This topic provides answers to some commonly asked questions about ApsaraMQ for RocketMQ.
FAQ about features
What client versions are ApsaraMQ for RocketMQ 5.0 instances compatible with?
How do I enable the Internet access feature for ApsaraMQ for RocketMQ instances?
What are the differences between ordered messages and normal messages?
How do I obtain the credentials that are required to connect to an ApsaraMQ for RocketMQ broker?
How do I obtain the endpoint that is used to connect to an ApsaraMQ for RocketMQ broker?
What limits are imposed on the number of tags to which I can subscribe in ApsaraMQ for RocketMQ?
How are messages consumed in a topic to which multiple consumer groups subscribe?
What is the maximum size of a message body in ApsaraMQ for RocketMQ?
What is the retention period for messages in ApsaraMQ for RocketMQ?
What load balancing policies are provided by ApsaraMQ for RocketMQ?
Are messages delivered again after they fail to be consumed?
Is the broadcasting consumption mode supported by ApsaraMQ for RocketMQ 5.0 instances?
Do I need to attach disks to an ApsaraMQ for RocketMQ instance for storage?
FAQ about 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 is the "valid resource owner failed" error returned by the client?
Why is the "MQClientException: No route info of this topic" error returned by the client?
Why is the "FETCH_TOPIC_ROUTE_FAILURE" error returned by the client?
Why is the "CODE: 25 DESC: the consumer's subscription not latest" error returned by the client?
FAQ about sales, billing, and instance upgrades and downgrades
Why am I charged even though I did not send or receive messages?
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 the topic that day?
How do I change the VPC with which an ApsaraMQ for RocketMQ 5.x instance is associated?