Hi Zumrut CIM,
Please accept our apologies for the delayed response.
is being created during indexing to avoid two index services to perform operations over the index files at the same time. After the indexing service completes its work the file deleted.
In your case most probably indexing didn't finish properly and the file has been left, which actually was causing every other indexing service started later to wait until file is removed. And if your index is set to AutoIndex,
on every Publish for pages, it will fire indexing service event in order to add or update the index with the edited page contents.
Could you please send us information about your Sitefinity version? Thanks!
the Telerik team
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