PHP-FPM doesn t write to error log

Question

I ve just installed a nginx php-fpm server  Everything seems fine except that PHP-FPM never writes error to its log   fpm conf   default  listen    var run php-fpm default sock listen allowed clients   127 0 0 1 listen owner   webusr listen group   webusr listen mode   0666 user   webusr group   webusr pm   dynamic pm max children   50 pm start servers   5 pm min spare servers   5 pm max spare servers   35 pm status path    php fpm status ping path    php fpm ping request terminate timeout   30s request slowlog timeout   10s slowlog    var log php-fpm default slow log chroot    var www sites webusr catch workers output   yes env HOSTNAME    mapsvr mapking com php flag display errors    on php admin value error log     var log php-fpm default error log php admin flag log errors    on   nginx conf  server     listen        80 default server    server name         charset       utf-8    access log     var log nginx access log rest     include       conf d drops conf inc     location                root         var www sites webusr htdocs      index       index html index htm index php           pass the PHP scripts to FastCGI server listening on socket       location          php          root            var www sites webusr htdocs      include         etc nginx fastcgi params      fastcgi index  index php      fastcgi param  SCRIPT FILENAME  htdocs  fastcgi script name      if  -f  request filename              fastcgi pass   unix  var run php-fpm default sock               location         php fpm status         include         etc nginx fastcgi params      fastcgi param  SCRIPT FILENAME  document root fastcgi script name      fastcgi pass   unix  var run php-fpm default sock         location         php fpm ping         include         etc nginx fastcgi params      fastcgi param  SCRIPT FILENAME  document root fastcgi script name      fastcgi pass   unix  var run php-fpm default sock           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          I ve made an erroneous php script and run  and see error output on the web browser  Also nginx error log states stderr output from fpm with the same message  I ve check that the user have write  I ve even tried 777  permission to the appointed log folder  Even the appointed error log file has be created successfully by php-fpm  However  the log file is always empty  no matter what outrageous error has been made from php script   What s going on    Found the reason quite a while later   It was permission  Changed the owner to the sites s users solved the problem

User · Answer

In my case php-fpm outputs 500 error without any logging because of missing php-mysql module. I moved joomla installation to another server and forgot about it. So apt-get install php-mysql and service restart solved it.

I started with trying to fix broken logging without success. Finally with strace i found fail message after db-related system calls. Though my case is not directly related to op's question, I hope it could be useful.

User · Answer

Check the Owner directory of  PHP-FPM   You can do   ls -lah  var log php-fpm  chown -R webusr webusr  var log php-fpm  chmod -R 777  var log php-fpm

User · Answer

In your fpm conf file you haven t set 2 variable which are only for error logging  The variables are error log  file path of your error log file  and log level  error logging level     Error log file   Note  the default prefix is  usr local php var   Default Value  log php-fpm log  error log   log php-fpm log    Log level   Possible Values  alert  error  warning  notice  debug   Default Value  notice  log level   notice

User · Answer

There are multiple php config files  but THIS is the one you need to edit    etc php version   fpm pool d www conf   uncomment the line that says   catch workers output   That will allow PHPs stderr to go to php-fpm s error log instead of  dev null

User · Answer

in my case I show that the error log was going to  var log php-fpm www-error log   so I commented this line in  etc php-fpm d www conf  php flag display errors    is commented php flag display errors    on  log will be at  var log php-fpm www-error log   and as said above I also uncommented this line   catch workers output   yes   Now I can see logs in the file specified by nginx

User · Answer

I struggled with this for a long time before finding my php-fpm logs were being written to  var log upstart php5-fpm log  It appears to be a bug between how upstart and php-fpm interact  See more here  https   bugs launchpad net ubuntu  source php5  bug 1319595

User · Answer

I had a similar issue and had to do the following to the pool d www conf file  php admin value error log     var log fpm-php www log php admin flag log errors    on   It still wasn t writing the log file so I actually had to create it by touch  var log fpm-php www log then setting the correct owner sudo chown www-data www-data  var log fpm-php www log   Once this was done  and php5-fpm restarted  logging was resumed

User · Answer

I d like to add another tip to the existing answers because they did not solve my problem   Watch out for the following nginx directive in your php location block   fastcgi intercept errors on    Removing this line has brought an end to many hours of struggling and pulling hair   It could be hidden in some included conf directory like  etc nginx default d php conf in my fedora

User · Answer

I gathered insights from a bunch of answers here and I present a comprehensive solution   So  if you setup nginx with php5-fpm and log a message using error log   you can see it in  var log nginx error log by default   A problem can arise if you want to log a lot of data  say an array  using error log print r  myArr  true     If an array is large enough  it seems that nginx will truncate your log entry   To get around this you can configure fpm  php net fpm config  to manage logs  Here are the steps to do so     Open  etc php5 fpm pool d www conf     sudo nano  etc php5 fpm pool d www conf Uncomment the following two lines by removing   at the beginning of the line   error log is defined here  php net    php admin value error log     var log fpm-php www log  php admin flag log errors    on Create  var log fpm-php www log     sudo touch  var log fpm-php www log   Change ownership of  var log fpm-php www log so that php5-fpm can edit it     sudo chown vagrant  var log fpm-php www log   Note  vagrant is the user that I need to give ownership to  You can see what user this should be for you by running   ps aux   grep php  www and looking at first column  Restart php5-fpm     sudo service php5-fpm restart    Now your logs will be in  var log fpm-php www log

User · Answer

This worked for me     Redirect worker stdout and stderr into main error log  If not set  stdout and   stderr will be redirected to  dev null according to FastCGI specs    Default Value  no catch workers output   yes   Edit   The file to edit is the file that configure your desired pool  By default its   etc php-fpm d www conf

User · Answer

There is a bug https   bugs php net bug php id 61045 in php-fpm from v5 3 9 and till now  5 3 14 and 5 4 4   Developer promised fix will go live in next release  If you don t want to wait - use patch on that page and re-build or rollback to 5 3 8

[php] PHP-FPM doesn't write to error log

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