Cloud Platform

Modules and applications incompatible with Cloud Platform

Due to Cloud Platform’s security and permissions requirements, you may experience incompatibilities with some applications and Drupal contributed modules.


For information about modules that can be used with Cloud Platform, but that may require additional configuration, see Modules to use with caution on Cloud Platform.


The following Drupal contributed modules cannot be used with Cloud Platform-based websites:

Advanced VarnishThis module requires subscribers to replace Acquia’s default VCL with a companion custom Varnish configuration not supported on Cloud Platform.
ApacheSolr fileSubscribers can’t edit the solrconfig.xml file on Cloud Platform.
APCAlternative PHP cache is not recommended on Cloud Platform. It stores data on a per-infrastructure basis, which can lead to different data being served by different infrastructure. It also uses memory that would otherwise be used by OPcache. We recommend using Memcached instead.
AutoSlaveThe Cloud Platform interface is configured to detect the primary and subordinate infrastructure and handle failover situations. This module hardcodes the settings and can cause your infrastructure to read or write to the incorrect database.
Background ProcessThe Background Process Apache infrastructure status module isn’t compatible with Cloud Platform.
Backup and MigrateNot supported on Cloud Platform. For more information, see Backup and Migrate module not supported on Cloud Platform.
Block Cache AlterThis module causes issues with caching, and has not been updated in several years. It is not recommended for use.
BoostThis creates many disk writes, which can cause problems on shared infrastructure. See Boost and Cloud Platform for more details.
CDNThe File Conveyor sub-module, specifically, is incompatible with Acquia Cloud. The distributed file system used by Cloud Platform Enterprise doesn’t support inotify, which this module requires for operation. This is related to content delivery networks (CDNs) and using Origin Pull mode will still work.
CiviCRMCiviCRM is dependent on stored procedures and triggers that do not work in the Cloud Platform interface.
CloudFlare Purge (cfpurge)This module includes API limits that may prevent users from viewing updated content on your website. Instead, Acquia recommends the use of Acquia Purge.
Configuration ManagementThis module requires a writeable directory that is also trackable at the same time by Git; this approach isn’t possible on Cloud Platform.
Facebook ConnectRequire session cookies to be set, preventing Varnish® from caching pages.
File CacheThe File Cache module moves caching to the file system, which can cause major load on the distributed file system and can cause the site (or multiple sites in the case of shared hosting) to go down.
Global FilterSets session cookies to filter views, which prevents Varnish from caching pages.
H5PThe H5P module sets session cookies for anonymous visitors using pages that contain H5P elements. This results in all future requests for those anonymous users to bypass Varnish caching.

HTTP/2 Server Push

This module has reached End-of-Life and will not receive any further maintenance. The project page also recommends for uninstalling this module.
IP Geolocation Views & MapsRequire session cookies to be set, preventing Varnish from caching pages.
Memcache StorageAlthough not incompatible, Acquia discourages using this module’s due to its developer’s limited updates. Instead, Acquia encourages the use of the Memcache API and Integration module, which integrates better with Acquia’s memcached implementation.
Mobile ToolsMobile Tools prevents the use of Varnish. See Enabling device-based redirects for other options that work with Cloud Platform.
MonologThe Monolog module uses a syslog configuration incompatible with Cloud Platform. You should avoid using this module and use the core Syslog module instead.
OptimizeDBThis module optimizes all database tables and displays its sizes which can cause locked tables and other performance problems for your website.
Pantheon Advanced Page CacheThis module is incompatible with Acquia Cloud, and might cause Drupal to output HTTP headers that are too large for Cloud Platform. This causes errors of type 500 that are difficult to troubleshoot. The equivalent functionality in Acquia Cloud is provided by the Acquia Purge module. For more information, see Installing Acquia Purge.
PDF to HTML node generatorThis module provides integration with the pdftohtml php library. This module is not installable on Cloud Platform.
Role memory limitThis module overrides memory limits set in settings.php.
Serial FieldSerial is based on an auto_increment of 1. Cloud Platform uses an auto_increment of five.
Session APIRequires session cookies to be set, preventing Varnish from caching pages. 
Session API sets cookies on the user. When using this module, cron can run intense queries to join the session and session_api tables, causing major slowdowns.
Session Cache APIThis module is generally incompatible with Varnish caching. It may also cause file system performance issues.
Shibboleth AuthenticationShibboleth is not supported on Cloud Platform. Other methods of achieving this functionality are SimpleSAMLphp or LDAP.
SimpleTestSimpleTest is based on an auto_increment of 1. Cloud Platform uses an auto_increment of five. For more information, see this issue on
Smart IPThis module can be configured to set session cookies for anonymous users, making it incompatible with Varnish.
SupercookieStores sessions outside of the session table, and sets No-Cache headers. This module is also incompatible with Varnish.
Text SizeRequire session cookies to be set, preventing Varnish from caching pages.
VarnishThis Drupal module attempts to replicate the effort of the Varnish Cache that is already available to Cloud Platform applications. It will not work with Cloud Platform applications because it requires connections to the load balancers, which Acquia does not provide. The Varnish caching provided by Acquia works out of the box, as long as you use caching.
Varnish PurgeTo purge Varnish under Acquia Cloud, you must disable this module and use the Acquia Purge module. For more information, see Installing Acquia Purge.
Views Filter HarmonizerThis module sets a SESSION cookie, preventing Varnish caching.
WebPThis Drupal module creates a WebP copy of image style derivatives to decrease loading times. WebP support is limited in Acquia Cloud. You can use WebP images in websites that are powered by Cloud Platform. However, the platform does not support using WebP with ImageMagick. Therefore, you might face issues with image resizing and cropping through Drupal image styles. For more information, see How to enable support for WebP images on Acquia Cloud.


For information about other software that is incompatible with Cloud Platform, see Unsupported software.