Werk #17622: rabbitmq_nodes_sockets: Drop service for rabbitmq version >= 4.0.1

Component	Checks & agents
Title	rabbitmq_nodes_sockets: Drop service for rabbitmq version >= 4.0.1
Date	Mar 3, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Incompatible - Manual interaction might be required
Checkmk versions & editions	2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.3.0p29 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

With the release of rabbitmq v4.0.1 several I/O related metrics are no longer made available by rabbitmq, among others sockets_used and sockets_total. Previously a default value of 0 being returned for these values lead to a crash of the check plugin with a ZeroDivisionError. Now the service will no longer be discovered. As long as the service is not removed, it will become {CRIT} with the message

No available sockets

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