Umbraco Azure and Indexes Issue: Could not find file ...\ExamineIndexes\ExternalIndex_4l.cfs'

Hi,

I have an Umbraco 13 website and its hosted on an Azure web app environment.
But sometimes the Search Indexes are getting corrupt and I get this error:

Could not find file
‘C:\home\site\wwwroot\umbraco\Data\TEMP\ExamineIndexes\ExternalIndex_4l.cfs’.

File name:
‘C:\home\site\wwwroot\umbraco\Data\TEMP\ExamineIndexes\ExternalIndex_4l.cfs’

I noticed I get it often when I deploy (via Visual Studio Publish) a new version to the site.
As a work around I have added a composer that deletes the files of the search indexes so it will rebuild itself and then it works.
But lately the error comes back even when I had not deployed anything.

I have also deployed the same website to a windows webserver and there everything works fine without index issues, so it must be something in Azure.

Is this a known issue and how to resolve this once and for all?


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/115202-umbraco-azure-and-indexes-issue-could-not-find-file-examineindexesexternalindex_4lcfs