Description

A "Failed to extend contact lease" error might occur if a large number of pages were requested within a single interaction.

The following exception can be found in the Sitecore XP log:

316 2017:12:10 16:05:50 ERROR Cannot finish Analytics page tracking
Exception: Sitecore.Analytics.Exceptions.ContactLockException
Message: Failed to extend contact lease for contact ce9c9d9e-2d42-4b82-a871-1a2dd96f050e
Source: Sitecore.Analytics
   at Sitecore.Analytics.Tracking.ContactManager.SaveAndReleaseContact(Contact contact)
   at Sitecore.Analytics.Pipelines.EndAnalytics.ReleaseContact.Process(PipelineArgs args)
   at (Object , Object[] )
   at Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args)
   at Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, Boolean failIfNotExists)
   at Sitecore.Analytics.Pipelines.EndAnalytics.EndAnalyticsPipeline.Run()
   at Sitecore.Analytics.Pipelines.HttpRequest.EndAnalytics.Process(HttpRequestArgs args)
Exception is thrown for each next page

Important Note

The same error can be a result of an incorrect Session State configuration.

Before applying the patch, ensure that both Shared Session State and Private Session State are configured properly according to the following documentation: Session state configuration scenarios.

Solution

To resolve the issue, consider one of the following options:

• Upgrade Sitecore XP instance to Sitecore XP 8.2.7 or later.
• Download and install the patch compatible with the affected product version found on this page:
  
  • For Sitecore XP 8.2 rev. 160729 (Initial Release) — 8.2 rev. 171121 (Update-6): https://github.com/SitecoreSupport/Sitecore.Support.198208/releases/tag/8.2.0.1.
  • For Sitecore XP 8.1 rev. 160519 (Update-3): https://github.com/SitecoreSupport/Sitecore.Support.198208/releases/tag/8.1.3.0.
  • For Sitecore XP 8.1 rev.151207 (Update-1) and 160302 (Update-2): https://github.com/SitecoreSupport/Sitecore.Support.198208/releases/tag/8.1.1.1.