Hi everyone! I have a client that is running a app service in azure cloud with load balancing. The umbraco version is an old version 7.5.11. I tried to put : WEBSITE_DISABLE_OVERLAPPED_RECYCLING in azure env. variables but it crashes the site with 503. I think this is the error: 2024-04-20 13:45:40,549 [P6400/D2/T24] ERROR Umbraco.Core.UmbracoApplicationBase - An unhandled exception occurred Elasticsearch.Net.ElasticsearchClientException: The remote server returned an error: (503) Server Unavailable. Call: Status code 503 from: GET xxxxxx?pretty=true. ServerError: Type: no_shard_available_action_exception Reason: "No shard available for [get [xxxx-new_productdocument][74136_1_published]: routing [null]]" ---> System.Net.WebException: The remote server returned an error: (503) Server Unavailable. at System.Net.HttpWebRequest.GetResponse() I'm not totally sure but it does give me a 503 error https://stackoverflow.com/questions/60451194/umbraco-examine-file-locking-azure-app-service Søren Kottal answered the above and is as close to my situation as I can find but the umbraco version differs