Composer - Cannot allocate memory

DursunCan

I am using 2 GB ram virtual server. I did not set up a swap. I got this error in 2 different plugin installation.

# composer require saleksin/flarum-auth-google
Do not run Composer as root/super user! See https://getcomposer.org/root for details
Using version v0.1.0-beta.8.0.3 for saleksin/flarum-auth-google
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 2 installs, 0 updates, 0 removals
  - Installing league/oauth2-google (3.0.2): Downloading (100%)         
    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

Installation failed, reverting ./composer.json to its original content.
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 952

Warning: proc_open(): fork failed - Cannot allocate memory in phar:///usr/local/bin/composer/vendor/symfony/console/Application.php on line 952
                                                     
  [ErrorException]                                   
  proc_open(): fork failed - Cannot allocate memory  
                                                     

require [--dev] [--prefer-source] [--prefer-dist] [--fixed] [--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>]...

# php flarum info
Flarum core 0.1.0-beta.13
PHP version: 7.4.6
Loaded extensions: Core, date, libxml, openssl, pcre, zlib, filter, hash, pcntl, Reflection, SPL, session, standard, sodium, mysqlnd, PDO, xml, calendar, ctype, curl, dom, mbstring, FFI, fileinfo, ftp, gd, gettext, iconv, imap, json, exif, mysqli, pdo_mysql, Phar, posix, readline, shmop, SimpleXML, soap, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, xmlreader, xmlrpc, xmlwriter, xsl, zip, Zend OPcache
+----------------------------------+----------------+--------+
| Flarum Extensions                |                |        |
+----------------------------------+----------------+--------+
| ID                               | Version        | Commit |
+----------------------------------+----------------+--------+
| flarum-approval                  | v0.1.0-beta.13 |        |
| flarum-flags                     | v0.1.0-beta.13 |        |
| flarum-likes                     | v0.1.0-beta.13 |        |
| flarum-lock                      | v0.1.0-beta.13 |        |
| flarum-markdown                  | v0.1.0-beta.13 |        |
| flarum-mentions                  | v0.1.0-beta.13 |        |
| flarum-sticky                    | v0.1.0-beta.13 |        |
| flarum-subscriptions             | v0.1.0-beta.13 |        |
| flarum-suspend                   | v0.1.0-beta.13 |        |
| flarum-tags                      | v0.1.0-beta.13 |        |
| flarum-emoji                     | v0.1.0-beta.13 |        |
| flarum-lang-english              | v0.1.0-beta.13 |        |
| fof-terms                        | 0.4.2          |        |
| fof-transliterator               | 0.2.0          |        |
| fof-pages                        | 0.4.0          |        |
| fof-user-directory               | 0.3.4          |        |
| fof-merge-discussions            | 0.3.3          |        |
| flagrow-ads                      | 0.2.4          |        |
| fof-best-answer                  | 0.1.7          |        |
| fof-drafts                       | 0.1.5          |        |
| fof-links                        | 0.3.0          |        |
| fof-user-bio                     | 0.1.3          |        |
| v17development-seo               | 1.2            |        |
| fof-follow-tags                  | 0.3.4          |        |
| fof-socialprofile                | 0.1.2          |        |
| fof-subscribed                   | 0.2.3          |        |
| fof-formatting                   | 0.1.4          |        |
| flarum-auth-github               | v0.1.0-beta.13 |        |
| fof-recaptcha                    | 0.1.2          |        |
| flarum-auth-facebook             | v0.1.0-beta.13 |        |
| fof-auth-discord                 | 0.1.3          |        |
| flarum-auth-twitter              | v0.1.0-beta.13 |        |
| fof-polls                        | 0.1.2          |        |
| fof-byobu                        | 0.5.0          |        |
| flagrow-analytics                | 0.8.0          |        |
| fof-geoip                        | 0.1.7          |        |
| flarum-bbcode                    | v0.1.0-beta.12 |        |
| fof-upload                       | 0.9.1          |        |
| flarum-pusher                    | v0.1.0-beta.13 |        |
| isaced-email-verification-switch | 0.1.3          |        |
| fof-realtimedate                 | 0.1.2          |        |
| tolgaaaltas-turkish              | 0.13.2         |        |
| tolgaaaltas-lang-turkish         | 0.13.0         |        |
| fof-profile-image-crop           | 0.1.1          |        |
| flarum-statistics                | v0.1.0-beta.13 |        |
| clarkwinkelmann-circle-groups    | 0.2.1          |        |
| therealsujitk-gifs               | v1.4.8         |        |
| zerosonesfun-hashtags            | 2.0.1          |        |
| askvortsov-moderator-warnings    | v0.1.6         |        |
| fof-spamblock                    | 0.2.2          |        |
| fof-share-social                 | 0.1.2          |        |
| nomiscz-auth-steam               | v0.1.7         |        |
| the-turk-password-strength       | 0.1.3          |        |
| therealsujitk-show-password      | v1.0.3         |        |
| fof-nightmode                    | 0.4.0          |        |
| the-turk-diff                    | 1.0.7          |        |
| askvortsov-categories            | v0.2.7         |        |
| bokt-redis                       | 0.1.0          |        |
| fof-sitemap                      | 0.4.0          |        |
| the-turk-extended-appearance     | 0.1.1          |        |
| reflar-webhooks                  | 0.2.2          |        |
+----------------------------------+----------------+--------+
Base URL: https://forum.sourceturk.net
Installation path: /var/www/sourceturk/flarum
Debug mode: off

MartinJD

have you tried configuring a swap?

DursunCan

MartinJD I set a 2 gb swap. I tried again. It seems like no problem.

dd if=/dev/zero of=/swapfile count=2048 bs=1M
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo '/swapfile   none    swap    sw    0   0' | sudo tee -a /etc/fstab

MartinJD

what does free -h show?

DursunCan

MartinJD

~# free -h
              total        used        free      shared  buff/cache   available
Mem:           1.9G        422M        1.0G         53M        476M        1.3G
Swap:          2.0G        6.5M        2.0G

askvortsov

This seems a lot more like a hosting issue than a flarum issue, I'd recommend getting in contact with your host.

clarkwinkelmann

PHP also has an option in its configuration file to limit the memory usage. Usually execution time and memory is unlimited on command line when you install PHP yourself, but a managed host might have decided to apply a memory limit in the PHP configuration.

fakruzaruret

I solved memory allacation problem by adding 1GB of swap space. I think that while doing this require, the packagist consumes a lot of ram during scanning system and it is not enough. I also have 2 flarum installed and wordpress on my server, but when I use 400 mb in idle, if we pass 400mb in cache, there is 1.3 GB of available memory, but even that is not enough. I applied the tutorial here and added 1GB of swap space. Of course I used php flarum cache:clear and composer clear-cache commands. When using these commands, an extra 300 MB of cache was deleted.