If you re on a shared server like me the host said it was a result of hitting memory limits  so they kill scripts which results in the  Premature end of script headers  seen in this error  They referred me to this   https   help dreamhost com hc en-us articles 216540488-Why-did-procwatch-kill-processes-on-my-Shared-serv   Given an increase in memory  the issues went  I think a backup plugin Updraft on wordpress was perhaps over zealous in its duty settings

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I had the same problem with long-running scripts with the error messages  Premature end of script headers  index php  and  Connection reset by peer  mod fcgid  error reading data from FastCGI server  in error log  After hours of testing this helps for me  CentOS 6  PHP-FPM 7  Plesk 12 5 30    edit the config file            etc httpd conf d fcgid conf      Set a higher running time  In my case 600 seconds  create the new entry           FcgidBusyTimeout 600      adapt following entries           FcgidIOTimeout 600          FcgidConnectTimeout 600      restart httpd           service httpd restart

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As already mentioned this could be happening due to fcgi handler permission issues  If you re using suexec - don t forget to check if apache has this module enabled

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Just install php5-cgi  in debian  sudo apt-get install php5-cgi  in Centos  sudo yum install php5-cgi

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Not in this questions askers case but often      What does the  premature end of script headers  error mean    That error means that the FCGI call was exited unexpectedly   In some cases it means that the script  backup php  did crash      How to fix this    If the crash of a script was the cause  fix the script so that it does not crash  Then this error is fixed  too  To find out if and why a script crashes  you need to debug it  For example you can check the PHP error log  Errors logged to STDERR normally go into the error handler of the FCGI

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I managed to solved this by adding FcgidBusyTimeout   Just in case if anyone have similar issue with me   Here is my settings on my apache conf    lt VirtualHost   80 gt           lt IfModule mod fcgid c gt  FcgidBusyTimeout 3600  lt  IfModule gt   lt  VirtualHost gt

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The famous Moodle  replace php  script can generate this situation too  For me it was taking ages to run and then failed with a 500 message in the browser and also with the above error message in my apache error log file   I followed up on  james-wise answer  FcgidBusy is readably described in the Apache documentation  I tried this  doubled the amount of time which apache would give my script to run  by inserting the following line in  etc apache2 mods-available fcgid conf  FcgidBusyTimeout 600   Then I restarted Apache and tried to run my replace php script again    Fortunately this time the script instance ran to completion  so for my purposes this served as a solution

[php] Connection reset by peer: mod_fcgid: error reading data from FastCGI server

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