Get answers to common questions about ApsaraMQ for RocketMQ features, client connections, billing, console usage, and messaging.
Features
Which client versions are compatible with ApsaraMQ for RocketMQ 5.0 instances?
How do I enable Internet access for an ApsaraMQ for RocketMQ instance?
What are the differences between ordered messages and normal messages?
How do I get the credentials required to connect to an ApsaraMQ for RocketMQ broker?
How do I get the endpoint used to connect to an ApsaraMQ for RocketMQ broker?
What are the differences between clustering consumption and broadcasting consumption?
How are messages consumed when multiple consumer groups subscribe to the same topic?
Do ApsaraMQ for RocketMQ 5.0 instances support broadcasting consumption?
Do I need to attach disks to an ApsaraMQ for RocketMQ instance for storage?
Can I enable or disable disk encryption after I purchase an instance?
Client connections
Why does the "signature validate by dauth failed" error occur during client connection?
Why does the "TimeoutException" error occur during client connection?
Why does the client return a "valid resource owner failed" error?
Why does the client return an "MQClientException: No route info of this topic" error?
Why does the client return a "FETCH_TOPIC_ROUTE_FAILURE" error?
Why does the client return a "CODE: 25 DESC: the consumer's subscription not latest" error?
Why does the client return a "current message type not match with topic accept message types" error?
Billing and instance management
Why am I charged even though I did not send or receive messages?
How long does a configuration upgrade or downgrade take to apply, and how does it affect messaging?
How do I downgrade an instance from Enterprise Platinum Edition to Standard Edition?
If I delete a topic on an ApsaraMQ for RocketMQ 4.x instance, am I charged for it that day?
How do I change the VPC associated with an ApsaraMQ for RocketMQ 5.x instance?
Console
What do the metrics on the ApsaraMQ for RocketMQ console dashboard mean?
Why can't I query the message trace after consuming a message through consumption verification?
Why can't I see instances, topics, or groups in the console?
Why can't I query the trace of a delayed message in the console?
Are permission policies the same for ApsaraMQ for RocketMQ 5.0 and 4.0 instances?
What is the difference between average TPS and maximum TPS on the dashboard?
Message sending
Message consumption
Why does the first connection from my consumer client to the broker fail?
Are messages lost if the consumer machine fails and restarts?
Can I leave the tag parameter blank when subscribing to messages?
How do I set the consumer offset when subscribing a new consumer group to an existing topic?
Why do messages accumulate in a group even though online consumers are not consuming them?
Why does the dashboard show accumulated messages when the consumer client shows they are consumed?