The error message in your Aurora MySQL error log indicates a temporary disruption in communication between the MySQL client, likely Datastream in this case, and the MySQL server. While such messages can occur intermittently due to network fluctuations or resource constraints, they should not be ignored if they persist.
To address this issue, start by investigating the stability of the network connection between Aurora MySQL and the Datastream service. Look for any signs of network congestion, latency, or firewall rules that could be interfering with communication. Additionally, monitor the CPU, memory, and disk utilization on your Aurora MySQL instance. High resource usage could contribute to these errors, and scaling up the instance or optimizing MySQL queries might be necessary to reduce the load.
It’s also important to verify that the Datastream configuration is correctly set up and that it has the necessary permissions to access the MySQL binary logs. If you haven’t already, consider cautiously tuning MySQL system variables like net_read_timeout, net_write_timeout, and max_allowed_packet to handle large data packets or slow network responses better.
If your setup includes the MySQL Connector/J library, ensure that you’re using the latest version, as updates often include bug fixes and performance improvements that could reduce communication issues.
While this error in the log does not necessarily indicate a failure in the Datastream process, it’s crucial to ensure that your CDC flow is functioning correctly without data loss or inconsistencies. If the problem persists despite these measures, contacting AWS Support with details of your configuration and the steps you’ve taken may provide further guidance tailored to your specific setup.