"Deprecated features are being used" after upgrade to 2.13.0

[rmd-pm]

Hi folks,

I got this message in the web interface after upgrade.

Steps :
doing a rabbitmqctl enable_feature_flag all berfore upgrade
upgrading server from 3.12.13 to 3.13.0 (erlang version is 26.2.2)
=> the message "Deprecated features are being used" appears in the interface

# rabbitmqctl list_feature_flags
Listing feature flags ...
name    state
classic_mirrored_queue_version  enabled
classic_queue_type_delivery_support     enabled
detailed_queues_endpoint        enabled
direct_exchange_routing_v2      enabled
drop_unroutable_metric  enabled
empty_basic_get_metric  enabled
feature_flags_v2        enabled
implicit_default_bindings       enabled
**khepri_db       disabled**
listener_records_in_ets enabled
maintenance_mode_status enabled
message_containers      enabled
quorum_queue    enabled
restart_streams enabled
stream_filtering        enabled
stream_queue    enabled
stream_sac_coordinator_unblock_group    enabled
stream_single_active_consumer   enabled
stream_update_config_command    enabled
tracking_records_in_ets enabled
user_limits     enabled
virtual_host_metadata   enabled

# **rabbitmqctl enable_feature_flag khepri_db**
Enabling feature flag "khepri_db" ...
Error:
{:failed_to_deny_deprecated_features, [:classic_queue_mirroring]}

In rabbitmq log file : 
2024-03-20 12:38:37.501215+00:00 [error] <0.3869555.0> Deprecated features: `classic_queue_mirroring`: can't deny deprecated feature because it is actively used
2024-03-20 12:38:37.619973+00:00 [error] <0.336.0> Feature flags: failed to enable `classic_queue_mirroring`: {error,
2024-03-20 12:38:37.619973+00:00 [error] <0.336.0>                                                             {failed_to_deny_deprecated_features,
2024-03-20 12:38:37.619973+00:00 [error] <0.336.0>                                                              [classic_queue_mirroring]}}
2024-03-20 12:38:37.737669+00:00 [error] <0.336.0> Feature flags: failed to enable `khepri_db`: {error,
2024-03-20 12:38:37.737669+00:00 [error] <0.336.0>                                               {failed_to_deny_deprecated_features,
2024-03-20 12:38:37.737669+00:00 [error] <0.336.0>                                                [classic_queue_mirroring]}}

As the message in the interface is certainly caused by this feature flag, how can I enable it ?

[lukebakken]

Thanks for using RabbitMQ.

As the message states, you are using a deprecated feature, classic_queue_mirroring. This means that at least one classic queue in your cluster has a HA policy that applies to it.

If you want your data to be mirrored, you must use only quorum queues.

[rmd-pm]

Hi Luke,

after deleting all HA policies, everything is fine. Thanks for your help !