Composer Returning Memory Allocation Error

Question

I just installed Composer and I am trying to download some files from sendgrid, however it is returning me memory error. Someone knows what’s causing this and how to fix it?

Installing sendgrid/php-http-client (3.1.0): Loading from cache
    proc_open(): fork failed - Cannot allocate memory
    The archive may contain identical file names with different capitalization (which fails on case insensitive filesystems)
    Unzip with unzip command failed, falling back to ZipArchive class
The following exception is caused by a lack of memory or swap, or not having swap configured
Check https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-fork-failed-errors for details

PHP Warning:  proc_open(): fork failed - Cannot allocate memory in phar:///usr/local/bin/composer/vendor/symfony/console/Application.php on line 959

Warning: proc_open(): fork failed - Cannot allocate memory in phar:///usr/local/bin/composer/vendor/symfony/console/Application.php on line 959

  [ErrorException]
  proc_open(): fork failed - Cannot allocate memory


require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-suggest] [--no-update] [--no-scripts] [--update-no-dev] [--update-with-dependencies] [--update-with-all-dependencies] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--] [<packages>]...

Answer 1

Problem solved, if someone has that same error I corrected this way:

/bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024
/sbin/mkswap /var/swap.1
/sbin/swapon /var/swap.1

source: https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-Fork-failed-errors

Answer 2

The @Ronaldom solution may not work if the amount of memory needed to run the Composer script is greater than your swap RAM + 1024.

In that case grow count=1024 for another value, such as: count=2048.

Especially for those who are having this mistake in a instance of the AWS, and can not run a script in any way, remember that you can increase / decrease without difficulty temporarily the RAM of your instance by upgrading / downgrade the type of instance.

For this in the Instances menu:

• select your instance

click on:

• actions > instance state > stop
• actions > instance Settings > change instance type (upgrade to the next type with more RAM)
• actions > instance state > start

Access the machine and run the Poser, repeat the above steps to downgrade.