This topic provides answers to commonly asked questions about ApsaraMQ for Kafka instances.
Billing issues
Client errors
Network issues
What do I do If the attempt to ping the endpoint of ApsaraMQ for Kafka failed?
How do I connect an ECS instance in one zone to an ApsaraMQ for Kafka instance in another zone?
Can I access an ApsaraMQ for Kafka instance over the Internet?
How do I access an ApsaraMQ for Kafka instance by using a proxy?
Do I have to select the 172.16.0.0/12 CIDR block for a classic network?
Can we connect ApsaraMQ for Kafka instances in two different VPCs?
Message sending issues on clients
Why does a PHP client experience a long delay when it sends a message?
How can I determine whether a message is sent after I send the message on the client?
How many connections to the broker can a producer establish?
Does the callback setting on the Java client affect the message sending speed?
What do I do if an error is reported when I use the ApsaraMQ for Kafka client?
What do I do If the attempt to ping the endpoint of ApsaraMQ for Kafka failed?
Message consumption issues on clients
What do I do if an exception occurs when a client connects to ApsaraMQ for Kafka for the first time?
What do I do if messages are accumulated when I use ApsaraMQ for Kafka?
Why does a consumer slowly pull a message from the broker or fail to pull a message from the broker?
What do I do if the "Not authorized to access group" error message is returned?
Instance issues
Which open source Apache Kafka versions are supported by ApsaraMQ for Kafka instances?
How can I obtain the VPC information required for deploying an instance?
What problems may occur if you upgrade ApsaraMQ for Kafka brokers?
Why am I unable to change the region or network type of the instance?
When are historical messages deleted from ApsaraMQ for Kafka?
How can I perform a quick test on the ApsaraMQ for Kafka broker?
Can I access an ApsaraMQ for Kafka instance over the Internet?
Can we connect ApsaraMQ for Kafka instances in two different VPCs?
Do I have to select the 172.16.0.0/12 CIDR block for a classic network?
Why does it take so long to upgrade my ApsaraMQ for Kafka instance?
Topic issues
Consumer group issues
Why can a consumer group that does not appear in the console consume messages?
How do I determine which IP addresses are consuming messages?
Do the NFS cloud disks attached to consumers affect the message processing speed of consumers?
Why am I unable to view the consumer information in the console?
Why do I fail to view the subscriptions of a consumer group in the ApsaraMQ for Kafka console?
Why is a partition consumed by multiple consumption threads?
Why does the Groups page display more consumer groups than I created?
Why is the Accumulated Messages value of a group 0 or empty?
FAQ about API calls
Monitoring and alerting issues
Why do I need to upgrade my instance to support monitoring and alerts?
What can I do if Insufficient Data is displayed for Status in the Alert Items dialog box?
Why can I view monitoring information with my Alibaba Cloud account, but cannot do so as a RAM user?
Why am I unable to log on to the instance with ApsaraMQ for Kafka deployed?