Find answers to common questions about ApsaraMQ for RocketMQ, organized by topic.
Features and messaging
Which client versions are compatible with ApsaraMQ for RocketMQ 5.0 instances?
How do I enable Internet access for an ApsaraMQ for RocketMQ instance?
How do I get the credentials required to connect to an ApsaraMQ for RocketMQ broker?
How do I get the endpoint for connecting to an ApsaraMQ for RocketMQ broker?
Message types and ordering
Consumption modes
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?
What load balancing policies does ApsaraMQ for RocketMQ provide?
Limits and quotas
Storage and encryption
Client connections
Why does a "signature validate by dauth failed" error occur during client connection?
Why does a "TimeoutException" error occur during client connection?
Why does the client return a "valid resource owner failed" error?
Why does the client return a "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?
Does a successful telnet connection to port 8080 of ApsaraMQ for RocketMQ mean the SDK is configured?
A successful
telnetconnection to port 8080 only confirms network-layer connectivity. It does not mean the SDK is configured. To complete the setup, also confirm the following:Identity authentication is configured correctly. For ApsaraMQ for RocketMQ 5.x instances, set a username and password on the Access Control > Intelligent Identity Verification page in the console, and configure the corresponding AccessKey in the SDK.
A topic has been created. Create the topic on the Topics page in the console.
A consumer group has been created. Create the consumer group on the Groups page in the console.
The subscription relationship has been established. After both the topic and the consumer group are created, configure the subscription relationship on the Groups page.
Billing, upgrades, and downgrades
Console
What is the difference between average TPS and maximum TPS on the dashboard?
Why can't I find my instances, topics, or groups in the console?
Why can't I query a message trace after using the consumption verification feature?
Are permission policies the same for ApsaraMQ for RocketMQ 5.0 and 4.0 instances?
Message sending
Message consumption
First-time connection to the broker fails. How do I troubleshoot?
Are messages lost if a consumer group's machine fails and restarts?
Can I leave the tag parameter empty when subscribing to messages?
How do I set the consumer offset when subscribing a new consumer group to an existing topic?
Messages are accumulating in a group, but no online consumers are consuming them. What do I do?