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Werk #4426: Fixed PID file locking

Component Core & setup
Title Fixed PID file locking
Date Feb 23, 2017
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
1.5.0i1 Checkmk Pro, Checkmk Ultimate MT
1.4.0b3 Checkmk Pro, Checkmk Ultimate MT

Previously it was possible to start the Check_MK Micro Core multiple times, which resulted in totally erratic behavior. This has been fixed by correctly locking the core's PID file.

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