RabbitMQ 4.x refuses to create a policy with an ha-mode key #14064
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| Describe the bugReproduction steps... Expected behaviorrabbitmq-4.0.3 ./rabbitctl set_policy ha-all "^" '{"ha-mode":"all"}' error Additional contextNo response | 
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          Answered by
          
            mkuratczyk
          
      
      
        Jun 11, 2025 
      
    
    Replies: 1 comment
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| Classic queue mirroring (HA policies for classic queues) was removed in RabbitMQ 4.0. That's the main reason it's called 4.0 (a major release, due to a breaking change): https://www.rabbitmq.com/docs/3.13/ha | 
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      Answer selected by
        michaelklishin
  
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Classic queue mirroring (HA policies for classic queues) was removed in RabbitMQ 4.0. That's the main reason it's called 4.0 (a major release, due to a breaking change): https://www.rabbitmq.com/docs/3.13/ha