Werk #5038: Datasource programs: Prevent zombie processes in case of timeouts

Component	Core & setup
Title	Datasource programs: Prevent zombie processes in case of timeouts
Date	Jul 24, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.4.0p9 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.2.8p26 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

When using datasource programs (like e.g. special agents or SSH command line calls) to get agent data from hosts it may happen that these programs remain open as zombie processes. Check_MK has been extended to deal with this situation and clean up these processes.

Details: When the program execution takes too long Check_MK sends a SIGTERM to the process group of the executed program. After sending the signal Check_MK is now waiting for the process to finish.

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