Werk #19587: cmk --check: don't create crash reports when the output pipe closes early

Component

Checks & agents

Title

cmk --check: don't create crash reports when the output pipe closes early

Date

Jun 15, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

3.0.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

When running cmk --check HOST with the output piped to another command that exits early (e.g. cmk --check myhost | head -n 5), the resulting broken pipe was mistakenly treated as a check crash. This produced a spurious "Check_MK" service with status "check failed - please submit a crash report!" and uploaded a crash report. The broken pipe is now handled as a clean exit.

To the list of all Werks