Werk #13468: mrpe: Do not crash upon invalid metrics

Component

Checks & agents

Title

mrpe: Do not crash upon invalid metrics

Date

Nov 8, 2021

Level

Trivial Change

Class

New Feature

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.1.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)
2.0.0p16	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

In Checkmk versions prior to 2.0, invalid performance data strings passed by the MRPE plugin have been ignored.

In Checkmk 2.0 the parsing would find those invalid strings, and crash upon them. This is generally the desired behaviour (see the documentation for a rationale).

However, since MRPE comprises a lot of different plugins, an all-or-nothing approach is rather inconvenient. We now parse everything as good as we can, and issue an UNKNOWN state for the affected service.

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