Occasional TF255040 error in the [Incremental Analysis Database Sync] TFS Job

When reviewing the job execution log, I noticed the [Incremental Analysis Database Sync] failed several times during the last few days, but not every time.

The strange part was that the error was TF255040 meaning the SSRS components where not installed. It puzzled me at first because the components are installed or they are not, but they cannot be occasionally not installed.

Then I remember a fail-over application tier had been installed a few months earlier without ever being used. It seems TFS suddenly decided to load-balance some jobs to the fail-over application tier. After a quick look it appeared that the SSRS components were not installed on the fail-over app-tier. Installing them seems to have resolved the issue.

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