Werk #15409: Agent receiver crashes on IPv4-only Checkmk servers (regression introduced by werk 15416)

Component

Checks & agents

Title

Agent receiver crashes on IPv4-only Checkmk servers (regression introduced by werk 15416)

Date

Mar 7, 2023

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.3.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.2.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.1.0p24	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Werk 15416 introduced a regression which caused the agent receiver to crash on IPv4-only Checkmk servers. After starting, the receiver was initially reported as running for a brief amount of time by omd status, however, it then crashed with the following error message: var/log/agent-receiver/error.log

[ERROR] Can't connect to ('::', 8000)

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