Messages containing the following text in the category ERROR appear in the error.log file on a recurring basis:
com.day.cq.polling.importer.impl.PollingImporterImpl importData: Unexpected failure importing PollConfig
This error could be caused by an invalid configuration in the Cloud Services for Adobe SiteCatalyst and prevents the page impression data to be imported into Adobe Experience Manager.
This error causes the following issues:
Disable the Impression Importer if it's not necessary in an environment to avoid unnecessary resources being used (for example, the development, QA, and publish instances):
Adobe Experience Manager 5.6.x
Adobe CQ 5.5
Alternatively, you can deploy hot fix cq-5.5.0-hotfix-3394. It allows you to disable the importer via OSGi configuration instead OSGi component level. It omits the API call to SiteCatalyst when there's an invalid configuration.
Repeat these steps for each instance.
Adobe CQ 5.4
Please contact support.