Fatal error: Out of memory - unable to create or edit Contribution page or membership

Question

We went live with new website including CiviCRM last month. On test system our membership, payment and contribution page were all working OK. Pretty sure they were also OK post launch, and post upgrade to Civi 4.7.10. Now however we get blank page (HTTP error 500) on front end when accessing the contribution page with shortcade [civicrm component="contribution" id="1" mode="live" hijack="0"].

Turned on debug and get out of memory errors when:

1. Create new contribution page. At first continue button when using the CiviContribute dashboard, but immediately when through Administer -> CiviContribute -> New Contribution Page
2. Edit existing contribution page, configure 'Title and settings' or 'Contribution Amounts'. Other sections open and save OK.
3. Membership dashboard - immediately

Tried doubling the php memory up to 512M. Reinstalling 4.7.10. Checked 'CIVICRM_UF_BASEURL' in civicrm.settings.php. Deleted and recreated all payment processors, price sets and steps in the setup doc.

At a loss of where to go next. Any clues?

The detail of where the out of memory report comes changes but here's a sample:

Fatal error: Out of memory (allocated 118489088) (tried to allocate 49152 bytes) in /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/CRM/Campaign/BAO/Query.php on line 414

Backtrace:

CRM_Contribute_Exception_InactiveContributionPageException: "The page you requested is currently unavailable."

#0 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/CRM/Contribute/Form/Contribution/Main.php(63): CRM_Contribute_Form_ContributionBase->preProcess()
#1 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Form.php(519): CRM_Contribute_Form_Contribution_Main->preProcess()
#2 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/QuickForm/Action/Display.php(92): CRM_Core_Form->buildForm()
#3 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/packages/HTML/QuickForm/Controller.php(203): CRM_Core_QuickForm_Action_Display->perform(Object(CRM_Contribute_Form_Contribution_Main), "display")
#4 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/packages/HTML/QuickForm/Page.php(103): HTML_QuickForm_Controller->handle(Object(CRM_Contribute_Form_Contribution_Main), "display")
#5 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Controller.php(351): HTML_QuickForm_Page->handle("display")
#6 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(312): CRM_Core_Controller->run((Array:3), NULL)
#7 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(86): CRM_Core_Invoke::runItem((Array:15))
#8 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(54): CRM_Core_Invoke::_invoke((Array:3))
#9 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/civicrm.php(1227): CRM_Core_Invoke::invoke((Array:3))
#10 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-content/plugins/civicrm/includes/civicrm.basepage.php(132): CiviCRM_For_WordPress->invoke()
#11 [internal function](): CiviCRM_For_WordPress_Basepage->basepage_handler(Object(WP))
#12 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-includes/plugin.php(600): call_user_func_array((Array:2), (Array:1))
#13 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-includes/class-wp.php(738): do_action_ref_array("wp", (Array:1))
#14 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-includes/functions.php(963): WP->main("")
#15 /home/sites/bristolcyclingcampaign.org.uk/public_html/wp-blog-header.php(16): wp()
#16 /home/sites/bristolcyclingcampaign.org.uk/public_html/index.php(17): require("/home/sites/bristolcyclingcampaign.org.uk/public_html/wp-blog-header.php")
#17 {main}
 Sorry but we are not able to provide this at the moment.
The page you requested is currently unavailable.
Return to home page.

Update: Spent a good while investigating the memory issue, but it wasn't the root of the problem. It was helpful to put in some echo lines in civicrm.settings.php. They came up every page but on the 'fatal' pages helped to confirm that memory_limit was being set correctly, but didn't affect the error.

echo "memory_limit: " . ini_get('memory_limit') . " $memLimit: " $memLimit;

Answer 1

The problem was in enabling default language to English (United Kingdom). If default US then all OK, change to UK or Aus and it breaks. The US setting is OK.

To find this I striped back down to a clean and empty install:

• Delete (rename) the civicrm plugin.
• Select and drop all tables from the civi db
• Delete (rename) the uploads/civicrm folder (having taken copy of civicrm.settings.php)
• Clean install of civicrm 4.7.11, using existing empty db.
• Tested the memberships desktop as canary page. OK to begin with, but when set to UK localisation it breaks.

Having found this I was able to restore backed up db with full data that I feared was corrupt, and after changing language back to US, all seems OK.

Don't know where or what is the problem with the localisation...

Update: There may have been other underlying problems with the installation as well as there had been domain name and database name changes along with a switch from Joomla to Wordpress. After migration to a new server all problems, including reported memory use, appear resolved.