Werk #11775: Services disappearing during discovery

Component	Checks & agents
Title	Services disappearing during discovery
Date	Dec 11, 2020
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0b2 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

Under certain timing conditions it could happen that services would vanish immediately after, or even during a full scan in the WATO services page.

This was due to the datasource writing empty cache files.

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