| RabbitMq | Minimum required Erlang/OTP | Maximum  supported  Erlang/OTP | Notes | 
|---|
| 3.7.7 |  |  | 
RabbitMQ 3.7.7 is the first version to support Erlang/OTP 21Erlang/OTP 21 includes file I/O efficiency improvementsFor the best TLS support, the latest version of Erlang/OTP 21.0.x is recommendedVersions prior to 19.3.6.4 have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stoppingVersions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385)On Windows, Erlang/OTP 20.2 changed default cookie file location | 
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For the best TLS support, the latest version of Erlang/OTP 20.3.x is recommendedWe recommend Erlang/OTP 19.3.6.4 or later, earlier versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stoppingVersions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385)On Windows, Erlang/OTP 20.2 changed default cookie file location | 
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For the best TLS support, the latest version of Erlang/OTP 20.1.x is recommendedWe recommend Erlang/OTP 19.3.6.4 or later, earlier versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stoppingVersions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385) | 
|  |  |  | 
For the best TLS support, the latest version of Erlang/OTP 19.3.x is recommendedWe recommend Erlang/OTP 19.3.6.4 or later, earlier versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stoppingVersions prior to 19.3.6.4 are vulnerable to the ROBOT attack (CVE-2017-1000385) | 
|  |  |  | 
Erlang 18.x versions have known bugs (e.g. ERL-430, ERL-448) that can prevent RabbitMQ nodes from accepting connections (including from CLI tools) and stoppingAll Erlang versions supported by these releases are vulnerable to the ROBOT attack (CVE-2017-1000385) | 
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RabbitMQ 3.5 was released 2015-03-11, and reached end of life 2017-09-11, we strongly discourage its use | 
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RabbitMQ 3.4 was released 2014-10-21, and reached end of life 2017-05-31, we strongly discourage its use |