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Werk #10123: Fixed race condition when changing host check command.

Componentcmc
TitleFixed race condition when changing host check command.
Date2019-12-16 11:09:08
Checkmk EditionCheckmk Enterprise Edition (CEE)
Checkmk Version1.6.0p8,1.7.0i1,1.5.0p24
LevelProminent Change
ClassBug Fix
CompatibilityCompatible - no manual interaction needed

When the kind of a host check command was changed, e.g. from an active check to smart ping, there was a small time window for scheduling to go wrong. This resulted in endless log lines of the form "invalid command line '@foo' for bar", and the only way to resume normal operation was to restart the Checkmk Micro Core, reloading was not enough. This has been fixed.