The rabbitmq_tracing plugin cannot be installed

[mxmcarl]

Hi,
The rabbitmq_tracing plugin cannot be installed, RabbitMQ/3.8.0 OTP/22
root@rabbitmq-0:/etc# rabbitmq-plugins list
Listing plugins with pattern "." ...
Configured: E = explicitly enabled; e = implicitly enabled
| Status: * = running on [email protected]
|/
[ ] rabbitmq_amqp1_0 3.8.0
[ ] rabbitmq_auth_backend_cache 3.8.0
[ ] rabbitmq_auth_backend_http 3.8.0
[ ] rabbitmq_auth_backend_ldap 3.8.0
[ ] rabbitmq_auth_backend_oauth2 3.8.0
[ ] rabbitmq_auth_mechanism_ssl 3.8.0
[ ] rabbitmq_consistent_hash_exchange 3.8.0
[ ] rabbitmq_event_exchange 3.8.0
[ ] rabbitmq_federation 3.8.0
[ ] rabbitmq_federation_management 3.8.0
[ ] rabbitmq_jms_topic_exchange 3.8.0
[E] rabbitmq_management 3.8.0
[e*] rabbitmq_management_agent 3.8.0
[ ] rabbitmq_mqtt 3.8.0
[ ] rabbitmq_peer_discovery_aws 3.8.0
[ ] rabbitmq_peer_discovery_common 3.8.0
[ ] rabbitmq_peer_discovery_consul 3.8.0
[ ] rabbitmq_peer_discovery_etcd 3.8.0
[ ] rabbitmq_peer_discovery_k8s 3.8.0
[ ] rabbitmq_prometheus 3.8.0
[ ] rabbitmq_random_exchange 3.8.0
[ ] rabbitmq_recent_history_exchange 3.8.0
[ ] rabbitmq_sharding 3.8.0
[ ] rabbitmq_shovel 3.8.0
[ ] rabbitmq_shovel_management 3.8.0
[ ] rabbitmq_stomp 3.8.0
[ ] rabbitmq_top 3.8.0
[ ] rabbitmq_tracing 3.8.0
[ ] rabbitmq_trust_store 3.8.0
[e*] rabbitmq_web_dispatch 3.8.0
[ ] rabbitmq_web_mqtt 3.8.0
[ ] rabbitmq_web_mqtt_examples 3.8.0
[ ] rabbitmq_web_stomp 3.8.0
[ ] rabbitmq_web_stomp_examples 3.8.0

root@rabbitmq-0:/etc/rabbitmq# ls -l
total 16
-rwxrwxrwx 1 root root 615 Jul 29 12:14 enabled_plugins

root@rabbitmq-0:/etc/rabbitmq# rabbitmq-plugins enable rabbitmq_tracing
Enabling plugins on node [email protected]:
rabbitmq_tracing
Error:
{:cannot_write_enabled_plugins_file, "/etc/rabbitmq/enabled_plugins", :ebusy}

The Error: ebusy， who knows why?