'Error in creating indexes in Solr 8.1.1 running on an Azure App Service

We have created a new Sitecore environment with the Azure market place solution "Azure Experience Cloud" Sitecore version 9.3 XM scaled topology with Solr search.

Steps we followed for creating Solr App service:

  1. Created a blank sitecore 9.3 solution from Azure market place and created a Web app for Solr.
  2. Unzipped the Solr 8.1.1 package and copied all the contents to wwwroot folder of the Web app created for Solr.
  3. Created a new Solr core by creating a new {index folder} folder and copied conf from the /site/wwwroot/server/solr/configsets/_default.
  4. Created a core.properties file with numShards=2 & name={index folder}.

We get the below error:

org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Index dir 'C:\home\site\wwwroot\server\solr{index folder}\data\index/' of core '{index folder}' is already locked. The most likely cause is another Solr server (or another solr core in this server) also configured to use this directory; other possible causes may be specific to lockType: native

How can we resolve the above problem?

azuresolrsitecoreserverlessazure-appservice


Solution 1:[1]

This is a known issue with Solr running on an Azure App Service and usually gets resolved by restarting the App Service. Of course, it is not a proper solution, but can work short-term.

Moving forward I would recommend to create a virtual machine in Azure and setup Solr there or, alternatively, look at a SearchStax solution offering a fully managed Solr-as-a-Service.

Also please take a look at a relevant post on Sitecore Stack Exchange.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Kate Orlova

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