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:

Module/App Issue
Advanced Varnish This module requires subscribers to replace Acquia’s default VCL with a companion custom Varnish configuration not supported on Cloud Platform.
ApacheSolr file Subscribers can’t edit the solrconfig.xml file on Cloud Platform.
APC Alternative 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.
AutoSlave The 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 Process The Background Process Apache infrastructure status module isn’t compatible with Cloud Platform.
Backup and Migrate Not supported on Cloud Platform. For more information, see Backup and Migrate module not supported on Cloud Platform.
Block Cache Alter This module causes issues with caching, and has not been updated in several years. It is not recommended for use.
Boost This creates many disk writes, which can cause problems on shared infrastructure. See Boost and Cloud Platform for more details.
CDN The 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.
CiviCRM CiviCRM 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 Management This module requires a writeable directory that is also trackable at the same time by Git; this approach isn’t possible on Cloud Platform.
Facebook Connect Require session cookies to be set, preventing Varnish® from caching pages.
File Cache The 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 Filter Sets session cookies to filter views, which prevents Varnish from caching pages.
H5P The 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.
IP Geolocation Views & Maps Require session cookies to be set, preventing Varnish from caching pages.
Memcache Storage Although 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 Tools Mobile Tools prevents the use of Varnish. See Enabling device-based redirects for other options that work with Cloud Platform.
Monolog The Monolog module uses a syslog configuration incompatible with Cloud Platform. You should avoid using this module and use the core Syslog module instead.
OptimizeDB This module optimizes all database tables and displays its sizes which can cause locked tables and other performance problems for your website.
PDF to HTML node generator This module provides integration with the pdftohtml php library. This module is not installable on Cloud Platform.
Role memory limit This module overrides memory limits set in settings.php.
Serial Field Serial is based on an auto_increment of 1. Cloud Platform uses an auto_increment of five.
Session API Requires 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 API This module is generally incompatible with Varnish caching. It may also cause file system performance issues.
Shibboleth Authentication Shibboleth is not supported on Cloud Platform. Other methods of achieving this functionality are SimpleSAMLphp or LDAP.
SimpleTest SimpleTest is based on an auto_increment of 1. Cloud Platform uses an auto_increment of five. For more information, see this issue on
Smart IP This module can be configured to set session cookies for anonymous users, making it incompatible with Varnish.
Supercookie Stores sessions outside of the session table, and sets No-Cache headers. This module is also incompatible with Varnish.
TB Mega Menu This module can cause performance problems for your website and is not covered by Drupal’s security policy. If it must be used, patch the module to reduce calls made to your website’s database.
Text Size Require session cookies to be set, preventing Varnish from caching pages.
Varnish This 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.
Views Filter Harmonizer This module sets a SESSION cookie, preventing Varnish caching.
WebP This Drupal module creates a WebP copy of image style derivatives to decrease loading times. You can use WebP images in Cloud Platform-powered websites. However, Cloud Platform does not support the imagemagick dependency in WebP. Therefore, you might face issues with image resizing and cropping through Drupal image styles.


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