Modules and applications incompatible with Acquia Cloud

Acquia Cloud module and application issues

The Acquia Cloud platform and security require permissions and installs to be built in a particular fashion. This can sometimes cause incompatibilities with Drupal contributed modules.

Module/App Issue
ApacheSolr file Customers are unable to modify the solrconfig.xml file on Acquia Cloud.
APC Alternative PHP cache is not recommended on Acquia Cloud. It stores data on a per-server basis, which can lead to different data being served by different servers. It also uses memory that would otherwise be used by OPcache. We recommend using Memcached instead.
AutoSlave The Acquia Cloud platform is configured to auto-detect the primary and subordinate servers and handle failover situations. This module hardcodes the settings and can cause your server to read or write to the incorrect database.
Background Process The Background Process Apache server status module is not compatible with the Acquia Cloud platform.
Backup and Migrate Not supported on Acquia Cloud. For more information, see Backup and Migrate module not supported on Acquia Cloud.
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 servers. See Boost and Acquia Cloud for more details.
CiviCRM CiviCRM is dependent on stored procedures and triggers that do not work on the Acquia Cloud platform.
Configuration Management This module requires a writeable directory that is also trackable at the same time by Git; this is not currently possible on Acquia Cloud.
Facebook Connect Require session cookies to be set, preventing Varnish from caching pages.
File Cache The File Cache module moves caching to Gluster, which can cause major load on the Gluster file system and can cause the site (or multiple sites in the case of shared hosting) to go down.
File Conveyor GlusterFS, used by Acquia Cloud Enterprise, does not support inotify, which this module requires for operation. However, this is related to content delivery networks (CDNs) and using Origin Pull mode will still work.
Global Filter Sets session cookies to filter views, which prevents Varnish from caching pages.
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 Acquia Cloud.
Purge The Purge (7.x-1.x) module is not specifically incompatible, but can be difficult to set up correctly. We suggest using Acquia Purge instead. It is specifically intended for use on Acquia Cloud. Over time, these modules are planned to merge.
reCAPTCHA Require session cookies to be set, preventing Varnish from caching pages.
Role memory limit This module overrides memory limits set in settings.php.
Serial Field Serial is based on an auto_increment of 1. Acquia Cloud uses an auto_increment of 5.
Session API Requires session cookies to be set, preventing Varnish from caching pages.
Session API sets cookies on the user. Because of this, cron can run intense queries to join the session and session_api tables. This can cause 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 Acquia Cloud. Other methods of achieving this functionality are SimpleSAMLphp or LDAP.
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 Acquia Cloud applications. It will not work with Acquia Cloud 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.

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