qianye1001 commented on PR #1339:
URL:
https://github.com/apache/rocketmq-clients/pull/1339#issuecomment-5290708364
Real first-message send validation was completed against a running RocketMQ
broker with the shaded client built from `d426382a` on Alibaba AJDK 21.
Enabled run (`-Drocketmq.client.jmx.enabled=true`):
- Created a fresh producer and confirmed there was no send metric series
before publishing.
- Invoked synchronous `producer.send(...)` exactly once to `Topic_2B_0000`.
- Broker returned message ID `01DE1499736ADC013E0A905BA000000000`.
- Before producer shutdown, the matching MBean reported:
- `rocketmq_send_cost_time_count = 1`
- `rocketmq_send_cost_time_sum = 12 ms`
- `rocketmq_send_cost_time_bucket_le_inf = 1`
- labels: `topic=Topic_2B_0000`, `invocation_status=success`, and the
producer `client_id`
Default-disabled run (no enabling property):
- Created another fresh producer and invoked synchronous
`producer.send(...)` exactly once.
- Broker returned message ID `01DE1499736ADC04660A905BAF00000000`.
- RocketMQ client MBeans before send: `0`; after send: `0`.
This verifies that the actual first published message is counted when opted
in, and that a real send does not initialize or expose JMX metrics when the
feature remains at its default-off setting.
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