Getting parsing error reports from __construct

[iwemuiser]

We are getting a lot of these errors. When I open the page which gave the error however, everything seems fine. We are using Omeka 2.1.2.

2014-02-21T13:05:19+01:00 ERR (3): exception 'Exception' with message 'String could not be parsed as XML' in /var/www-vb/plugins/SocialBookmarking/helpers/SocialBookmarkingFunctions.php:47
Stack trace:
#0 /var/www-vb/plugins/SocialBookmarking/helpers/SocialBookmarkingFunctions.php(47): SimpleXMLElement->__construct('')
#1 /var/www-vb/plugins/SocialBookmarking/helpers/SocialBookmarkingFunctions.php(57): social_bookmarking_get_services_xml()
#2 /var/www-vb/plugins/SocialBookmarking/helpers/SocialBookmarkingFunctions.php(87): social_bookmarking_get_services()
#3 /var/www-vb/plugins/SocialBookmarking/SocialBookmarkingPlugin.php(124): social_bookmarking_toolbar('http://www.verh...', 'Griselidis', 'Bekijk volledig...')
#4 [internal function]: SocialBookmarkingPlugin->hookPublicItemsShow(Array)
#5 /var/www-vb/application/libraries/Omeka/Plugin/Broker.php(157): call_user_func(Array, Array)
#6 /var/www-vb/application/libraries/globals.php(188): Omeka_Plugin_Broker->callHook('public_items_sh...', Array)
#7 /var/www-vb/themes/verhalenbank/items/show.php(64): fire_plugin_hook('public_items_sh...', Array)
#8 /var/www-vb/application/libraries/Omeka/View.php(117): include('/var/www-vb/the...')
#9 /var/www-vb/application/libraries/Zend/View/Abstract.php(888): Omeka_View->_run('/var/www-vb/the...')
#10 /var/www-vb/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(900): Zend_View_Abstract->render('items/show.php')
#11 /var/www-vb/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(921): Zend_Controller_Action_Helper_ViewRenderer->renderScript('items/show.php', NULL)
#12 /var/www-vb/application/libraries/Zend/Controller/Action/Helper/ViewRenderer.php(960): Zend_Controller_Action_Helper_ViewRenderer->render()
#13 /var/www-vb/application/libraries/Zend/Controller/Action/HelperBroker.php(277): Zend_Controller_Action_Helper_ViewRenderer->postDispatch()
#14 /var/www-vb/application/libraries/Zend/Controller/Action.php(527): Zend_Controller_Action_HelperBroker->notifyPostDispatch()
#15 /var/www-vb/application/libraries/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('showAction')
#16 /var/www-vb/application/libraries/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#17 /var/www-vb/application/libraries/Zend/Application/Bootstrap/Bootstrap.php(97): Zend_Controller_Front->dispatch()
#18 /var/www-vb/application/libraries/Zend/Application.php(366): Zend_Application_Bootstrap_Bootstrap->run()
#19 /var/www-vb/application/libraries/Omeka/Application.php(79): Zend_Application->run()
#20 /var/www-vb/index.php(23): Omeka_Application->run()
#21 {main}

[patrickmj]

I was able to reproduce this on my machine by closing the internet connection, so my first guess is that the errors came up because the AddThis service the plugin uses was unavailable. I'll check with others here with the plugin installed to see if they have the same thing in their error logs.

Are the errors still coming in regularly?

[iwemuiser]

I get the messages very irregularly, but they always come in fast succession of each other then they appear. So that backs the idea that a server is unreachable somewhere.

[jajm]

Same issue today.

https://cache.addthiscdn.com/services/v1/sharing.en.xml returns a 503 error with the following message:

An error occurred while processing your request.

Reference #30.56a1002.1566812292.47f346a