We have an issue in our UAT environment where the sitecore_web_index Lucene index is not getting updated on a content delivery server when content is published.

I found this solution on Stack Overflow which works, but I don't want to have to change the instance name of the application to fix the issue. It must be tied to some information in the Sitecore databases that can be reset to bring the indexing functionality back.

Does anyone know what needs to be reset to allow a CD server to resume indexing web database content properly?

Some additional context:

  • CM and CD share a single core database
  • CD sitecore_web_index is set up to use onPublishAsync strategy
  • Renaming the InstanceName fixes the issue

Some things I've tried with no success:

  • Clearing the core database's Properties table's entries with the instance name in them
  • Clearing the EventQueue, History, and PublishQueue tables on the core and web databases
  • Do you have this strategy added in config. <strategies hint="list:AddStrategy"> <strategy ref="contentSearch/indexUpdateStrategies/remoteRebuild" /> </strategies>
    – Umar D
    Feb 25, 2019 at 23:00
  • And you have EnableEventQueues set to true? <setting name="EnableEventQueues" value="true"/>
    – Chris Auer
    Feb 25, 2019 at 23:19
  • Yep. Everything works if I change the InstanceName, so I know it's not a configuration issue. Feb 26, 2019 at 3:48
  • @DanSinclair The issue is because of the Scalability settings. You'll need to update the instance name so that Sitecore knows where the publish has been triggered Feb 26, 2019 at 8:12
  • You don't have to rename the instance. You can just set Publishing.PublishingInstance to the name of your CM server. I usually just set InstanceName to CM on the CM server and leave the others unnamed.
    – mikaelnet
    Feb 26, 2019 at 9:03

1 Answer 1


The solution requires an AppPool recycle to take effect:

  1. Execute the following SQL statement against the core database
  2. Recycle the CD's AppPool

After this, you will want to rebuild the indexes on the CD so that they pick up any changes that were missed while indexing was broken.

  • I'm curious if you run this query SELECT * FROM [Properties] where [Key] like '%SITECORE_WEB_INDEX%LAST_UPDATED_TIMESTAMP' if you see two distinct results for your CM Web index and your CD Web index. I bring this up because what you're experiencing could be explained if the autogen'd InstanceName of CM and CD came back the same- in which case setting the InstanceName per server would be the true fix.
    – jrap
    Feb 26, 2019 at 19:50
  • Good question. The InstanceName is different for each server (we just set it to the server name), so they should never overlap. Feb 26, 2019 at 19:53

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