Werk #19772: Oracle instance uptime check: handle negative uptime values

Component

Checks & agents

Title

Oracle instance uptime check: handle negative uptime values

Date

Apr 14, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0b5 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The Oracle instance uptime check could crash with a ValueError: Cannot render negative timespan when the Oracle database reported a negative uptime value. This can happen due to clock synchronization issues or Oracle-internal anomalies.

The check now handles negative uptime values gracefully by reporting a warning instead of crashing.

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