'x-cache-persistence: disk' does not work properly

[kraanerk]

Context: RabbitMQ 4.1.0, Erlang 27.3.3, elixir 1.16.3, rabbitmq_message_deduplication 0.6.4
Creating an exchange of type x-message-deduplication with 'x-cache-persistence: disk' option creates Mnesia table with storage type ram_copies. Expected behavior: dics_copies storage type should be used instead.

[kraanerk]

Tried also the following setup: RabbitMQ 4.1.0, Erlang 27.3.3, elixir 1.18.3, rabbitmq_message_deduplication 0.7.1.
Results are the same: Mnesia storage type ram_copies is used even though 'x-cache-persistence: disk' option is specified.

[kraanerk]

Tried also the following setup: RabbitMQ 4.1.3, Erlang 27.3.4.2, elixir 1.18.3, rabbitmq_message_deduplication 0.7.1.
Results are the same.

[noxdafox]

I am troubleshooting the issue and I need a bit more information.

• How many nodes is your cluster consisting of?
• Are you launching RMQ with Kepri enabled?

[kraanerk]

Single node, no cluster, no Khepri.