We have a umbraco solution running, that recently started not correctly rebuilding the examine indexes.

Yesterday it did an error with all the indexes being locked (both custom and default indexes). But I deleted all the cache and indexes and had it rebuild it, which it did without thowing errors or warnings in the umbraco log.

We have 3 custom indexes, two of them shows nothing as it is atm, and only one of them shows a partially complete result.

We haven't changed anything in the configfiles, from since it was working.

At the moment it is hosted on a Azure App Service, but the problem was the same when it was hosted on an Azure Virtual Machine.

The examine indexes ("App_Data/ExamineIndexes/") used to take up 80mb of space, but at the moment, with the lackfull indexes, it takes up only 40 mb of space.

One of the file structures for one of the search indexes, that doesnt work, looks like this:

Any idea what to do, to get it to rebuild properly?

(We are using umbraco 7.5.6)