Description

If a search index is being rebuilt, installing a package using the Installation Wizard might interrupt the rebuild operation. During package installation, indexing gets stopped instead of being paused. As a result, a new index rebuild is required to fix the inconsistency between the content and the indexed data.

The issue occurs despite the following message in the Crawling log:

[TIMESTAMP value] WARN  Resuming indexing after package has been installed.
[TIMESTAMP value] WARN  [Index=your_index_name] Crawling Resumed

Solution

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

• For Sitecore XP 9.0 and later, proceed as follows:
  1. Create a configuration patch file in the \App_Config\Include\zzz folder:

     <?xml version="1.0" encoding="utf-8" ?>
     <configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:role="http://www.sitecore.net/xmlconfig/role/">
       <sitecore role:require="Standalone or ContentManagement or ContentDelivery or XMCloud">
         <events>
           <event name="packageinstall:starting">
             <handler type="Sitecore.ContentSearch.Events.PackagingEventHandler, Sitecore.ContentSearch" method="OnPackageInstallStartingHandler">
               <patch:delete />
             </handler>
           </event>
           <event name="packageinstall:starting:remote">
             <handler type="Sitecore.ContentSearch.Events.PackagingEventHandler, Sitecore.ContentSearch" method="OnPackageInstallStartingRemoteHandler">
               <patch:delete />
             </handler>
           </event>
           <event name="packageinstall:poststep:starting">
             <handler type="Sitecore.ContentSearch.Events.PackagingEventHandler, Sitecore.ContentSearch" method="OnPackagePostStepInstallStartingHandler">
               <patch:delete />
             </handler>
           </event>
           <event name="packageinstall:poststep:starting:remote">
             <handler type="Sitecore.ContentSearch.Events.PackagingEventHandler, Sitecore.ContentSearch" method="OnPackagePostStepInstallStartingRemoteHandler">
               <patch:delete />
             </handler>
           </event>
         </events>
       </sitecore>
     </configuration>

  2. In the Sitecore configuration files, replace all the occurrences of 

     <strategy ref="contentSearch/indexConfigurations/indexUpdateStrategies/syncMaster" />

     with:

     <strategy ref="contentSearch/indexConfigurations/indexUpdateStrategies/intervalAsyncMaster" />

• For Sitecore XP 8.2 Update-7 and earlier, upgrade to a later version of the product.