Werk #16432: cisco_temperature: Handle Invalid Device Readings

Component

Checks & agents

Title

cisco_temperature: Handle Invalid Device Readings

Date

Jun 13, 2024

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.4.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p7	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0p28	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Cisco SNMP devices may report temperatures of "inf" or "-inf". According to CISCO-ENTITY-SENSOR-MIB, these values are not valid.

Previously, Checkmk would treat non-finite temperatures as valid. This invalid data would be written to tmp/check_mk/counters/, which then caused the Check_MK service to become UNKNOWN. Furthermore, the services on the host would become stale. With this Werk, the problematic values not persisted. Only the affected service state will be UNKNOWN.

If you are affected, you can delete the corrupted counter file in tmp/check_mk/counters/<host name>. To fix the readings reported by your device, please directly contact Cisco.

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