Fixing the "fork failed - Cannot allocate memory" Error When Running Composer
The other day I tried to install the FOS User Bundle but I received the following error:
$ php composer.phar require friendsofsymfony/user-bundle "~2.0@dev"
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
- Installing friendsofsymfony/user-bundle (dev-master 16b04c4)
Cloning 16b04c49af05dd3fb381e4abe04f0e5e231ac76d
Installation failed, reverting ./composer.json to its original content.
The following exception is caused by a lack of memory and not having swap configured
Check https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-fork-failed-errors for details
PHP Fatal error: Uncaught exception 'ErrorException' with message 'proc_open(): fork failed - Cannot allocate memory' in phar:///var/www/composer.phar/vendor/symfony/console/Application.php:954
Stack trace:
#0 [internal function]: Composer\Util\ErrorHandler::handle(2, 'proc_open(): fo...', 'phar:///var/www...', 954, Array)
#1 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(954): proc_open('stty -a | grep ...', Array, NULL, NULL, NULL, Array)
#2 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(754): Symfony\Component\Console\Application->getSttyColumns()
#3 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(715): Symfony\Component\Console\Application->getTerminalDimensions()
#4 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(648): Symfony\Component\Console\Application->getTerminalWidth()
#5 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(130): Symfony\Component\Console\Application->renderException(Object(ErrorException), Object in phar:///var/www/composer.phar/vendor/symfony/console/Application.php on line 954
Fatal error: Uncaught exception 'ErrorException' with message 'proc_open(): fork failed - Cannot allocate memory' in phar:///var/www/composer.phar/vendor/symfony/console/Application.php:954
Stack trace:
#0 [internal function]: Composer\Util\ErrorHandler::handle(2, 'proc_open(): fo...', 'phar:///var/www...', 954, Array)
#1 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(954): proc_open('stty -a | grep ...', Array, NULL, NULL, NULL, Array)
#2 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(754): Symfony\Component\Console\Application->getSttyColumns()
#3 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(715): Symfony\Component\Console\Application->getTerminalDimensions()
#4 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(648): Symfony\Component\Console\Application->getTerminalWidth()
#5 phar:///var/www/composer.phar/vendor/symfony/console/Application.php(130): Symfony\Component\Console\Application->renderException(Object(ErrorException), Object in phar:///var/www/composer.phar/vendor/symfony/console/Application.php on line 954
In order to solve this problem I had to setup a swap file:
$ sudo /bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 1.54095 s, 697 MB/s
$ sudo /sbin/mkswap /var/swap.1
Setting up swapspace version 1, size = 1048572 KiB
no label, UUID=035dd6b9-2ff5-4597-bc7d-3f89f478e855
$ sudo /sbin/swapon /var/swap.1
Scott Keck-Warren
Scott is the Director of Technology at WeCare Connect where he strives to provide solutions for his customers needs. He's the father of two and can be found most weekends working on projects around the house with his loving partner.
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