RabbitMQ 3.8+Erlang/OTP 21

Why?

Why is RabbitMQ 3.8 incompatible with Erlang/OTP 21?

Requirement

Erlang/OTP >=23.2.0 <24.4.0

Selected version

Erlang/OTP 21

Evaluation

21.3.8 does not satisfy >=23.2.0 <24.4.0

Conclusion

INCOMPATIBLE

Evidence

CompatHub reports compatibility from upstream sources rather than making unsupported claims of its own.

• RabbitMQ Erlang Compatibility

  Confidence: HIGH

  https://raw.githubusercontent.com/rabbitmq/rabbitmq-website/main/docs/which-erlang.md

  Retrieved 2 September 2026

  Requirement: >=23.2.0 <24.4.0

Erlang/OTP versions

Compatibility is derived from the project's declared Erlang/OTP requirement (>=23.2.0 <24.4.0); it does not mean every version combination has been independently tested.

• 21❌
• 22❌
• 23✓
• 24✓
• 25❌
• 26❌
• 27❌
• 28❌
• 29❌

Other Erlang/OTP versions satisfying this requirement

RabbitMQ 3.8 — compatible Erlang/OTP lines tracked in CompatHub

• ✓Erlang/OTP 23version lineEOL
• ✓Erlang/OTP 24version lineEOL

Other RabbitMQ versions

Only lines with relevant compatibility evidence are listed.

• RabbitMQ 4.3
• RabbitMQ 4.2
• RabbitMQ 4.1
• RabbitMQ 4.0
• RabbitMQ 3.13
• RabbitMQ 3.12
• RabbitMQ 3.11
• RabbitMQ 3.10
• RabbitMQ 3.9
• RabbitMQ 3.8
• RabbitMQ 3.7

Lifecycle context

Lifecycle status is separate from compatibility. An EOL component can still satisfy a documented version requirement.