Werk #13912: Fix crash on restarting the RRDHelper

Component The Checkmk Micro Core
Title Fix crash on restarting the RRDHelper
Date Jul 21, 2022
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.2.0b1
Not yet released
Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0b1
Not yet released
Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0b1 Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.1.0p9 Checkmk Enterprise (CEE), Checkmk MSP (CME)
2.0.0p28 Checkmk Enterprise (CEE), Checkmk MSP (CME)

The RRDHelper may need to be restarted without a full restart of the CMC. This could lead to an internal error and crash the CMC as well with a traceback such as

/omd/sites/.../bin/cmc(_Z11sig_survivei+0xc2) [0x6656d2] /lib/x86_64-linux-gnu/libc.so.6(+0x42520) [0x7fca01440520] /lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x12c) [0x7fca01494a7c] /lib/x86_64-linux-gnu/libc.so.6(raise+0x16) [0x7fca01440476] /lib/x86_64-linux-gnu/libc.so.6(abort+0xd3) [0x7fca014267f3] /omd/sites/.../bin/cmc() [0x64e6a5] /omd/sites/.../bin/cmc(_ZN10__cxxabiv111__terminateEPFvvE+0xa) [0xa0e61a] /omd/sites/.../bin/cmc() [0xa0e685] /omd/sites/.../bin/cmc(_ZN16DataExportThreadIN9rrdcached8protocol6UpdateENS1_6ReloadEE5startEv+0x78) [0x755998] /omd/sites/.../bin/cmc(_ZN9RRDHelper6createEPK6Object9RRDFormatRKSt6vectorI6MetricSaIS5_EE+0x703) [0x74ef33] /omd/sites/.../bin/cmc(_ZN9RRDHelper13processSingleERK15PerformanceDataPK6ObjectRK7RRDInfo+0xab0) [0x753780] /omd/sites/.../bin/cmc(_ZN9RRDHelper15processPerfDataERK15PerformanceDataPK6Object+0xdd) [0x75452d] /omd/sites/.../bin/cmc(_ZN4Core15processPerfdataEPK6Object+0xa1) [0x66b4b1] /omd/sites/.../bin/cmc(_ZN4Core25objectStateHasBeenChangedEP6Object+0x1c0) [0x66c370] /omd/sites/.../bin/cmc(_ZN4Core18processCheckResultERK11CheckResult+0x91) [0x66c801] /omd/sites/.../bin/cmc(_ZN11CheckHelper9getResultEv+0xb69) [0x8698e9] /omd/sites/.../bin/cmc(_ZN11CheckHelper12communicate_ERK6Poller+0xe6) [0x869c66] /omd/sites/.../bin/cmc(_ZN15CheckHelperPool12communicate_ERK6Poller+0x45) [0x86b5f5] /omd/sites/.../bin/cmc(_ZN4Core8mainLoopEv+0x4f5) [0x6724e5] /omd/sites/.../bin/cmc(_ZN4Core3runEv+0xae5) [0x673415] /omd/sites/.../bin/cmc(main+0xf1f) [0x65410f] /lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7fca01427d90] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7fca01427e40] /omd/sites/.../bin/cmc(_start+0x25) [0x65b675]

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