Werk #12502: Rare bug during parsing for clustered custom plugins

Component

Checks & agents

Title

Rare bug during parsing for clustered custom plugins

Date

Apr 11, 2021

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.1.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)
2.0.0p2	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

This werk only affects users that have certain custom plugins developed against the old check API in a clustered setup.

Specificly: This affects you, if you have

a custom check plugin
using the *_item_state features in the parse function
in a clustered service setup

In this case, you probably observed crashes of the parse function or stale services (we have never observed this theoretical bug). This will be fixed. However: If this actually affected you, you should consider moving all item_state related logic into the check function (as this will be enforced by the new API).

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