Issues with the OnPublishEndAsync index update strategy

  • The following issues may occur when using the OnPublishEndAsync strategy to update search indexes.

  • Note: This issue has been fixed in Sitecore CMS 7.2 Update-5 (rev. 140408), XP 8.0 Update-6 (rev. 151127) and 8.1 Update-1 (rev. 151207).

    Obsolete item versions may persist in search indexes after publishing. This may result in search indexes becoming out of sync with the actual website content.

  • Note: This issue has been fixed in Sitecore XP 8.2 Initial Release (rev. 160729).

    When using XP Sitecore 8.0 Update-3 (rev. 150427) or later, the index update operation may fail with the following error on rare occasions:

    ERROR An item with the same key has already been added.
    Exception: System.ArgumentException
    Message: An item with the same key has already been added.
    Source: mscorlib
       at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
       at Sitecore.ContentSearch.Maintenance.Strategies.OnPublishEndAsynchronousStrategy.ProcessQueue(IEnumerable`1 queue, Action`2 addElement)
       at Sitecore.ContentSearch.Maintenance.Strategies.OnPublishEndAsynchronousStrategy.ExtractIndexableInfoFromQueue(List`1 queue)
       at Sitecore.ContentSearch.Maintenance.Strategies.OnPublishEndAsynchronousStrategy.Run()
       at Sitecore.ContentSearch.Maintenance.OperationMonitor.ExecuteAction()
  • For Sitecore CMS 7.2 Update-4 (rev. 150408):

    Apply the following patch to address the issue:

    1. Place the Sitecore.Support.440383.dll assembly in the \bin folder.
    2. Place the Sitecore.Support.440383.config file in the \App_Config\Include folder.

    For Sitecore XP 8.0 Update-3 (rev. 150427) — 8.0 Update-5 (rev. 150812):

    Apply the following patch to address the issue:

    1. Place the Sitecore.Support.440383.449997.dll assembly in the \bin folder.
    2. Place the Sitecore.Support.440383.449997.config file in the \App_Config\Include folder.

    For Sitecore XP 8.0 Update-6 (rev. 151127) and later versions – contact Sitecore Support.

    Note: the provided configuration files patch the default onPublishEndAsync strategy definition. Please adjust those files appropriately if you have any custom strategy based on the onPublishEndAsync one.

Applies to:

CMS 7.2 Update-4 - 7.2 Update-6, 8.0 Update-3 - 8.1 Update-3

CMS 8.2 Initial Release

July 24, 2015
May 21, 2020

Reference number:

440383, 449997, 96688

Keywords: 

  • CMS,
  • Search and Indexing